TW475907B - Method for treating exhaust gas from molten furnace and its apparatus - Google Patents

Method for treating exhaust gas from molten furnace and its apparatus Download PDF

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Publication number
TW475907B
TW475907B TW086118066A TW86118066A TW475907B TW 475907 B TW475907 B TW 475907B TW 086118066 A TW086118066 A TW 086118066A TW 86118066 A TW86118066 A TW 86118066A TW 475907 B TW475907 B TW 475907B
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Taiwan
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dust
gas
furnace
ash
waste
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TW086118066A
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Chinese (zh)
Inventor
Hajime Jinbo
Toshiro Amamiya
Takeshi Kikuchi
Yasuyuki Aida
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Ebara Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/16Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027Metallic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068Other inorganic materials, e.g. ceramics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023Pockets filters, i.e. multiple bag filters mounted on a common frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/40Acidic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/64Heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81Solid phase processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/604Hydroxides

Abstract

The present invention provides a method to heighten the concentration of nonferrous heavy metal contained in smoke dust by removing the smoke dust contained in the waste gas of a melting furnace, by removing the smoke dust contained in the waste gas, and adding an alkaline chemical to remove acidic gas contained in the waste gas.

Description

475907475907

B 五、發明説明(1 ) 發明的持銜頜域 本發明係於熔爐排出的廢氣之處理方法有顒,尤指* 去除熔融焚化灰之熔爐所排出的廢氣中之烟塵及酸性氣體 之廢氣處理方法及裝置有關者。 習用抟術 於第2圖表示習用熔爐排出的廢氣處理裝置。第2圖中 ,由熔爐1熔融焚化灰,排出含有烟塵(soot dust)之廢氣 6。上述廢氣6經由氣體冷却室2等冷却後,為使與廢氣中 之酸性氣體等相互反應,對廢氣噴撒消石灰粉體8 ,再由 袋漶器、電氣集塵機等集塵裝置3,捕集廢氣中之熔融飛 灰10a。上逑飛灰10a中即含有:發生於熔爐1的烟塵及消 石灰的粉體8。 發明所欲解決的間鼸 因城市垃圾與焚燒城市垃圾的焚化灰中含有Pb、Ζη等 非鐵重金屬,故由熔爐1排出的廢氣6中之烟塵乃含有非鐵 重金屬。而由集塵裝置3捕集的熔解飛灰10a中*亦含有歸 因於烟塵的非鐵重金屬。 丨 j 、/ Τ- ΛΜΙ (讀先閱讀背面之注意事項再镇寫本頁) 因此•將該熔融飛灰當做廢棄物處理時,如螫合劑之 處理般,須實行為防止重金羼析出而採藥劑處理。又與焚 化爐廢氣中含有之焚化飛灰比較,熔爐排出之廢氣內的熔 融飛灰含有的重金屬濃度較高,故需要較多量的藥劑及較 多的處理經費。 另一方面,若將該熔融飛灰作為非鐵金屬原料使用, 因含有消石灰,熔融飛灰的重金鼷濃度降低,不宜作為非 本紙張尺度適州中國國家標準(CNS ) Α4規格(210X297公釐) 1 3 9 35 1 475907 A7 B7 五、發明説明(2 鐵金羼原料使用。如Μ城市垃圾含有的Pb、 濟上可回收的有價鑛物最低濃度據云為3.0 熔融飛灰中的Pb、Ζη濃度,因含有消石灰 較此為低*即使Κ酸或水洗等予Μ萃取處 散分離等濃縮處理,亦未能回收成有價物。 燒城市垃圾時,含於廢氣中的焚化飛灰之 度低,不具有回收價值。 解決間穎而樑的丰段 中 ik 樣 導 JT 消 A 卬 本發明之課題係為提供解決上述習用 得Μ不經過特別濃縮過程,亦可不使用特 得可冶煉成非鐵金屬原料之烟塵之熔爐廢 置。 本發明之第1個方案為熔爐排出的廢 其係具有:由第1集塵裝置去除含於廢氣 烟塵的步驟,及為去除被去除烟塵的廢氣 體而添加鹼性藥劑之步驟* Μ及去除實質 之上述鹼性藥劑的步驟,為特徵之熔爐廢 於本發明中,由上逑第1集塵裝置捕 有3.0重量% Μ上之Pb,或2.5重量%以上 其添加之上逑鹼性藥劑為粉體,且Μ 除上述粉體為宜。 而上述第1集塵裝置或上述第2集塵 濾器或電氣集塵機等為宜。 又,上逑鹼性藥劑係含有消石灰或石 Ζη等而言,經 %及2 · 5 % ,但 關係,其濃度 ; λ ,或Μ高溫揮 I 又Κ焚化爐焚 ® 之 鐵重金靥的濃 g 事 項 再 瑣 寫 本 頁 術的問題點, ^ 藥品,即可獲 處理方法及裝 之處理方法。 之含非鐵金屬 所含的酸性氣 不含非鐵金羼 處理方法。 的烟塵係Μ含 Ζη為宜。 2集塵裝置去 置*係使用袋 為宜。 本紙張尺度述州中國國家標準(CNS ) Α4規格(210X297公釐) 2 3 9 35 1 475907 A7 B7 五、發明説^明 提的 係塵 其烟 , 屬 置金 裝鐵 理非 處有 之含 氣之 廢中 爐氣 熔廢 為於 案含 方除 個去 2 為 第及 之 、 明爐 發熔 本有 具 供 性不爐 酸上熔 有質之 含實徼 所除特 中去為 氣及置 廢M裝 的,塵 塵機集 烟應 2 除供第 去之的 被劑繭 除藥藥 去性性 為鹼鹼 及狀述 , 體上 置粉之 裝加屬 塵添金 集而鐵 躉 11 第氣含 程Η 性 熱 耐Μ 有 具 係 置 裝 塵 I 0 ii 第 述 上ο , 置中 裝明 理發 處本 氣 廢 氣將 廢 K 除得 去故 置 , 裝度 。 塵 濃 宜集屬 為由金 器先鐵 滤,非 袋前之 之劑中 布藥塵 漶性烟 成鹼於 製加含 瓷添升 陶於提 或係可 屬明 , 金發塵 、 本烟 膠 之 塑 中 收理 回 處 BU 其間 , 中 體行 氣施 性別 。 酸特 用之屬 利中金 效氣重 有廢對 Μ 除需 予去不 料才, 原 , 羼 屬後金 金塵重 鐵烟含 非除不 為去劑 作於藥 塵又性 烟 鹼 該 的 態 形 0 啻 之 明 發 圖 第第 成 構 之段 置前 裝為 里 3 理 處, 氣 的 出 0 爐 熔 之 , 明爐 發熔 本為 一不 7 表, 圖 中 圖 置 裝 却 冷 體 氣 為 第 (謂先閱讀背面之注意事項再瑣寫本頁) 置 裝 塵 mV 0 )/ 2 第 /(V 段 後 為 4 置 裝 塵 i 0 減化 Μ 焚 融於 熔含 等或 灰 , 如灰 質化 物焚 化之 焚爐 之化 小焚 較理 重處 比為 使係 由常 藉通 係 0 1 者 積 攪 Ms 其 少 爐 熔 導電 孔為 給源 供熱 由述 係上 5 灰融 熔 漸 逐 第內 0 爐 設於 而而 灰熱 飛加 化源 焚熱 的由 中 , 氣 1 廢爐 之熔 爐入 中 圖 1 爐排 化的 焚示 於圖 生未 產由 燒物 燃融 有熔 亦之 〇 部 爐內 熔 1 式爐 a)熔 0 s ο la者 (P體 漿氣 電燒 用燃 使 全 可完 , 不 力 之 本紙張尺度適州中國國家標準( CNS ) A4規格(210X297公釐) 3 393 5 1 475907 A7 B7 五、發明説明(4 ) 出口排出,再予冷却固體化。該固體物之體積較所供給的 灰體積減少甚多。 (謂先閱讀背面之注意事項再填寫本頁) 由熔爐1排出的廢氣6*經由氣體冷却裝置2予以冷却 至導入集塵裝置3之溫度。上述廢氣6係予K冷却至150¾ 〜5501C 為宜。在一實施形態中即Μ冷却至16〇υ〜2301C 為宜,而在另一實施形態即Μ冷却至4001C〜55〇υ為宜。 玆說明任一實施形態之共通事項如下: 由集塵裝置3去除含於廢氣中之烟塵7。集塵裝置宜用 袋漶器或電氣集塵機,且Μ袋滤器較宜。烟塵7内含有多 量非鐵金屬·該捕集之烟塵7即先儲存於烟塵儲存設備, 再搬送至適宜於治煉的設備。由集塵裝置3捕集之烟塵, 以含有3.0重量% Μ上之Pb,或2.5重量% Μ上之Ζη為宜。 若該烟塵含有4.0重量%以上之Pb,或3.5重量%以上之Ζη 較好。若含5.0重量%以上之Pb,或4·0重量% Μ上之Ζη更 宜。 其後,已去除烟塵的廢氣中所含的酸性氣體再予去除 。先將鹼性藥劑8宜為製成粉體者予以添加入廢氣内。例 如,可使用市售的粉體供給機。再將該鹼性藥劑去除。若 鹼性藥劑為粉體時,宜Μ集塵裝置4去除該粉體。集塵裝 置4可視適用狀況選用袋滤器或電氣集塵機。 由集塵裝置4回收的粉體10不含重金屬,故不需特別 處理即可再度利用。例如:消石灰(主成分為:Ca(0H)2) 、石灰(主成分為:CaO)等鹼性鈣化合物為粉體而添加時 ,該回收的粉體可再利用作為水泥的原料。 本紙張尺度適州中國國家標準(CNS ) A4規格(210X297公釐) 4 39351 475907 A7 B7 五、發明説明(5 ) 由後段集塵裝置4排出的廢氣9可經由誘導排風機,或 其他酸性氣體去除裝置,向外排出。 (讀先閱讀背面之注意事項再镇寫本頁) 玆就冷却裝置2內冷却廢氣6至400¾〜550t!之實施形 態說明於后:此時的集塵裝置3 ,係Κ耐熱性工程塑膠、 金屬或陶瓷製成的滤布袋溏器為宜。由該材料製成的濾布 ,在廢氣6之溫度4001C〜550 °C (溫度Μ40〇υ〜5〇ου為宜 )時具有充分的機械強度及耐久性所致。若係金屬質滤布 ,可用網目狀(mesh)不銹鋼。陶瓷製滤布多用多孔質氧化 鋁(alumina)。廢氣之溫度如上述之高溫時,該集塵機可 予Μ小型化。 由集塵裝置3排出的廢氣,係由導入孔導入的冷却空 氣11予Μ冷却。Μ能將廢氣冷却至160¾〜2301C為宜。如 此,可不必對後段集塵裝置4要求特別的耐熱性*而可減 低其成本。 可使用冷却裝置以代替由導入孔導入的冷却空氣11。 又,若Μ氣體冷却裝置2將廢氣6冷却至200¾時,可不設 導入孔。 啻?fe例 玆Μ實施例說明本發明如下,但本發明並不限定於下 述的實施例。 於實施例中*使用第1圖所示本發明熔爐廢氣之處理 裝置。其比較例即使用如第2圖的習用熔爐廢氣之處理裝 置。實施例與比較例之差異係於後段上有無袋滹器而不同 。其他即使用相同要件。且於實施例與比較例中、皆不導 本紙張尺度通州中國國家標準(CNS ) Α4規格(210X297公釐) 5 39351 475907 A7 B7 五、發明説明(6 ) 入冷却空氣11。 (讀先閱讀背面之注意事項再填寫本頁) 熔爐1係使用電漿式灰熔爐(輸出:150kW,最大處理 量:150kg/h)。 灰5係Μ焚化爐燃燒城市垃圾後的焚化灰,以100kg/ hr之速率提供於熔爐1。該焚化灰之成分如表1所示。 表1 成 分 濃 度(重 量 % ) S 1 〇2 56 A 1 2 0 2 7 . 8 F e 2 0 3 3 · 2 CaO 14 MgO 0.71 Na2〇 1 . 3 K2O 0 . 29 Z n 0 . 29 Pb 0 . 2 C u 0.43 供應電力於熔爐1 ,使於空氣中形成電弧放電以產生 10000KM上的高溫電漿氣體流。由該氣體流,14001C爐溫 熔融焚化灰。 氣體冷却裝置2K冷却空氣,將廢氣冷却至約20〇υ。 ^紙張尺度適州中國國家標準(CNS ) Α4規格(210Χ 297公釐) 6 39351 475907 A7 B7 五、發明説明( 袋 布 濾 性 熱 耐 之 V ο 5 5 度 溫 埶^ 耐 用 使 3 置 裝 塵 S 0 之 段 前 器 漶 袋 之 V ο 5 2 度 溫 熱 耐 用 使 置 裝 塵 S 段 後 而 〇 器 滤 灰 石 消 級 特 體 粉 係 劑 藥 性 鹼 之 加 添 Μ 予 表 於 示 ί 身 結 之 驗 試 逑 上 2 表 實 施 例 較 例B. V. Description of the invention (1) The invention of the holding jaw field The present invention relates to a method for treating the exhaust gas discharged from a furnace, especially * to remove the soot and acid gas from the exhaust gas discharged from a furnace for melting incineration ash. Method and device related. Conventional technique The exhaust gas treatment device discharged from a conventional furnace is shown in FIG. 2. In Fig. 2, the incineration ash is melted from the furnace 1, and the exhaust gas 6 containing soot dust is discharged. After the exhaust gas 6 is cooled through the gas cooling chamber 2 and the like, in order to interact with the acid gas and the like in the exhaust gas, the exhaust gas is sprayed with slaked lime powder 8 and then collected by the dust collecting device 3 such as a bag filter and an electric dust collector to capture the exhaust gas The molten fly ash 10a. The upper fly ash 10a contains the soot and slaked powder 8 generated in the furnace 1. Because the non-ferrous heavy metals such as Pb and Zn are contained in the incineration ash of municipal waste and incinerated municipal waste, soot in the exhaust gas 6 discharged from the furnace 1 contains non-ferrous heavy metals. The molten fly ash 10a * collected by the dust collecting device 3 also contains non-ferrous heavy metals due to soot.丨 j 、 / Τ- ΛΜΙ (read the precautions on the back before writing this page) Therefore • When disposing of the molten fly ash as waste, it must be treated as a mixture, to prevent the precipitation of heavy gold. Pharmacy treatment. Compared with the incineration fly ash contained in the waste gas of the incinerator, the molten fly ash contained in the exhaust gas discharged from the furnace has a higher concentration of heavy metals, so it requires a larger amount of chemicals and a larger amount of disposal expenses. On the other hand, if the molten fly ash is used as a non-ferrous metal raw material, the concentration of the heavy gold tincture in the molten fly ash is reduced due to the inclusion of slaked lime, which is not suitable for non-paper sizes as specified in the China National Standard (CNS) A4 (210X297 mm). ) 1 3 9 35 1 475907 A7 B7 V. Description of the invention (2 Iron gold tincture raw materials are used. For example, P in M municipal waste, the lowest concentration of economically recoverable valuable minerals is based on 3.0 Pb, Zn in molten fly ash. Concentration is lower than that with slaked lime * Even if concentrated treatment such as K-acid or water washing, etc. is carried out for separation and separation, it cannot be recovered as valuable materials. When burning municipal waste, the degree of incineration fly ash contained in exhaust gas is low. It does not have recycling value. To solve the problem of ik-like guide JT and A in the middle section of Fengyingliang, the problem of the present invention is to provide a solution to the above-mentioned conventionally obtained M without undergoing a special concentration process, and without special smelting to non-ferrous. The fumes of the metal materials are removed from the furnace. The first aspect of the present invention is the waste discharged from the furnace, which includes the steps of removing the soot contained in the exhaust gas by the first dust collecting device, and removing the removed soot. The step of adding alkaline agent to the waste gas of the gas * M and the step of removing the above-mentioned alkaline agent are characterized in that the furnace is discarded in the present invention, and 3.0% by weight of Pb on M is captured by the first dust collecting device of the upper part. Or 2.5% by weight or more. The alkaline agent is a powder, and M is preferably in addition to the powder. The first dust collecting device, the second dust collecting filter, or an electric dust collector are preferable. The above-mentioned alkaline medicament contains slaked lime or stone Zn, etc., and the% and 2.5%, but the relationship, its concentration; λ, or the concentration of iron heavy metal 靥 that is incinerated by high-temperature incinerators. If you write about the problems of this page, ^ medicines, you can get the treatment method and the treatment method. The acid gas containing non-ferrous metal does not contain the non-ferrous metal tin treatment method. The smoke and dust system M contains Zη is It is better to use 2 bags for dust collection device. It is suitable to use bags. The paper size is stated in the state Chinese National Standard (CNS) A4 specification (210X297 mm) 2 3 9 35 1 475907 A7 B7 Dust, which is a gaseous waste in the possession of gold and iron In the furnace, the gas melting waste is removed in the case. 2 is the first one. The melting furnace has a supply, but the furnace does not have acid. The melting is high. The dust collector of the dust machine should be 2 except for the first cocoon, the drug removal drug is alkaline, and the properties are described, the powder on the body is a dust-adding gold set, and the iron is 11th. Contains Cheng Η heat resistance M has the equipment installed dust I 0 ii As described above ο, the central installation of the open air cut off the waste gas K can be removed, so the installation. Dust concentration should be classified as gold filter first iron filter, non-bag before the medicine cloth dust dusty nicotine to the system plus porcelain containing ceramics or liters of pottery to mention or the system can be Ming, blond hair dust, this tobacco rubber In the middle of the plastic collection, during the BU period, the middle body performs qi and sex. The acid is specially used in the middle of the gold effect gas. If you need to remove it, it is necessary to remove it. Originally, the gold and dust dust iron smoke after the genus is not used as a remover for medicine dust and nicotine. State 0 The first stage of the Mingfa picture is placed in front of the 3rd place, and the gas from the 0 furnace is melted. The open furnace is melted into a table. The picture in the picture is installed but cold. Gas is the first (refer to the precautions on the back and write this page again) Install the dust mV 0) / 2 Paragraph / (4 after the V install 4 install the dust i 0 Subtract Μ Incineration in molten content or ash, For example, the incineration of the incinerator of ash matter incineration is more important than making the system to borrow Ms from the usual system of 0 1 and its small furnace melting conductive hole to provide heat to the source. The 0th furnace is located in the furnace, while the ash heat is added to the source of the incineration, and the gas 1 waste furnace is inserted into the furnace. Figure 1 The incineration of the grate is shown in the diagram. 〇 Furnace type 1 furnace a) Melt 0 s ο la (P body slurry gas burning can be completed with combustion, which is not enough Zhang scale Shizhou Chinese National Standard (CNS) A4 specification (210X297 mm) 3 393 5 1 475907 A7 B7 V. Description of the invention (4) The outlet is discharged and then cooled to solidify. The volume of the solid is larger than the ash supplied The volume has been greatly reduced. (It is necessary to read the precautions on the back before filling this page.) The exhaust gas 6 * discharged from the furnace 1 is cooled by the gas cooling device 2 to the temperature of the dust collection device 3. The above-mentioned exhaust gas 6 is cooled by K to 150¾ ~ 5501C is preferable. In one embodiment, it is preferable that M is cooled to 16〇υ ~ 2301C, and in another embodiment, M is cooled to 4001C ~ 55〇υ. The common matters of any embodiment are described below. It is as follows: The dust and dust 7 contained in the exhaust gas is removed by the dust collector 3. The dust collector is preferably a bag filter or an electric dust collector, and an M bag filter is more suitable. The dust and dust 7 contains a large amount of non-ferrous metals. The captured dust and dust 7 That is, it is stored in the dust storage equipment first, and then transferred to the equipment suitable for refining. The dust collected by the dust collecting device 3 should contain Pb on 3.0% by weight or Zn on 2.5% by weight. The soot contains 4.0% by weight or more of P b, or 3.5% by weight or more of Zη is preferred. It is more preferable to contain 5.0% by weight or more of Pb, or 4.0% by weight of Zη on M. Thereafter, the acidic gas contained in the exhaust gas from which the soot has been removed is re-applied. Removal. The alkaline agent 8 is preferably added to the exhaust gas as a powder. For example, a commercially available powder feeder can be used. This alkaline agent is removed. If the alkaline agent is a powder, the dust collection device 4 should remove the powder. Dust collection device 4 can choose a bag filter or an electric dust collector depending on the applicable situation. The powder 10 recovered by the dust collecting device 4 does not contain heavy metals, so it can be reused without special treatment. For example, when alkaline calcium compounds such as slaked lime (main component: Ca (0H) 2) and lime (main component: CaO) are added as powder, the recovered powder can be reused as a raw material for cement. The paper size is in accordance with China State Standard (CNS) A4 (210X297 mm) 4 39351 475907 A7 B7 V. Description of the invention (5) The exhaust gas 9 discharged from the rear dust collection device 4 can be induced by an exhaust fan or other acid gas Remove the device and discharge it outward. (Read the precautions on the back before writing this page) The following describes the embodiment of cooling exhaust gas in the cooling device 2 from 6 to 400 ¾ to 550 t! The dust collecting device 3 at this time is a heat-resistant engineering plastic, Filter bags made of metal or ceramic are suitable. The filter cloth made of this material has sufficient mechanical strength and durability when the temperature of the exhaust gas 6 is 4001C ~ 550 ° C (temperature M40〇υ ~ 5〇ου is appropriate). If it is a metal filter cloth, mesh stainless steel can be used. Ceramic filter cloths often use porous alumina. When the temperature of the exhaust gas is as high as described above, the dust collector can be miniaturized. The exhaust gas discharged from the dust collecting device 3 is cooled by the cooling air 11 introduced through the introduction hole. Μ can cool the exhaust gas to 160¾ ~ 2301C. In this way, it is possible to reduce the cost of the rear stage dust collecting device 4 without requiring special heat resistance *. A cooling device may be used instead of the cooling air 11 introduced through the introduction hole. In addition, when the M gas cooling device 2 cools the exhaust gas 6 to 200¾, an introduction hole may not be provided. Huh? Example fe The following examples illustrate the present invention, but the present invention is not limited to the examples described below. In the embodiment *, the apparatus for treating the exhaust gas of the furnace of the present invention shown in Fig. 1 is used. The comparative example uses a conventional furnace exhaust gas treatment apparatus as shown in FIG. 2. The difference between the examples and the comparative examples is due to the presence or absence of a bag holder on the rear stage. Others use the same requirements. And in the examples and comparative examples, none of this paper standard Tongzhou Chinese National Standard (CNS) A4 specifications (210X297 mm) 5 39351 475907 A7 B7 V. Description of the invention (6) Cooling air 11 is entered. (Read the precautions on the back before you fill out this page.) The furnace 1 is a plasma ash furnace (output: 150kW, maximum capacity: 150kg / h). The incineration ash after the municipal waste was burned in the ash 5 series M incinerator was supplied to the furnace 1 at a rate of 100 kg / hr. The components of the incineration ash are shown in Table 1. Table 1 Component concentration (% by weight) 2 C u 0.43 supplies electricity to the furnace 1 to cause an arc discharge in the air to generate a high-temperature plasma gas flow at 10000KM. From this gas stream, the incineration ash was melted at a furnace temperature of 14001C. The gas cooling device 2K cools the air and cools the exhaust gas to about 20 °. ^ Paper size China State Standard (CNS) Α4 size (210 × 297 mm) 6 39351 475907 A7 B7 V. Description of the invention (Various heat resistance of bag cloth filter V ο 5 5 ° C) Durable for 3 places of dust The V of the front bag in the section S 0 is 5 2 degrees warm and durable, so that after the installation of the S section of the dust, the addition of the medicinal alkali of the filter graystone destructive special powder system is shown in the figure. Examination Tests Example 2

Pb (重量 Zn (重量 4 . 8 (謂先閱讀背面之注意事項再填寫本頁) ^裝· 圖 11 2 第 示 表 係 第例 示較 表比 係 。 例度 施濃 實之 , 中 1 7 表灰 於飛 融 熔 的 I 捕 3 置 裝 塵 舅 段 前 之 捕 3 置 裝 塵 1— 0 之 圖 訂 中中 灰明 飛發 融本 熔於 的 feR 0 度 濃 之 a ο 加 增 著 顯 度 濃 的 η Ζ 及 b P 之 內 灰 飛 融 熔 4 。 若 用 , 利述 度上 再如 可 故 終 最 理 處 劑 藥 於 棄 廢 時 —1 理 處 〇 劑用 藥利 於再 往M M予 將, 可灰 , 飛 明融 發熔 本的 依站 明 說 厘 簡 之 式 圖 示 表 圖 11 第 圖示 成表 構圖 體 2 全第 的 態 發 用 本。習 形 施 實1 之 置 裝 rrHI 理 處 氣 廢 的 爐 熔 之 明 圖 成 構 體 全 之 置 裝 II 理 處 氣 kF 0 的 爐 熔 明 說 輩 簡 的 號 爐 熔 本紙張尺度適州中國國家標準(CNS ) A4規格(210X 297公釐) 7 393 5 1 475907 8 /--\明 '一吾明發 五 2 3 置 裝 却 冷 攪 WS 氣 器 m 袋 之 置 裝 塵 $ 舅 段 前 為 作 器 0 袋 之 置 裝 塵 ί 舞 段 後 為 作 4 體氣 灰廢 5 6 塵 烟 融 熔 7 8 9 11 1Χ 劑 藥 性 劑 鹼 藥 體 性體粉氣 鹼氣的空 體理收却 粉 處回冷 (謂先閱讀背面之注意事 —· •項再填> 裝—— 寫本頁 訂 噃 I \1 ΡΙ,ΙΓ· 本紙張尺度述州中國國家標準(CNS ) A4規格(210X297公釐) 8 3 9 3 5 1Pb (weight Zn (weight 4.8 (that is, read the precautions on the back before filling out this page)) Figure 11 2 The table shown is the first example compared with the table. The example is shown in the table. The gray fly-melt I catch 3 The dust catch before the installation of the dust section 3 The dust installment 1—0 In the drawing, the gray-ray flying hair melts and melts the feR 0 degree of concentration a ο increases the significance The concentration of η Zn and b P is ash fly-melt. 4. If used, it will be as good as possible when it is discarded. When it is discarded, 1 treatment will be beneficial to the MM, Can be gray, Feiming Rongfa Fufang version of the simplified version of the diagram shown in Figure 11 is shown in Figure 2 shows the composition of the body of the 2nd state of the book. Practice of the implementation of rrHI 1 The picture of the waste furnace melting into the structure of the whole installation II. The furnace melting furnace that handles gas kF 0 is the simplest furnace melting paper size. Applicable to China National Standard (CNS) A4 size (210X 297 mm). 7 393 5 1 475907 8 /-\ Ming'yiwu Mingfa 5 2 3 installed but cold stir WS The air bag of the m bag is installed with the dust. $ The bag is placed with the device before the section. 0 The bag is installed with the dust. After the dance section, it is used as the body. 4 The body gas is ashes. 5 6 The dust is melted. 7 8 9 11 1 × Body powder gas and alkali gas are collected in the empty body, but the powder is cooled down (that is, read the precautions on the back— · • Fill in the items > Packing —— Write this page to order 1I \ 1 ΡΙ, ΙΓ State Chinese National Standard (CNS) A4 Specification (210X297 mm) 8 3 9 3 5 1

Claims (1)

475907 p - H3 第86118 0 6 6號專利申請案 申請專利範圍修正本 (90年1月12日) 氣 廢 的 出 hF 0 爐 熔 由 理 處 係 法 方 tTT^l 理 處 之 氣 廢 爐 熔 種 1 塵金 集鐵 氣非 電含 或之 器內 滤氣 袋廢 由於 用含 使除 : 去 有置 具裝 於塵 在集 徵 1 特第 其之 , 成 法構 方所 之機 上氣 以 廢 的 塵 烟 2除 或去 , 已 pb除 之去 上 K Μ 用 % > 量 蠢聚 ο 0 3 步 有的 含塵 是烟 別之 特 , η , Ζ 屬之 MX 含之 CM 所劑第 中藥之 體及 氣 Μ 性 ; 酸驟 的步 去 置 裝 塵 性成 鹼構 體所 粉機 之塵 灰集 石氣 或電 灰或 石器 消滤 含袋 加 由 添用 鹼 述 前 之 屬 金 鐵 非 含 不 上 質 藥 備 具 於 在 徵 特 其 置 裝 理 處 之 氣 〇 廢 驟爐 步熔 的種 劑一 2 有 含 是 別 特 屬 金 鐵 非 有 含 之 中 氣 廢 於 含 及除 ; 去 爐M 熔用 或膠 , 塑 pb程 上工 Μ 性 Μ ^ 匿耐 oW 3.有 之 η 具濾 由袋 且之 ’ 布 塵滤 烟的 成 製 上瓷 M陶 或 屬 金 經濟部中央標準局員工福利委員會印製 而及 體以 氣 ,, 性機 酸應 的供 含之 所劑 中藥 氣性 及廢鹼 S3® 置塵粉 裝烟之 塵除灰 集去石 1 已或 第除灰 的去石 成以消 構用含 所 加 器 添 ί 0 之 2 屬第 金之 鐵成 非構 含所 不機 上塵 質集 實氣 除電 去或 Μ器 用濾. 袋 由 且 劑 藥 性 鹼 述 上 置 裝 塵 本紙張尺度適用中國國家標準(CNS )Α4規格(210 X 297公董) 1 3 9 3 5 1475907 p-H3 Patent Application No. 86118 0 6 6 Application for Amendment of Patent Scope (January 12, 1990) Production of gas waste hF 0 Furnace melting by the law of tTT ^ l 1 Dust collection of iron and gas collection non-electrical or non-electric filter bag waste due to the use of: to remove the installation equipment installed in the dust in the collection of the first 1 Dust and smoke 2 are removed or removed, pb has been removed, and K Μ is used.% ≫ The amount is stupid. 0 3 Some of the dusty is special, η, Z belongs to MX and contains CM. The physical and gas properties; acidic steps to install the dust ash powder or gas ash or stoneware filter bag containing dust-forming alkali structure, plus the addition of alkali before the iron and non-containing The high-quality medicine is provided in the gas at the location of Zhengte's equipment. 0 The seed agent of the waste furnace melting step. 2 The content is the special metal iron and non-containing gas. The waste gas is contained and removed; go to the furnace M and melt or Adhesive and plastic properties in the pb process. The filter is made of dust and smoke, and it is made of porcelain and ceramics, or printed by the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs. And waste alkali S3® dusting powder dust and dust removal ash collection and removal of stone 1 The ash removal or removal of the ash has been added to the decontamination with the addition device 0 2 The iron is the non-structural content of the gold The dust is collected on the air, and the filter is used to remove electricity or filter. The bag is made of medicine and alkali. The upper part is loaded with dust. The paper size is applicable to China National Standard (CNS) A4 (210 X 297). 1 3 9 3 5 1
TW086118066A 1996-12-13 1997-12-02 Method for treating exhaust gas from molten furnace and its apparatus TW475907B (en)

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KR100936657B1 (en) * 2008-12-26 2010-01-14 장두훈 Fire-prevention of fusion nonferrous metals and efficiency maintenance with air clean system
GB2513154B (en) * 2013-04-17 2015-10-28 Tetronics International Ltd Precious Metal Recovery
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