JPS5930464B2 - spray tower - Google Patents
spray towerInfo
- Publication number
- JPS5930464B2 JPS5930464B2 JP57120686A JP12068682A JPS5930464B2 JP S5930464 B2 JPS5930464 B2 JP S5930464B2 JP 57120686 A JP57120686 A JP 57120686A JP 12068682 A JP12068682 A JP 12068682A JP S5930464 B2 JPS5930464 B2 JP S5930464B2
- Authority
- JP
- Japan
- Prior art keywords
- dust
- inner cylinder
- cylinder
- spray tower
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Electrostatic Separation (AREA)
Description
【発明の詳細な説明】
本発明は、高温高含塵ガスなどの除塵、調温、調湿など
に使用する三重筒式スプレータワーの改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a triple-tube spray tower used for removing dust from high-temperature, highly dust-containing gases, controlling temperature, controlling humidity, and the like.
含塵ガスを処理して清浄化する場合、効率よく電気集塵
を行なうためには、粉塵の電気抵抗が、105〜101
1Ω唾の範囲にあることが必要であり、そのために、電
気集塵機の前段にスプレータワーを設け、含塵ガス中に
水蒸気を吹込んで温度を高めたり、水をスプレーしてガ
ス温度を下げるなどの調温、調湿を行ない、含塵ガス中
の電気抵抗を適正にすることが一般に行なわれている。When processing and cleaning dust-containing gas, in order to perform efficient electrostatic collection, the electrical resistance of the dust must be between 105 and 101.
It is necessary that the temperature be within the range of 1Ω, and for this purpose, a spray tower is installed in front of the electrostatic precipitator, and water vapor is blown into the dust-containing gas to raise the temperature, or water is sprayed to lower the gas temperature. It is common practice to adjust the temperature and humidity to make the electrical resistance of the dust-containing gas appropriate.
三重筒式スプレータワーは、内外筒間を降下するガスが
内筒の外面を加熱するので、内筒内面に付着した噴霧水
を乾燥除去する効果があり、また内外筒間を含塵ガスを
旋回下降させ、遠心効果によって除塵率を高めることが
できるなどの利点がある。The triple cylinder spray tower has the effect of drying and removing spray water adhering to the inner surface of the inner cylinder because the gas falling between the inner and outer cylinders heats the outer surface of the inner cylinder, and also swirls the dust-containing gas between the inner and outer cylinders. It has advantages such as being able to lower the dust removal rate and increase the dust removal rate due to the centrifugal effect.
しかし、従来の三重筒式スプレータワーでは、筒底部に
おいて反転して内筒内に入った含塵ガスは乱流状態にあ
り、内筒下部においてスプレーする場合においては、噴
霧水による内筒下部内面の壁濡れ現象を避けることがで
きない。However, in conventional triple cylinder spray towers, the dust-containing gas that turns around at the bottom of the cylinder and enters the inner cylinder is in a turbulent state, and when spraying at the bottom of the inner cylinder, the spray water is generated on the inner surface of the bottom of the inner cylinder. The wall wet phenomenon cannot be avoided.
三重筒式スプレータワーでは上述のように、この内筒内
面の壁濡れ現象を内外筒間を下降する高温ガスからの伝
熱による乾燥除去によって排除する効果があるが壁濡れ
現象そのものを防止することはできない。As mentioned above, the triple cylinder type spray tower has the effect of eliminating this wall wetting phenomenon on the inner surface of the inner cylinder by drying and removing it by heat transfer from the high temperature gas descending between the outer and outer cylinders, but it is not possible to prevent the wall wetting phenomenon itself. I can't.
この壁濡れが生じた場合には、内筒下部内面に粉塵が付
着し、装置の腐食や、湿潤粉塵の落下による排出トラブ
ル等が避けられない。When this wall wetness occurs, dust adheres to the inner surface of the lower part of the inner cylinder, and corrosion of the device and discharge troubles due to falling wet dust are unavoidable.
従って、従来のスプレータワーにおいては、内筒下部に
おいてスプレーすることが適当でなく、内筒中部や上部
においてスプレーせざるを得なかった。Therefore, in the conventional spray tower, it is not appropriate to spray at the lower part of the inner cylinder, and it is necessary to spray at the middle or upper part of the inner cylinder.
すなわち、スプレーされた水滴のスプレータワー内滞留
時間を長くとることができないので、スプレータワーの
調温、調湿性能において未だ満足とは云えなかった。That is, since it is not possible to increase the residence time of sprayed water droplets in the spray tower, the temperature control and humidity control performance of the spray tower cannot be said to be satisfactory.
本発明は、上述の問題を解決し、スプレータワー内のガ
ス流動状態を改善し、内筒下部内面の壁濡れ現象の発生
を根本的に防止し、調温、調湿能力を高めると共に、ス
プレータワーにおける集塵効率の向上と圧力損失の低減
とを図ることを目的とするものである。The present invention solves the above-mentioned problems, improves the gas flow state in the spray tower, fundamentally prevents the occurrence of wall wetting phenomenon on the inner surface of the lower part of the inner cylinder, improves temperature and humidity control ability, and sprays The purpose is to improve dust collection efficiency and reduce pressure loss in the tower.
本発明者は上記目的を達成するため、モデル実験により
多数の試験を重ねた結果、本発明を完成するに至った。In order to achieve the above object, the present inventor conducted numerous tests through model experiments, and as a result, completed the present invention.
本発明の要旨とするところは、同軸心の立設外筒と内筒
とから成り、含塵ガスを該内外筒間を下降させた後反転
して内筒内を上昇させ、含塵ガスの除塵、調温、調湿を
行なうスプレータワーにおいて、前記内筒下端に、該内
筒より小径の短い同心案内円筒群を、該案内円筒群の下
端が逆円錐形を形成するように配列して垂下したことを
特徴とするスプレータワーにある。The gist of the present invention is to consist of an outer cylinder and an inner cylinder that are erected on a coaxial center, and the dust-containing gas is lowered between the inner and outer cylinders, and then reversed and raised inside the inner cylinder. In a spray tower for dust removal, temperature control, and humidity control, a group of short concentric guide cylinders having a smaller diameter than the inner cylinder are arranged at the lower end of the inner cylinder so that the lower ends of the guide cylinder group form an inverted conical shape. It is located in a spray tower that features drooping.
以下本発明の実施例を図面により説明する。Embodiments of the present invention will be described below with reference to the drawings.
第1図は本発明の実施例の縦断面図、第2図は第1図の
A−A矢視図である。FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a view taken along the line A--A in FIG.
図において、1は含塵ガス入口風管、2は外筒、3はダ
ストホッパ、4は同心案内円筒、5は支持板、6はスプ
レーガン、7はスプレーノズル、8は粉塵排出装置、9
は内筒、10はガス出口風管である。In the figure, 1 is a dust-containing gas inlet wind pipe, 2 is an outer cylinder, 3 is a dust hopper, 4 is a concentric guide cylinder, 5 is a support plate, 6 is a spray gun, 7 is a spray nozzle, 8 is a dust discharge device, 9
1 is an inner cylinder, and 10 is a gas outlet wind pipe.
また矢印はガスの流れの方向を示す。The arrows also indicate the direction of gas flow.
含塵ガス入口風管1からスプレータワー内に導入された
高温高含塵ガスは、内筒9の外面を加熱しながら内筒9
と外筒2との間を下降し、ダストホッパ3の部分に至り
、上方に方向変換して内筒9の内側を上昇する。The high-temperature, highly dust-containing gas introduced into the spray tower from the dust-containing gas inlet wind pipe 1 heats the outer surface of the inner cylinder 9 while blowing the inner cylinder 9.
and the outer cylinder 2, reaches the dust hopper 3, changes direction upward, and ascends inside the inner cylinder 9.
従来この方向変換部は単なる空洞であった。Conventionally, this direction changing section has been a mere cavity.
本発明では、このガスの方向変換部に、内筒9より小径
の短い円筒からなる同心案内円筒4を配設した。In the present invention, a concentric guide cylinder 4 made of a short cylinder having a diameter smaller than that of the inner cylinder 9 is disposed in this gas direction changing section.
この同心案内円筒4は、1個でも効果があるが、数個の
円筒群から成ることが好ましく、整流および集塵効率向
上の効果は、案内円筒4の数が多い方が大きくなる傾向
にある。Although one concentric guide cylinder 4 is effective, it is preferable to consist of a group of several cylinders, and the effect of improving flow rectification and dust collection efficiency tends to be greater when the number of guide cylinders 4 is large. .
一方、製作上の観点から適当数が選定される。On the other hand, an appropriate number is selected from the viewpoint of manufacturing.
案内円筒群4は内筒9から垂下され、第1図に示すよう
に、案内円筒群4の下端が恰も逆円錐形を形成するよう
に配列される。The guide cylinder group 4 is suspended from the inner cylinder 9, and as shown in FIG. 1, the guide cylinder group 4 is arranged so that the lower ends of the guide cylinder group 4 form an inverted conical shape.
この案内円筒群4の下端の形成する逆円錐は、概ねダス
トホッパー3の形状に近いものが好ましい。It is preferable that the inverted cone formed at the lower end of the guide cylinder group 4 be approximately similar in shape to the dust hopper 3.
また、案内円筒4が形成するそれぞれの環状通路の断面
積が等しくなるような案内円筒の組み合わせが、整流効
果から見て適当である。Furthermore, a combination of guide cylinders in which the cross-sectional areas of the respective annular passages formed by the guide cylinders 4 are equal is appropriate from the viewpoint of the rectifying effect.
案内円筒群4は、方向変換するガス流の案内と整流、集
塵効率の向上、圧力損失の低減の作用をなすものである
。The guide cylinder group 4 functions to guide and straighten the gas flow whose direction is changed, improve dust collection efficiency, and reduce pressure loss.
第3図は、第1図B部拡大図であり、ガス流から分離さ
れて落下する粉塵粒子の例を模式的に示す。FIG. 3 is an enlarged view of part B in FIG. 1, and schematically shows an example of dust particles that are separated from the gas flow and fall.
ガス流と共に下降してきた直径dの粉塵粒子11は、B
部においてガスが反転する際、遠心力によってガス流外
に放出される。The dust particles 11 with a diameter d that descended with the gas flow are B
When the gas is reversed in the section, centrifugal force forces it out of the gas stream.
この場合、粒子11の分離速度は粒子径61粒子の周速
度■それぞれの2乗に比例し、方向変換する気流の曲率
半径Rに逆比例する。In this case, the separation speed of the particles 11 is proportional to the square of the circumferential velocity (2) of the particles having a particle diameter of 61, and is inversely proportional to the radius of curvature R of the airflow whose direction is being changed.
案内円筒群4の数を増加すればRが小となり、集塵効率
が上昇する。If the number of guide cylinder groups 4 is increased, R becomes smaller and dust collection efficiency increases.
案内円筒群4は下端が逆円錐形を形成するように配設さ
れているので、反転するガス流は、ダストホッパー3と
この案内円筒群4とが形成する通路から順次分流して案
内円筒群の形成する環状通路に流入し、整流されて内筒
9内を上昇する。Since the guide cylinder group 4 is arranged so that its lower end forms an inverted conical shape, the reversing gas flow is sequentially diverted from the passage formed by the dust hopper 3 and this guide cylinder group 4 to the guide cylinder group. The liquid flows into the annular passage formed by , is rectified, and rises inside the inner cylinder 9 .
従って、スプレータワー下端のガス反転部および内筒9
内部においてガス流に渦流を生ずることがなく、圧力損
失も低減する。Therefore, the gas inversion part and the inner cylinder 9 at the lower end of the spray tower
There is no vortex in the gas flow inside, and pressure loss is also reduced.
また、案内円筒群4によって本発明のスプレータワーは
、内外筒間を下降するガス流に旋回運動を与えて遠心効
果による集塵を行なう従来のスプレータワーとほぼ同等
の集塵効率が得られる。Furthermore, the guide cylinder group 4 allows the spray tower of the present invention to achieve a dust collection efficiency almost equivalent to that of a conventional spray tower, which collects dust by centrifugal effect by imparting swirling motion to the gas flow descending between the inner and outer cylinders.
内外筒間を下降するガス流に旋回運動を付与する場合、
圧力損失は極めて犬となるが、本発明ではこれが不要と
なり、ファン動力を著しく低減させることができる。When applying swirling motion to the gas flow descending between the inner and outer cylinders,
Although the pressure loss is extremely large, this is not necessary in the present invention, and the fan power can be significantly reduced.
内筒9内に入ったガスは、上述のように整流されている
ので、本発明のスプレータワーでは内筒下部にスプレー
ガン6、スプレーノズルTを設けることができ、内筒9
内面の壁濡れ、粉塵付着などを生ずることがなく、内筒
の腐食やダストホッパーへの湿潤粉塵の脱落によって起
るトラブルを起すことがない。Since the gas entering the inner cylinder 9 is rectified as described above, in the spray tower of the present invention, the spray gun 6 and the spray nozzle T can be provided at the lower part of the inner cylinder, and the inner cylinder 9
There is no wetting of the inner wall or dust adhesion, and there are no problems caused by corrosion of the inner cylinder or wet dust falling into the dust hopper.
また、スプレーされた水滴のスプレータワー内滞留時間
を長くすることができ、ガスの調温、調湿を効率よく行
なうことができる。Furthermore, the residence time of sprayed water droplets in the spray tower can be increased, and the temperature and humidity of the gas can be controlled efficiently.
従って、調温、調湿の温度幅、湿度幅を従来より広範囲
にとることができ、従来と同じ大きさでスプレータワー
の性能が増大し、また、同一性能で調温調湿装置の高さ
を低くすることも可能となった。Therefore, the temperature and humidity ranges for temperature and humidity control can be wider than before, the performance of the spray tower is increased with the same size as before, and the height of the temperature and humidity control device is increased with the same performance. It is also possible to lower the
本発明は、以上のように構成したことによって次の効果
をもたらす。The present invention, configured as described above, provides the following effects.
(1) 集塵効率が高い。(1) High dust collection efficiency.
(2)圧力損失が小さい。(2) Low pressure loss.
(3)調温、調湿能力が犬である。(3) Dogs have the ability to regulate temperature and humidity.
(4)装置を小型化できる。(4) The device can be made smaller.
実施例 1
第4図に示す外筒内径1941m、内筒内径154闘、
高さ10641mのモデルスプレータワーの内筒下端に
第5図に示す4個の短円筒から成る同心案内円筒を垂下
して取りつけた。Example 1 As shown in Fig. 4, the outer cylinder inner diameter is 1941 m, the inner cylinder inner diameter is 154 mm,
A concentric guide cylinder consisting of four short cylinders as shown in FIG. 5 was attached to the lower end of the inner cylinder of a model spray tower having a height of 10,641 m so as to hang down therefrom.
各円筒の直径はそれぞれ内径134,115.88.4
9mmで、各円筒間のガス通路断面積を等しくした。The diameter of each cylinder is inner diameter 134, 115.88.4, respectively.
The gas passage cross-sectional area between each cylinder was made equal to 9 mm.
在校例として第6図に示す整流板を内筒下端内部に取り
つけ、内外筒間に6枚の旋回羽根をとりつけた。As an example, a current plate shown in Fig. 6 was installed inside the lower end of the inner cylinder, and six swirl vanes were installed between the inner and outer cylinders.
整流板は、格子目の開口寸法30X30mm1ガス流れ
方向高さ90籠、旋回羽根は、ガス流れ方向高さ83m
m、上下端あ円周方向進み60mmの湾曲羽根とした。The rectifying plate has a grid opening size of 30 x 30 mm and a height of 90 meters in the gas flow direction, and the swirling blade has a height of 83 m in the gas flow direction.
m, the curved blade had a circumferential advance of 60 mm from the upper and lower ends.
なおこの比較例は多数の実験例中、実施例を除くものの
中から、最良の集塵効率と低圧損とを示した例を選定し
たものである。For this comparative example, an example showing the best dust collection efficiency and low pressure loss was selected from a large number of experimental examples, excluding the examples.
粉塵濃度24.3g/Bm’の含塵ガスを一定時間モデ
ルスプレータワーに通気し、捕集した粉塵量から集塵効
率を求めた。A dust-containing gas with a dust concentration of 24.3 g/Bm' was passed through a model spray tower for a certain period of time, and the dust collection efficiency was determined from the amount of dust collected.
また、第4図に示す21°、22,23のマノメータで
各点の静圧を測定し、ピトー管24で風速を測定した。Further, the static pressure at each point was measured using manometers 21°, 22, and 23 shown in FIG. 4, and the wind speed was measured using a pitot tube 24.
以上の測定結果を第1表jこ示す。The above measurement results are shown in Table 1.
□
また、流線の状況を調べるため糸を流しその軌跡をスケ
ッチしたものを第7図に示す。□ In addition, Figure 7 shows a sketch of the trajectory of a thread flowed to investigate the situation of streamlines.
図中(I)、(I) 、(III)は第1表の表示と同
一であり、細線が流線を示す。In the figure, (I), (I), and (III) are the same as those shown in Table 1, and the thin lines indicate streamlines.
本発明の実施例(If)においては、従来のスプレータ
ワー(I)と比較して、圧損が低下し、集塵効率が向上
し、ガス反転部および内筒内のガス流動状態が極めて整
然としている。In the embodiment (If) of the present invention, compared to the conventional spray tower (I), the pressure drop is reduced, the dust collection efficiency is improved, and the gas flow state in the gas reversal section and the inner cylinder is extremely orderly. There is.
比較例(1)は、実施例より集塵効率は高くなるが、圧
損が増加し、また内筒下端に整流板があり、整流板上部
に渦流が生ずるので、スプレーノズルの配設位置が制約
され好ましくない。In Comparative Example (1), the dust collection efficiency is higher than in the Example, but the pressure drop increases, and there is a rectifier plate at the lower end of the inner cylinder, and a vortex is generated above the rectifier plate, so the placement position of the spray nozzle is restricted. It is undesirable.
実施例 2
第5図と同様の同心案内円筒を内筒径4300mmのス
プレータワー下端に取りつけた結果、風量3322 B
m’/mi nにおいて誘引扇風機の差圧が210mm
Aqから2037X71Aqに低下し、扇風機動力は約
3%低下した。Example 2 A concentric guide cylinder similar to that shown in Fig. 5 was attached to the lower end of the spray tower with an inner cylinder diameter of 4300 mm, resulting in an air volume of 3322 B.
The differential pressure of the induced fan is 210 mm at m'/min
Aq decreased to 2037 x 71 Aq, and the electric fan power decreased by about 3%.
また、内筒下部のスプレー水量を最大(0,25ra”
/ mi n )として運転したところ、全く支障なく
運転することができた。In addition, the amount of spray water at the bottom of the inner cylinder is set to the maximum (0.25ra"
/min) and was able to operate without any problems.
第1図は本発明の実施例の縦断面図、第2図は第1図の
A−A矢視図、第3図は第1図のB部拡大図、第4図は
実施例(モデル)の縦断面図、第5図は同心案内円筒の
実施例の側面図、第6図は整流板のaは平面図、bは側
面図、第7図(I)、(II)、(1)はそれぞれ第1
表の(I)、(If)、(I[I)に対応するスプレー
タワー内の流線を示す模式縦断面図である。
1・・・・・・含塵ガス入口風管、2・・・・・・外筒
、3・・・・・・ダストホッパ、4・・・・・・同心案
内円筒、5・・・・・・支持板、6・・・・・・スプレ
ーガン、7・・・・・・スプレーノズル、8・・・・・
・粉塵排出装置、9・・・・・・内筒、10・・・・・
・出口ガス風管、11・・・・・・粉塵粒子、12・・
・・・−整流板、13・・・・・・旋回羽根、21,2
2,23・・・・・・マノメータ、24・・・・・・ピ
トー管、25・・・・・・流線。FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. 2 is a view along arrow A-A in FIG. 1, FIG. 3 is an enlarged view of part B in FIG. ), FIG. 5 is a side view of an embodiment of the concentric guide cylinder, FIG. 6 is a plan view of the current plate, b is a side view, and FIGS. 7 (I), (II), (1 ) are the first
FIG. 2 is a schematic longitudinal sectional view showing streamlines in the spray tower corresponding to (I), (If), and (I[I) in the table. 1... Dust-containing gas inlet wind pipe, 2... Outer cylinder, 3... Dust hopper, 4... Concentric guide cylinder, 5...・Support plate, 6...Spray gun, 7...Spray nozzle, 8...
・Dust discharge device, 9... Inner cylinder, 10...
・Outlet gas wind pipe, 11... Dust particles, 12...
...-straightening plate, 13...swivel vane, 21,2
2, 23... Manometer, 24... Pitot tube, 25... Streamline.
Claims (1)
内外筒間を下降させたのち反転して内筒内を上昇させ、
該含塵ガスの除塵、調温、調湿を行なうスプレータワー
において、前記内筒下端に、該内筒径より小径の短い同
心案内円筒群を、該案内円筒群の下端が逆円錐形を形成
するように配列して垂下したことを特徴とするスプレー
タワー。1 Consisting of an outer cylinder and an inner cylinder with a coaxial core, the dust-containing gas is lowered between the outer and outer cylinders, then reversed and raised inside the inner cylinder,
In the spray tower that performs dust removal, temperature control, and humidity control of the dust-containing gas, a group of short concentric guide cylinders having a smaller diameter than the inner cylinder diameter is formed at the lower end of the inner cylinder, and the lower end of the guide cylinder group forms an inverted conical shape. A spray tower characterized by hanging down in an array.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57120686A JPS5930464B2 (en) | 1982-07-13 | 1982-07-13 | spray tower |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57120686A JPS5930464B2 (en) | 1982-07-13 | 1982-07-13 | spray tower |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5912731A JPS5912731A (en) | 1984-01-23 |
JPS5930464B2 true JPS5930464B2 (en) | 1984-07-27 |
Family
ID=14792438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57120686A Expired JPS5930464B2 (en) | 1982-07-13 | 1982-07-13 | spray tower |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5930464B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1000456C2 (en) * | 1995-05-31 | 1996-12-03 | Hoogovens Aluminium Bv | Process for refining an aluminum scrap melt, and aluminum alloy from refined aluminum scrap. |
-
1982
- 1982-07-13 JP JP57120686A patent/JPS5930464B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5912731A (en) | 1984-01-23 |
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