JP2016109404A - Packed tower for cooling of metal smelting furnace exhaust gas - Google Patents

Packed tower for cooling of metal smelting furnace exhaust gas Download PDF

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JP2016109404A
JP2016109404A JP2014250083A JP2014250083A JP2016109404A JP 2016109404 A JP2016109404 A JP 2016109404A JP 2014250083 A JP2014250083 A JP 2014250083A JP 2014250083 A JP2014250083 A JP 2014250083A JP 2016109404 A JP2016109404 A JP 2016109404A
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tower
exhaust gas
packed bed
packed
smelting furnace
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JP6521285B2 (en
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英喜 善
Hideki Zen
英喜 善
正路 小川
Masaji Ogawa
正路 小川
拓人 山口
Takuto Yamaguchi
拓人 山口
渡 森上
Wataru Morigami
渡 森上
啓晶 田中
Hiroaki Tanaka
啓晶 田中
順秋 耒
Muneaki Rai
順秋 耒
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Mitsubishi Materials Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a packed tower for sulfuric acid exhaust gas cooling, capable of effectively preventing blockage or gas pressure loss caused by dust contained in exhaust gas, and continuing stable operation.SOLUTION: In a packed tower, while rising in the tower, exhaust gas of a metal smelting furnace contacts with circulation liquid flowing down in the tower to be cooled. In the packed tower for metal smelting furnace exhaust gas cooling, a packed bed in the tower is divided into an upper stage and a lower stage; an openable/closable opening part replacing filler according to fluctuation of exhaust gas pressure of the lower stage packed bed is provided on a tower wall of the lower stage packed bed; and formed is a pressure control unit that suppresses increase in pressure loss of exhaust gas passing the lower stage packed bed by replacing used filler with unused filler through the opening part.SELECTED DRAWING: Figure 1

Description

本発明は、金属製錬炉の排ガスを冷却する充填塔に関する。詳しくは、金属製錬炉の排ガスに含まれるダストによって引き起こされる閉塞やガス圧力損失の上昇を効果的に防止し、安定な操業を継続できる金属製錬炉排ガスの冷却用充填塔に関する。   The present invention relates to a packed tower for cooling exhaust gas from a metal smelting furnace. Specifically, the present invention relates to a packed tower for cooling a metal smelting furnace exhaust gas that can effectively prevent clogging caused by dust contained in the exhaust gas of the metal smelting furnace and an increase in gas pressure loss and can continue stable operation.

一般に金属製錬炉の排ガスに含まれる二酸化硫黄(ＳＯ２)は硫酸にして回収されているが、この排ガスは高温でダストが多く含まれているので、該排ガスを洗浄してダストを除去し、冷却した後に硫酸製造工場に導入している。例えば、金属錬炉の排ガスを洗浄塔に導入して循環液（洗浄液）をスプレーしてダストを洗浄し、洗浄した排ガスを冷却塔に導入して循環液（冷却液）をスプレーして冷却する排ガス処理方法が知られている（特許文献１）。 In general, sulfur dioxide (SO 2 ) contained in the exhaust gas of a metal smelting furnace is recovered as sulfuric acid, but since this exhaust gas contains a lot of dust at high temperature, the exhaust gas is washed to remove the dust. After cooling, it is introduced into the sulfuric acid production plant. For example, the exhaust gas from a metal smelting furnace is introduced into a cleaning tower and sprayed with a circulating liquid (cleaning liquid) to clean the dust, and the cleaned exhaust gas is introduced into a cooling tower and sprayed with the circulating liquid (cooling liquid) and cooled. An exhaust gas treatment method is known (Patent Document 1).

また、金属製錬炉の排ガス処理として、例えばスクラバー等のスプレー水によって断熱冷却した後の水蒸気が飽和した約６０〜８０℃の排ガスを、熱交換器等を用いて冷却して約３５〜４５℃まで冷却することによって排ガス中の過剰な水分を凝縮除去することも知られている。   In addition, as an exhaust gas treatment of a metal smelting furnace, for example, an about 60 to 80 ° C. exhaust gas saturated with water vapor after being adiabatically cooled by spray water such as a scrubber is cooled using a heat exchanger or the like to about 35 to 45. It is also known to condense and remove excess water in the exhaust gas by cooling to ° C.

特開２０１１−２０２９３４号公報JP 2011-202934 A

従来のガス冷却設備は多管式熱交換器を用いた構造や充填塔を使ったものが一般的である。しかし、従来の充填塔は排ガスに含まれるダストによって充填材の隙間が詰まって閉塞を生じ、塔内を流れる排ガスの圧力損失が大きくなり、安定な操業を長期間継続することができない問題がある。しかも、閉塞を生じた部分を特定することが難しいため、閉塞を解消するには塔内の充填材の大部分を交換する必要があり、充填材の入れ替え量が多く、作業の負担が大きいと共に操業の停止期間が長くなる問題があった。   Conventional gas cooling equipment generally uses a structure using a multi-tube heat exchanger or a packed tower. However, the conventional packed tower has a problem that the dust contained in the exhaust gas clogs the gap between the fillers, and the pressure loss of the exhaust gas flowing in the tower becomes large, so that stable operation cannot be continued for a long time. . In addition, since it is difficult to identify the portion where the blockage occurred, it is necessary to replace most of the packing material in the tower in order to eliminate the blockage, and the amount of replacement of the packing material is large and the work load is large. There was a problem that the operation stoppage period became longer.

本発明は、従来の上記問題を解決したものであり、排ガスに含まれるダストによって引き起こされる閉塞やガス圧力損失の上昇を効果的に防止し、安定な操業を継続できる製錬炉排ガス冷却用充填塔を提供する。   The present invention solves the above-mentioned conventional problems, effectively prevents clogging caused by dust contained in exhaust gas and increase in gas pressure loss, and can be used for smelting furnace exhaust gas cooling that can continue stable operation. Provide a tower.

本発明によれば、以下の金属製錬炉排ガスの冷却用充填塔が提供される。
〔１〕金属製錬炉の排ガスが塔内を上昇する間に塔内を流下する循環液と接触して冷却される充填塔であって、塔内の充填層が上段と下段に分かれ、下段充填層の排ガス圧力の変動に応じて充填材を入れ替える開閉自在な開口部が下段充填層の塔壁に設けられており、該開口部を通じて使用済み充填材を未使用充填材に入れ替えることによって下段充填層を通過する排ガス圧力損失の上昇を抑制する圧力制御部が形成されていることを特徴とする金属製錬炉排ガスの冷却用充填塔。
〔２〕下段充填層の排ガス圧力、または下段充填層と上段充填層の排ガス圧力、を測定する圧力計が設けられている上記[１]に記載する金属製錬炉排ガスの冷却用充填塔。
〔３〕下段充填層と上段充填層の間に空間が設けられており、該空間の塔壁と、下段充填層の塔壁とに、充填材入替え用の開閉自在な開口部がおのおの設けられている上記[１]〜上記[２]の何れかに記載する金属製錬炉排ガスの冷却用充填塔。
〔４〕上段充填層と下段充填層の充填材の量比が上段７割〜９割、下段１割〜３割である上記[１]〜上記[３]の何れかに記載する充填塔。
〔５〕下段充填層に洗浄水を噴射する洗浄手段が上記開口部を通じて下段充填層と上段充填層の間の空間に挿入自在に形成されており、または該洗浄手段が該空間に設置されている上記[３]〜上記[４]の何れかに記載する金属製錬炉排ガスの冷却用充填塔。
〔６〕塔内の充填層が複数段に形成されており、各充填層の塔壁、または各充填層の塔壁および各充填層間の空間の塔壁に、充填材入替え用の開閉自在な開口部がおのおの設けられている上記[１]〜上記[５]の何れかに記載する金属製錬炉排ガスの冷却用充填塔。
〔７〕塔内を横に広がる棚材によって充填層が支持されており、該棚材は波型の床材と該床材を支える梁材によって形成されており、該床材には塔内を連通する開口が設けられており、その開口率が床材面積の７５％以上である上記[１]〜上記[６]の何れかに記載する金属製錬炉排ガスの冷却用充填塔。
〔８〕内部が空洞の格子状の球体によって充填材が形成されており、該充填材の比表面積が１００ｍ２/ｍ３以上であって、空隙率が９０％以上である上記[１]〜上記[７]の何れかに記載する金属製錬炉排ガスの冷却用充填塔。 According to the present invention, the following packed tower for cooling the metal smelting furnace exhaust gas is provided.
[1] A packed tower that is cooled in contact with the circulating liquid flowing down in the tower while the exhaust gas from the metal smelting furnace rises in the tower, and the packed bed in the tower is divided into an upper stage and a lower stage. Openable and closable openings are provided in the tower wall of the lower packed bed to replace the packing according to fluctuations in the exhaust gas pressure in the packed bed, and the lower stage is obtained by replacing the used filler with unused filler through the opening. A packed tower for cooling exhaust gas from a metal smelting furnace, characterized in that a pressure control unit for suppressing an increase in exhaust gas pressure loss passing through the packed bed is formed.
[2] The packed tower for cooling a metal smelting furnace exhaust gas according to the above [1], wherein a pressure gauge for measuring the exhaust gas pressure of the lower packed bed or the exhaust gas pressure of the lower packed bed and the upper packed bed is provided.
[3] A space is provided between the lower packed bed and the upper packed bed, and an openable and closable opening for replacing the filler is provided in each of the tower wall of the space and the tower wall of the lower packed bed. A packed tower for cooling a metal smelting furnace exhaust gas according to any one of [1] to [2] above.
[4] The packed tower described in any one of [1] to [3] above, wherein the ratio of the amount of filler in the upper packed bed and the lower packed bed is 70% to 90% in the upper stage and 10% to 30% in the lower stage.
[5] A cleaning means for injecting cleaning water into the lower packed bed is formed so as to be freely inserted into the space between the lower packed bed and the upper packed bed through the opening, or the cleaning means is installed in the space. The packed tower for cooling exhaust gas from a metal smelting furnace as described in any one of [3] to [4] above.
[6] The packed bed in the tower is formed in a plurality of stages, and the tower wall of each packed bed or the tower wall of each packed bed and the tower wall in the space between each packed layer can be freely opened and closed for replacing the packing material. The packed tower for cooling metal smelting furnace exhaust gas according to any one of [1] to [5] above, wherein each opening is provided.
[7] The packed bed is supported by a shelf material extending horizontally in the tower, and the shelf material is formed by a corrugated floor material and a beam material that supports the floor material. A cooling tower for cooling a metal smelting furnace exhaust gas according to any one of the above [1] to [6], wherein an opening communicating with the metal smelting furnace is provided, and the opening ratio is 75% or more of the flooring area.
[8] The above [1] to [3], wherein a filler is formed by a grid-like sphere having a hollow inside, a specific surface area of the filler is 100 m 2 / m 3 or more, and a porosity is 90% or more. The packed tower for cooling the exhaust gas from a metal smelting furnace as described in any one of [7] above.

〔具体的な説明〕
本発明の充填塔は、金属製錬炉の排ガスが塔内を上昇する間に塔内を流下する循環液と接触して冷却される充填塔であって、塔内の充填層が上段と下段に分かれ、下段充填層の排ガス圧力の変動に応じて充填材を入れ替える開閉自在な開口部が下段充填層の塔壁に設けられており、該開口部を通じて使用済み充填材を未使用充填材に入れ替えることによって下段充填層を通過する排ガス圧力損失の上昇を抑制する圧力制御部が形成されていることを特徴とする金属製錬炉排ガスの冷却用充填塔である。 [Specific description]
The packed tower of the present invention is a packed tower that is cooled in contact with the circulating liquid flowing down in the tower while the exhaust gas of the metal smelting furnace rises in the tower, and the packed bed in the tower has upper and lower stages. An opening that can be freely opened and closed is provided in the tower wall of the lower packing layer, and the used packing is changed to an unused packing through the opening. It is a packed tower for cooling exhaust gas from a metal smelting furnace, characterized in that a pressure control unit that suppresses an increase in exhaust gas pressure loss passing through the lower packed bed is formed.

本発明に係る充填塔の一例を図１に示す。図１は該充填塔の概略断面図である。図示するように、本発明の充填塔は、銅製錬などの金属製錬炉の排ガスを冷却する充填塔であり、筒状の塔本体１０を有しており、該塔本体１０の底部周壁には上記排ガスを塔内に導入する入口１１が設けられており、塔本体１０の頂部には排ガスが流出する出口１２が設けられている。   An example of a packed tower according to the present invention is shown in FIG. FIG. 1 is a schematic sectional view of the packed tower. As shown in the figure, the packed tower of the present invention is a packed tower that cools the exhaust gas of a metal smelting furnace such as copper smelting, and has a cylindrical tower main body 10. Is provided with an inlet 11 for introducing the exhaust gas into the tower, and an outlet 12 through which the exhaust gas flows out is provided at the top of the tower body 10.

また、塔本体１０の頂部には循環液の入口４０が設けられており、塔底には循環液の出口４１が設けられている。該出口４１にはポンプ５０および熱交換器５１を経由する循環路５２が設けられている。冷却された循環液が塔頂の入口４０から塔内に導入され、塔内を流下して塔底の出口４１から抜き出された後にポンプ５０を通じて熱交換器５１に導入され、該熱交換器５１を流れる冷却水（図示する例では海水）によって循環液が冷却された後に循環路５２を通じて再び塔内に導入される。排ガスが塔内を上昇する間に塔内を流下する循環液と接触して冷却される。   A circulating liquid inlet 40 is provided at the top of the tower body 10, and a circulating liquid outlet 41 is provided at the tower bottom. The outlet 41 is provided with a circulation path 52 through a pump 50 and a heat exchanger 51. The cooled circulating liquid is introduced into the tower through the inlet 40 at the top of the tower, flows down through the tower, is extracted from the outlet 41 at the bottom of the tower, and is introduced into the heat exchanger 51 through the pump 50. The circulating liquid is cooled by the cooling water flowing through 51 (seawater in the illustrated example), and then introduced into the tower again through the circulation path 52. While exhaust gas rises in the tower, it cools in contact with the circulating liquid flowing down in the tower.

図示する例では、該塔本体１０の内部には充填材１３が詰め込まれた充填層１４、１５が形成されている。上記充填材１３は塔内を横に広がる通気性の棚材１６、１７の上側に詰め込まれた状態で支えられている。該棚材１６、１７は上下二段に設けられており、下段充填層１４と上段充填層１５が形成されている。下段充填層１４と上段充填層１５の間に空間１８が形成されている。該下段充填層１４の塔壁および該空間部分１８の塔壁には、下段充填層の排ガス圧力の変動に応じて充填材を入れ替える開閉自在な開口部１９がおのおの設けられており、該開口部１９には蓋２０が設けられている。   In the illustrated example, packed layers 14 and 15 packed with a packing material 13 are formed inside the tower body 10. The packing material 13 is supported in a state of being packed on the upper side of the air-permeable shelf materials 16 and 17 spreading laterally in the tower. The shelf members 16 and 17 are provided in two upper and lower stages, and a lower packed bed 14 and an upper packed bed 15 are formed. A space 18 is formed between the lower packed bed 14 and the upper packed bed 15. Openable and closable openings 19 are provided on the tower wall of the lower packed bed 14 and the tower wall of the space 18 so as to change the packing material according to the fluctuation of the exhaust gas pressure in the lower packed bed. 19 is provided with a lid 20.

充填層の二段形成および開閉自在な開口部によって、使用済み充填材を未使用充填材に入れ替えて下段充填層を通過する排ガス圧力損失の上昇を抑制する圧力制御部が形成されている。金属製錬炉排ガスには付着性のダストが含まれており、このダストが充填材１３に付着して充填材相互の隙間が狭くなり、塔内を通過する排ガスの流通が妨げられて排ガスの圧力損失が上昇する現象が生じるが、上記圧力制御部によって使用済み充填材と未使用充填材とが入れ替えられるので塔内を上昇する排ガスの圧力損失の上昇が抑制される。   By the two-stage formation of the packed bed and the opening that can be freely opened and closed, a pressure control unit that replaces the used filler with an unused filler and suppresses an increase in exhaust gas pressure loss passing through the lower packed bed is formed. The metal smelting furnace exhaust gas contains adhesive dust, which adheres to the filler 13, narrows the gap between the fillers, hinders the flow of exhaust gas passing through the tower, and Although the phenomenon that the pressure loss increases occurs, the pressure control unit replaces the used packing material and the unused packing material, so that the increase in the pressure loss of the exhaust gas rising in the tower is suppressed.

本発明の充填塔は、下段充填層の排ガス圧力を測定する圧力計、または下段充填層と上段充填層の排ガス圧力を測定する圧力計（図示省略）が設けられていることが好ましい。充填層を通過する排ガス圧力の経時的な測定によって排ガスの圧力変動を把握し、充填材の適切な入れ替え時期を判断することができる。   The packed tower of the present invention is preferably provided with a pressure gauge for measuring the exhaust gas pressure in the lower packed bed, or a pressure gauge (not shown) for measuring the exhaust gas pressure in the lower packed bed and the upper packed bed. By measuring the exhaust gas pressure passing through the packed bed over time, it is possible to grasp the pressure fluctuation of the exhaust gas and determine the appropriate replacement timing of the filler.

下段充填層１４の塔壁および該空間部分１８の塔壁におのおの開口部１９を設けることによって、充填材の入れ替えを容易にすることができる。先ず、下段充填層１４の開口部１９を開けて下段充填層１４の使用済み充填材１３を外部に取り出した後に、上記開口部１９を閉じ、次いで空間部分１８の開口部１９を開いて未使用の充填材１３を下段充填層１４に投入することによって、充填材の取り出し作業と入れ込み作業が互いに干渉されずに行われ、充填材の入替えを短時間に円滑に進めることができる。   By providing each opening 19 in the tower wall of the lower packed bed 14 and the tower wall of the space portion 18, replacement of the packing material can be facilitated. First, after opening the opening 19 of the lower packing layer 14 and taking out the used filler 13 of the lower packing layer 14 to the outside, the opening 19 is closed, and then the opening 19 of the space 18 is opened and unused. By inserting the filler 13 into the lower packing layer 14, the filler removal operation and the insertion operation are performed without interfering with each other, and the replacement of the filler can be smoothly advanced in a short time.

下段充填層１４と上段充填層１５の間に空間を設けない場合には、下段充填層１４の塔壁に開口部１９を設ければよい。   When no space is provided between the lower packed bed 14 and the upper packed bed 15, the opening 19 may be provided on the tower wall of the lower packed bed 14.

上段充填層と下段充填層の充填材の量比は上段７割〜９割、下段１割〜３割が好ましい。下段充填層１４はガス入口１１に近く、充填材１３に排ガスに含まれるダストが付着しやすいためにダストの付着量が多いので、主に下段充填層１４の充填材１３の入れ替えを行うようにし、入替えの負担軽減のために充填材の量比を上段７割〜９割、下段１割〜３割にすると良い。下段充填層１４の充填材量を上段充填層の約１/９〜約１/３にすることによって、主に下段充填層１４の充填材１３のみを未使用の充填材１３に入れ替えることによって、排ガスの圧力損失の上昇を十分に抑制しながら、充填材の入替え時間を短くして操業停止時間を短縮することができる。   The amount ratio of the filler in the upper packed bed and the lower packed bed is preferably 70% to 90% in the upper stage and 10% to 30% in the lower stage. Since the lower packing layer 14 is close to the gas inlet 11 and the dust contained in the exhaust gas is likely to adhere to the filler 13, the amount of dust attached is large. Therefore, the filler 13 of the lower packing layer 14 is mainly replaced. In order to reduce the burden of replacement, the amount ratio of the filler should be 70% to 90% in the upper stage and 10% to 30% in the lower stage. By changing the amount of the filler in the lower packing layer 14 to about 1/9 to about 1/3 of the upper packing layer, mainly by replacing only the filler 13 in the lower packing layer 14 with the unused filler 13, While sufficiently suppressing an increase in the pressure loss of the exhaust gas, it is possible to shorten the operation replacement time by shortening the filler replacement time.

図２に示すように、該棚材１６、１７は塔内を横に広がる波型の床材２１と該床材２１を支える梁材２２によって形成されており、該床材２１には塔内を上下に連通する開口２３が設けられている。床材２１の面積に対する開口２３の割合（床材開口率）は床材面積の７５％以上が好ましい。   As shown in FIG. 2, the shelves 16 and 17 are formed by a corrugated floor 21 that spreads horizontally in the tower and a beam 22 that supports the floor 21. Is provided with an opening 23 communicating with the upper and lower sides. The ratio of the opening 23 to the area of the floor material 21 (floor material opening ratio) is preferably 75% or more of the floor material area.

充填材１３は内部が空洞の格子状の球体によって形成され、比表面積１００ｍ２/ｍ３以上および空隙率９０％以上の充填材１３が好ましい。床材２１の開口率が７５％以上であって、比表面積１００ｍ２/ｍ３以上および空隙率９０％以上の充填材１３を用いることによって塔内を通過する排ガスの圧力損失を大幅に抑制することができる。 The filler 13 is formed of a lattice-like sphere having a hollow inside, and is preferably a filler 13 having a specific surface area of 100 m 2 / m 3 or more and a porosity of 90% or more. By using the filler 13 having an opening ratio of the flooring 21 of 75% or more, a specific surface area of 100 m 2 / m 3 or more and a porosity of 90% or more, the pressure loss of the exhaust gas passing through the tower is greatly suppressed. be able to.

本発明の充填塔は、必要に応じて、図３に示すように、下段充填層１４に洗浄水を噴射するノズルを備えた洗浄手段３０が上記開口部１９を通じて下段充填層と上段充填層の間の空間１８に挿入自在に形成されている。あるいは、該洗浄手段３０が該空間１８の上段充填層１５の下側に設置されている。   In the packed tower of the present invention, as shown in FIG. 3, the cleaning means 30 equipped with a nozzle for injecting cleaning water to the lower packed bed 14 includes a lower packed bed and an upper packed bed through the opening 19 as required. It is formed to be freely inserted into the space 18 between them. Alternatively, the cleaning means 30 is installed below the upper packed bed 15 of the space 18.

本発明の充填塔は、塔内の充填層を二段より多い複数段に形成し、各充填層の塔壁、または各充填層の塔壁および各充填層間の空間の塔壁に、充填材入替え用の開閉自在な開口部をおのおの設けた構造でも良い。   In the packed tower of the present invention, the packed bed in the tower is formed in a plurality of stages more than two stages, and the packing material is provided on the tower wall of each packed bed, or the tower wall of each packed bed and the space between the packed layers. A structure in which each opening / closing opening for replacement is provided may be used.

本発明の充填塔は、下段充填層１４と上段充填層１５の間の空間１８と該空間部分の塔壁に設けた開口部１９によって圧力制御部が形成されており、該圧力制御部によって使用済み充填材を未使用充填材に入れ替えて塔内を上昇する排ガスの圧損を抑制することができるので、安定な操業を長期間継続することができる。   In the packed tower of the present invention, the pressure control unit is formed by the space 18 between the lower packed bed 14 and the upper packed bed 15 and the opening 19 provided in the tower wall of the space portion. Since it is possible to suppress the pressure loss of the exhaust gas rising in the tower by replacing the used packing material with an unused packing material, stable operation can be continued for a long time.

また、上段充填層と下段充填層の充填材の量比を、例えば上段７割〜９割、下段１割〜３割にし、主に下段充填層の充填材を入れ替えることによって充填材の入替えを迅速に行うことができ、操業停止時間を短縮することができるので経済性が向上する。
さらに、例えば、製錬炉を一時的に短時間停止するときに、この停止時間内に下段充填層の入れ替えを行うことができるので、製錬炉と充填塔の操業を容易に一致させることができ、製錬炉と充填塔との操業適合性が良い。 In addition, the amount ratio of the filler in the upper packing layer and the lower packing layer is, for example, 70% to 90% in the upper stage, 10% to 30% in the lower stage, and the replacement of the filler is mainly performed by replacing the filler in the lower packing layer. Since it can be performed quickly and the operation stop time can be shortened, the economy is improved.
Furthermore, for example, when the smelting furnace is temporarily stopped for a short time, the lower packed bed can be replaced within this stop time, so that the operations of the smelting furnace and the packed tower can be easily matched. Yes, the operation compatibility between the smelting furnace and the packed tower is good.

また、充填層ごとに圧力損失を測定することによって充填材の入替えのタイミングや入替え量を的確に判断することができる。
さらに、下段充填層のダストが付着した充填材を適宜に入れ替えることによって、排ガスに含まれるダストを捕集し除去する効果を得ることができる。 Further, by measuring the pressure loss for each packed bed, it is possible to accurately determine the timing and amount of replacement of the filler.
Furthermore, the effect which collects and removes the dust contained in waste gas can be acquired by replacing | exchanging suitably the filler to which the dust of the lower stage packing layer adhered.

本発明に係る充填塔の一例を示す概略断面図。The schematic sectional drawing which shows an example of the packed tower which concerns on this invention. 棚材の部分概略外観図。The partial schematic external view of a shelf material. 洗浄装置の使用態様を示す充填塔の部分概略断面図。The partial schematic sectional drawing of the packed tower which shows the usage condition of a washing | cleaning apparatus. 実施例２の結果を示すグラフThe graph which shows the result of Example 2

〔実施例１〕
本発明に係る充填塔の一例を図１に示す。図示するように、本発明の充填塔は筒状の塔本体１０を有する。該塔本体１０の底部周壁には排ガスを塔内に導入する入口１１が設けられており、塔本体１０の頂部には排ガスが流出する出口１２が設けられている。塔本体１０の頂部には循環液の入口４０が設けられており、塔底には循環液の出口４１が設けられている。該出口４１にはポンプ５０および熱交換器５１を経由する循環路５２が設けられている。
該塔本体１０の内部には充填材１３が詰め込まれた充填層１４、１５が形成されている。充填材１３は塔内を横に広がる棚材１６、１７の上側に詰め込まれた状態で支えられている。該棚材１６、１７は上下二段に設けられており、下段充填層１４と上段充填層１５が形成されている。下段充填層１４と上段充填層１５の間に空間１８が形成されている。該空間部分の塔壁には開口部１９と該開口部１９の蓋２０が設けられており、充填層の二段形成および開閉自在な開口部によって、使用済み充填材を未使用充填材に入れ替えて下段充填層を通過する排ガス圧力損失の上昇を抑制する圧力制御部が形成されている。
図示する例では、上段充填層と下段充填層の充填材の量比は上段７割〜９割、下段１割〜３割に形成されている。
図２に示すように、該棚材１６、１７は塔内を横に広がる波型の床材２１と該床材２１を支える梁材２２によって形成されており、該床材２１には塔内を上下に連通する開口２３が設けられている。床材２１の面積に対する開口２３の割合（床材開口率）は床材面積の７５％以上である。 充填材１３は内部が空洞の格子状の球体によって形成されており、比表面積１００ｍ２/ｍ３以上および空隙率９０％以上である [Example 1]
An example of a packed tower according to the present invention is shown in FIG. As shown in the figure, the packed tower of the present invention has a cylindrical tower body 10. An inlet 11 for introducing exhaust gas into the tower is provided on the bottom peripheral wall of the tower body 10, and an outlet 12 through which the exhaust gas flows out is provided at the top of the tower body 10. A circulating liquid inlet 40 is provided at the top of the tower body 10, and a circulating liquid outlet 41 is provided at the tower bottom. The outlet 41 is provided with a circulation path 52 through a pump 50 and a heat exchanger 51.
Packed layers 14 and 15 filled with a filler 13 are formed inside the tower body 10. The packing material 13 is supported in a state of being packed on the upper side of the shelf materials 16 and 17 that spread laterally in the tower. The shelf members 16 and 17 are provided in two upper and lower stages, and a lower packed bed 14 and an upper packed bed 15 are formed. A space 18 is formed between the lower packed bed 14 and the upper packed bed 15. An opening 19 and a lid 20 for the opening 19 are provided on the tower wall of the space portion, and the used packing material is replaced with an unused packing material by the two-stage formation of the packed bed and the opening that can be opened and closed. Thus, a pressure control unit that suppresses an increase in exhaust gas pressure loss passing through the lower packed bed is formed.
In the illustrated example, the amount ratio of the fillers in the upper and lower packing layers is 70% to 90% in the upper stage and 10% to 30% in the lower stage.
As shown in FIG. 2, the shelves 16 and 17 are formed by a corrugated floor 21 that spreads horizontally in the tower and a beam 22 that supports the floor 21. Is provided with an opening 23 communicating with the upper and lower sides. The ratio of the opening 23 to the area of the floor material 21 (floor material opening ratio) is 75% or more of the floor material area. The filler 13 is formed of a lattice-like sphere having a hollow inside, and has a specific surface area of 100 m 2 / m 3 or more and a porosity of 90% or more.

〔実施例２〕
実施例１の充填塔（下段充填層１８ｍ３、上段充填層９０ｍ３）を用い、銅製錬炉排ガスを１４５０Ｎｍ３/分の流量で塔内に導入し、各充填層を通過する排ガスの圧力損失を測定した。この結果を図４に示す。図示するように、操業３ケ月のときに下段充填層の圧力損失が上昇し、圧力損失が高い状態が続くが、上段充填層には圧力損失の急激な上昇は生じない。従って、圧力損失が上昇した下段充填層の充填材を入れ替えることによって安定な操業が継続できることが確認された。 [Example 2]
Using the packed tower of Example 1 (lower packed bed 18 m 3 , upper packed bed 90 m 3 ), copper smelting furnace exhaust gas was introduced into the tower at a flow rate of 1450 Nm 3 / min, and the pressure loss of the exhaust gas passing through each packed bed Was measured. The result is shown in FIG. As shown in the figure, the pressure loss of the lower packed bed increases and the pressure loss continues to be high at the time of operation for three months, but the pressure loss does not increase rapidly in the upper packed bed. Therefore, it was confirmed that stable operation can be continued by replacing the filler in the lower packed bed in which the pressure loss has increased.

１０−塔本体、１１−ガス入口、１２−ガス出口、１３−充填材、１４−下段充填層、１５−上段充填層、１６−棚材、１７−棚材、１８−空間、１９−開口部、２０−蓋、２１−床材、２２−梁材、２３−開口、３０−洗浄手段、４０−循環液入口、４１−循環液出口、５０−ポンプ、５１−熱交換器、５２−循環路。

10-tower body, 11-gas inlet, 12-gas outlet, 13-filler, 14-lower packed bed, 15-upper packed bed, 16-shelf, 17-shelf, 18-space, 19-opening 20-lid, 21-floor material, 22-beam material, 23-opening, 30-cleaning means, 40-circulating fluid inlet, 41-circulating fluid outlet, 50-pump, 51-heat exchanger, 52-circulation path .

Claims (8)

金属製錬炉の排ガスが塔内を上昇する間に塔内を流下する循環液と接触して冷却される充填塔であって、塔内の充填層が上段と下段に分かれ、下段充填層の排ガス圧力の変動に応じて充填材を入れ替える開閉自在な開口部が下段充填層の塔壁に設けられており、該開口部を通じて使用済み充填材を未使用充填材に入れ替えることによって下段充填層を通過する排ガス圧力損失の上昇を抑制する圧力制御部が形成されていることを特徴とする金属製錬炉排ガスの冷却用充填塔。 A packed tower that is cooled in contact with the circulating liquid flowing down in the tower while the exhaust gas from the metal smelting furnace rises in the tower, and the packed bed in the tower is divided into an upper stage and a lower stage. Openable and closable openings that replace the filler according to fluctuations in the exhaust gas pressure are provided in the tower wall of the lower packed bed, and the lower packed bed is formed by replacing the used filler with the unused filler through the opening. A packed tower for cooling the exhaust gas from a metal smelting furnace, characterized in that a pressure control unit is formed to suppress an increase in exhaust gas pressure loss. 下段充填層の排ガス圧力、または下段充填層と上段充填層の排ガス圧力、を測定する圧力計が設けられている請求項１に記載する金属製錬炉排ガスの冷却用充填塔。 The packed tower for cooling a metal smelting furnace exhaust gas according to claim 1, further comprising a pressure gauge for measuring the exhaust gas pressure of the lower packed bed or the exhaust gas pressure of the lower packed bed and the upper packed bed. 下段充填層と上段充填層の間に空間が設けられており、該空間の塔壁と、下段充填層の塔壁とに、充填材入替え用の開閉自在な開口部がおのおの設けられている請求項１〜請求項２の何れかに記載する金属製錬炉排ガスの冷却用充填塔。 A space is provided between the lower packed bed and the upper packed bed, and an openable and closable opening for replacing the filler is provided in each of the tower wall of the space and the tower wall of the lower packed bed. A packed tower for cooling the metal smelting furnace exhaust gas according to claim 1. 上段充填層と下段充填層の充填材の量比が上段７割〜９割、下段１割〜３割である請求項１〜請求項３の何れかに記載する充填塔。 The packed tower according to any one of claims 1 to 3, wherein the amount ratio of the packing material in the upper packed bed and the lower packed bed is 70% to 90% in the upper stage and 10% to 30% in the lower stage. 下段充填層に洗浄水を噴射する洗浄手段が上記開口部を通じて下段充填層と上段充填層の間の空間に挿入自在に形成されており、または該洗浄手段が該空間に設置されている請求項３〜請求項４の何れかに記載する金属製錬炉排ガスの冷却用充填塔。 The cleaning means for injecting cleaning water into the lower packed bed is formed so as to be freely inserted into the space between the lower packed bed and the upper packed bed through the opening, or the cleaning means is installed in the space. A packed tower for cooling a metal smelting furnace exhaust gas according to any one of claims 3 to 4. 塔内の充填層が複数段に形成されており、各充填層の塔壁、または各充填層の塔壁および各充填層間の空間の塔壁に、充填材入替え用の開閉自在な開口部がおのおの設けられている請求項１〜請求項５の何れかに記載する金属製錬炉排ガスの冷却用充填塔。 The packed bed in the tower is formed in a plurality of stages, and an openable and closable opening for replacing the packing material is formed on the tower wall of each packed bed, or on the tower wall of each packed bed and the space between the packed layers. 6. A packed tower for cooling a metal smelting furnace exhaust gas according to any one of claims 1 to 5, which is provided. 塔内を横に広がる棚材によって充填層が支持されており、該棚材は波型の床材と該床材を支える梁材によって形成されており、該床材には塔内を連通する開口が設けられており、その開口率が床材面積の７５％以上である請求項１〜請求項６の何れかに記載する金属製錬炉排ガスの冷却用充填塔。 The packed bed is supported by a shelf material extending horizontally in the tower, and the shelf material is formed by a corrugated floor material and a beam material that supports the floor material, and the floor material communicates with the interior of the tower. The packed tower for cooling metal smelting furnace exhaust gas according to any one of claims 1 to 6, wherein an opening is provided and the opening ratio is 75% or more of the flooring area. 内部が空洞の格子状の球体によって充填材が形成されており、該充填材の比表面積が１００ｍ２/ｍ３以上であって、空隙率が９０％以上である請求項１〜請求項７の何れかに記載する金属製錬炉排ガスの冷却用充填塔。
The filler is formed by a lattice-like sphere having a hollow inside, the specific surface area of the filler is 100 m 2 / m 3 or more, and the porosity is 90% or more. A packed tower for cooling a metal smelting furnace exhaust gas as described in any one of the above.
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JP2011202934A (en) * 2010-03-26 2011-10-13 Pan Pacific Copper Co Ltd Apparatus for processing exhaust gas in nonferrous smelting facility, and method for processing exhaust gas in nonferrous smelting facility
CN104043305A (en) * 2013-03-15 2014-09-17 广西玉柴机器股份有限公司 Cast casting dust removal system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06213578A (en) * 1992-12-25 1994-08-02 Ayako Hatano Dust removal cooling device of melting furnace
JPH06201276A (en) * 1993-01-06 1994-07-19 Nkk Corp Heat storage burner
JP2011202934A (en) * 2010-03-26 2011-10-13 Pan Pacific Copper Co Ltd Apparatus for processing exhaust gas in nonferrous smelting facility, and method for processing exhaust gas in nonferrous smelting facility
CN104043305A (en) * 2013-03-15 2014-09-17 广西玉柴机器股份有限公司 Cast casting dust removal system

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