JP2000176308A - Dry electric dust collector and flue thereof - Google Patents
Dry electric dust collector and flue thereofInfo
- Publication number
- JP2000176308A JP2000176308A JP36300998A JP36300998A JP2000176308A JP 2000176308 A JP2000176308 A JP 2000176308A JP 36300998 A JP36300998 A JP 36300998A JP 36300998 A JP36300998 A JP 36300998A JP 2000176308 A JP2000176308 A JP 2000176308A
- Authority
- JP
- Japan
- Prior art keywords
- flue
- distribution plate
- exhaust gas
- dew point
- dry
- 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.)
- Pending
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Electrostatic Separation (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は乾式電気集塵装置及
びその煙道に係り、特にボイラから排出され硫黄酸化物
や窒素酸化物が含まれる排ガス中にアンモニアを注入す
ることによって発生する硫安や硝安をダストと共に捕集
する乾式電気集塵装置及びその煙道に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry electric precipitator and a flue thereof, and more particularly to an ammonium precipitant produced by injecting ammonia into exhaust gas discharged from a boiler and containing sulfur oxides and nitrogen oxides. The present invention relates to a dry electric precipitator for collecting ammonium nitrate together with dust and a flue thereof.
【０００２】[0002]
【従来の技術】石油や重油を燃料とするボイラから排出
される排ガス中には、ダストの他に硫黄酸化物や窒素酸
化物が含まれている。従来、このボイラの排ガス処理を
電子ビーム装置で処理する場合、硫黄酸化物や窒素酸化
物をアンモニアと反応させると、硫安や硝安等の肥料と
して有効に利用できることから、この純度を向上させる
ため、まず、ボイラの排ガスを順次エアヒータ、電気集
塵装置に導き、エアヒータを通過した排ガス中のダスト
を電気集塵装置で除去する。2. Description of the Related Art Exhaust gas discharged from a boiler using petroleum or heavy oil as fuel contains sulfur oxides and nitrogen oxides in addition to dust. Conventionally, when treating the exhaust gas of this boiler with an electron beam device, if sulfur oxides and nitrogen oxides are reacted with ammonia, they can be effectively used as fertilizers such as ammonium sulfate and ammonium nitrate. First, the exhaust gas from the boiler is sequentially led to an air heater and an electric dust collector, and dust in the exhaust gas that has passed through the air heater is removed by the electric dust collector.
【０００３】その後、硫黄酸化物や窒素酸化物を含んだ
排ガスを水スプレ冷却等で水の露点近傍の約６０℃に冷
却した後、電子ビーム装置に導入される。排ガスに電子
ビーム装置の入口でアンモニアを注入し、電子ビーム装
置内で排ガス中の硫黄酸化物や窒素酸化物をアンモニア
と反応させ硫安や硝安を発生させる。硫安や硝安の粒子
を含んだ排ガスを煙道を介して乾式電気集塵装置に導
き、乾式電気集塵装置で排ガス中の硫安及び硝安を捕集
する。[0003] Thereafter, the exhaust gas containing sulfur oxides and nitrogen oxides is cooled to about 60 ° C near the dew point of water by water spray cooling or the like, and then introduced into an electron beam device. Ammonia is injected into the exhaust gas at the entrance of the electron beam device, and sulfur oxides and nitrogen oxides in the exhaust gas react with ammonia in the electron beam device to generate ammonium sulfate and ammonium nitrate. Exhaust gas containing particles of ammonium sulfate and ammonium nitrate is led to a dry-type electrostatic precipitator through a flue, and ammonium sulfate and ammonium nitrate in the exhaust gas are collected by the dry-type electric precipitator.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、電子ビ
ーム装置で生成された硫安や硝安の粒子は付着性が強
く、従来の乾式電気集塵装置内に導入されると、乾式電
気集塵装置の入口拡大煙道内の分布板に付着する。この
ため、長時間の運転で粒子の分布板への堆積量が増加
し、分布板の開口部の閉塞や乾式電気集塵装置の圧力損
失が上昇するという問題があった。However, the particles of ammonium sulfate and ammonium nitrate generated by the electron beam apparatus have a strong adhesive property, and when introduced into a conventional dry-type electrostatic precipitator, the entrance of the dry-type electrostatic precipitator may be reduced. Attaches to distribution plate in enlarged flue. For this reason, there has been a problem that the amount of particles deposited on the distribution plate increases over a long period of operation, and the opening of the distribution plate is closed, and the pressure loss of the dry electric precipitator increases.
【０００５】本発明は、このような事情に鑑みてなされ
たもので、乾式電気集塵装置の分布板への粒子の堆積を
防止する乾式電気集塵装置及びその煙道を提供すること
を目的とする。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a dry-type electrostatic precipitator for preventing the accumulation of particles on a distribution plate of a dry-type electric precipitator and a flue thereof. And
【０００６】[0006]
【課題を解決するための手段】本発明は、前記目的を達
成するために、硫黄酸化物や窒素酸化物が含まれた排ガ
スにアンモニアを注入し電子ビームを照射することによ
って発生した硫安や硝安の粒子を捕集する乾式電気集塵
装置において、前記乾式電気集塵装置の入口側に設けら
れ、前記排ガスを拡散させる分布板と、前記分布板の表
面温度が前記排ガス中に含まれる水蒸気の露点以下にな
るように前記分布板を冷却する冷却手段と、を備えたこ
とを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an ammonium sulfate or ammonium nitrate produced by injecting ammonia into exhaust gas containing sulfur oxides or nitrogen oxides and irradiating the exhaust gas with an electron beam. In a dry-type electrostatic precipitator that collects particles, a distribution plate that is provided on the inlet side of the dry-type electric precipitator and that diffuses the exhaust gas, and that the surface temperature of the distribution plate is higher than that of the water vapor contained in the exhaust gas. Cooling means for cooling the distribution plate so as to have a dew point or less.
【０００７】本発明によれば、冷却手段が分布板の表面
温度が前記排ガス中に含まれる水蒸気の露点以下になる
ように分布板を冷却する。乾式電気集塵装置に供給され
た排ガスが分布板に導かれると、分布板の表面温度が排
ガス中に含まれる水蒸気の露点以下であるため、水蒸気
が分布板の表面で結露し、分布板の表面に付着した硫安
や硝安の粒子が結露水に溶融して除去される。したがっ
て、分布板への硫安や硝安の粒子の堆積を防止すること
ができる。According to the present invention, the cooling means cools the distribution plate so that the surface temperature of the distribution plate becomes equal to or lower than the dew point of the water vapor contained in the exhaust gas. When the exhaust gas supplied to the dry electrostatic precipitator is guided to the distribution plate, the surface temperature of the distribution plate is equal to or lower than the dew point of the water vapor contained in the exhaust gas. Ammonium sulfate and ammonium nitrate particles adhering to the surface are dissolved in the dew condensation water and removed. Therefore, it is possible to prevent the deposition of ammonium sulfate or ammonium nitrate particles on the distribution plate.
【０００８】また、本発明は、前記目的を達成するため
に、硫黄酸化物や窒素酸化物が含まれた排ガスにアンモ
ニアを注入し電子ビームを照射することによって発生し
た硫安や硝安の粒子を含む排ガスを乾式電気集塵装置に
導く乾式電気集塵装置の煙道において、前記煙道の表面
温度が前記排ガス中に含まれる水蒸気の露点以下になる
ように前記煙道を冷却する冷却手段を備えたことを特徴
とする。In order to achieve the above object, the present invention includes ammonium sulfate and ammonium nitrate particles generated by injecting ammonia into an exhaust gas containing a sulfur oxide or a nitrogen oxide and irradiating the exhaust gas with an electron beam. In the flue of the dry electric precipitator that guides the exhaust gas to the dry electric precipitator, a cooling means is provided for cooling the flue so that the surface temperature of the flue is equal to or lower than the dew point of water vapor contained in the exhaust gas. It is characterized by having.
【０００９】本発明によれば、冷却手段は煙道の表面温
度が排ガス中に含まれる水蒸気の露点以下になるように
煙道を冷却する。煙道内に硫安や硝安の粒子を含む排ガ
スが導かれると、煙道の表面温度が排ガス中に含まれる
水蒸気の露点以下であるため、水蒸気が煙道の表面で結
露し、煙道の表面に付着した硫安や硝安の粒子が結露水
に溶融して除去される。したがって、煙道への硫安や硝
安の粒子の堆積を防止することができる。According to the present invention, the cooling means cools the flue so that the surface temperature of the flue is lower than the dew point of water vapor contained in the exhaust gas. When flue gas containing ammonium sulfate or ammonium nitrate particles is introduced into the flue, the flue surface temperature is lower than the dew point of the water vapor contained in the flue gas. The attached ammonium sulfate and ammonium nitrate particles are dissolved in the dew condensation water and removed. Therefore, it is possible to prevent the accumulation of ammonium sulfate and ammonium nitrate particles in the flue.
【００１０】[0010]
【発明の実施の形態】以下添付図面に従って本発明に係
る乾式電気集塵装置及びその煙道の好ましい実施の形態
について詳説する。図１は、ボイラから発生する燃焼ガ
ス中のダストの除塵フローに本発明に係る乾式電気集塵
装置を適用した例である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a dry electric precipitator and a flue thereof according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an example in which a dry electric precipitator according to the present invention is applied to a dust removal flow of dust in combustion gas generated from a boiler.
【００１１】図１に示すように、ボイラ１１から発生し
たダストを含む排ガスは、先ずエアヒータ１２に導か
れ、エアヒータ１２で排ガスの熱が回収される。熱が回
収された排ガスは電気集塵装置１３に供給され、電気集
塵装置１３で排ガス中のダストが除去される。ダストが
除去された排ガスは冷却塔１４に導かれ、冷却塔１４で
水がスプレされ約６０℃に減温される。減温された排ガ
スは電子ビーム装置１５に導かれる。As shown in FIG. 1, the exhaust gas containing dust generated from the boiler 11 is first guided to an air heater 12, and the heat of the exhaust gas is recovered by the air heater 12. The exhaust gas from which the heat has been recovered is supplied to the electrostatic precipitator 13, where the dust in the exhaust gas is removed. The exhaust gas from which dust has been removed is guided to the cooling tower 14, where water is sprayed and the temperature is reduced to about 60 ° C. The cooled exhaust gas is led to the electron beam device 15.
【００１２】排ガスに電子ビーム装置１５の入口でアン
モニアが注入され、電子ビーム装置１５内で排ガス中の
硫黄酸化物及び窒素酸化物がアンモニアと反応し、硫安
及び硝安の粒子が発生する。電子ビーム装置１５内で発
生した粒子は、排ガス流に沿って入口煙道１６を介して
乾式電気集塵装置１７に供給され、乾式電気集塵装置１
７で捕集される。粒子が除去された清浄ガスは、煙突１
８から大気に放出される。Ammonia is injected into the exhaust gas at the entrance of the electron beam device 15, and in the electron beam device 15, sulfur oxides and nitrogen oxides in the exhaust gas react with ammonia to generate ammonium sulfate and ammonium nitrate particles. The particles generated in the electron beam device 15 are supplied to the dry electric precipitator 17 via the inlet flue 16 along the exhaust gas flow, and are supplied to the dry electric precipitator 1.
Collected at 7. The clean gas from which the particles have been removed is
8 to the atmosphere.
【００１３】図２は、前記乾式電気集塵装置１７の構成
を示す断面図である。乾式電気集塵装置１７には、一方
端側面に入口煙道１６が連通され、他方端側面に出口煙
道１９が連通される。排ガスは入口煙道１６から図上矢
印方向で乾式電気集塵装置１７内に供給される。乾式電
気集塵装置１７の入口煙道１６側には、排ガス流に沿っ
て幅が広がっている拡大煙道２１が形成され、この拡大
煙道２１には分布板１０が中空構造で設けられる。乾式
電気集塵装置１７内に供給された排ガスは分布板１０の
間を通過することによって拡散される。FIG. 2 is a cross-sectional view showing the structure of the dry electric precipitator 17. As shown in FIG. One end side of the dry electric precipitator 17 communicates with the inlet flue 16 and the other end side communicates with the outlet flue 19. The exhaust gas is supplied from the inlet flue 16 into the dry electric precipitator 17 in the direction of the arrow in the figure. On the inlet flue 16 side of the dry electric precipitator 17, there is formed an enlarged flue 21 which is widened along the exhaust gas flow, and in this enlarged flue 21, the distribution plate 10 is provided in a hollow structure. The exhaust gas supplied into the dry electric precipitator 17 is diffused by passing between the distribution plates 10.
【００１４】分布板１０の間を通過した排ガスは、集塵
極２３と図示しない放電極との間を通過する。集塵極２
３と放電極との間には直流電圧が印加され、コロナ放電
が発生する。コロナ放電によって、ガス中の粒子は帯電
し、集塵極２３に付着捕集される。粒子が除去された清
浄ガスは、乾式電気集塵装置１７から出口煙道１９で排
出される。The exhaust gas passing between the distribution plates 10 passes between the dust collecting electrode 23 and a discharge electrode (not shown). Dust collection pole 2
A DC voltage is applied between 3 and the discharge electrode, and corona discharge occurs. The particles in the gas are charged by the corona discharge, and are attached to and collected by the dust collecting electrode 23. The clean gas from which the particles have been removed is discharged from the dry electric precipitator 17 at an outlet flue 19.
【００１５】図３は、前記分布板１０の組み立てを示す
斜視図である。同図に示すように、分布板１０は複数の
縦板２０、２０、…（図上では２枚のみ表示）と複数の
横板２２、２２、…（図上では３枚のみ表示）とが格子
状に組み立てられて構成される。縦板２０の裏側には縦
板２０に沿ってパイプ２４が取り付けられ、そのパイプ
２４の一端はポンプ２５に連結しており（図４参照）、
このポンプ２５からパイプ２４内に冷水が供給され、縦
板２０が冷却される。FIG. 3 is a perspective view showing the assembly of the distribution plate 10. As shown in FIG. As shown in the figure, the distribution plate 10 includes a plurality of vertical plates 20, 20,... (Only two are shown in the figure) and a plurality of horizontal plates 22, 22,. It is constructed and assembled in a lattice. A pipe 24 is attached to the back side of the vertical plate 20 along the vertical plate 20, and one end of the pipe 24 is connected to a pump 25 (see FIG. 4).
Cold water is supplied from the pump 25 into the pipe 24, and the vertical plate 20 is cooled.
【００１６】この時、各パイプ２４の上端から冷水を供
給し、下端に達した冷水を再び各パイプ２４の上端に循
環させてもよく、また、１本のパイプ２４の上端から冷
水を供給し、下端に達した冷水を２本目のパイプ２４の
上端に循環させ、これを繰り返してもよい。図２に示す
ように、前記パイプ２４の他端には温度センサ２６が設
けられ、パイプ２４の表面温度が検出される。この温度
センサ２６はコントロール装置２８に信号ケーブル２７
で接続されており、該検出温度はコントロール装置２８
に入力される。このコントロール装置２８には予め排ガ
スに含まれる水蒸気の露点が記憶されている。コントロ
ール装置２８は前記ポンプ２５にケーブル２９で接続さ
れており、予め記憶された露点と該検知温度とに基づい
てポンプ２５を制御する。At this time, cold water may be supplied from the upper end of each pipe 24, and the cold water reaching the lower end may be circulated again to the upper end of each pipe 24, or cold water may be supplied from the upper end of one pipe 24. Alternatively, the cold water reaching the lower end may be circulated to the upper end of the second pipe 24, and this may be repeated. As shown in FIG. 2, a temperature sensor 26 is provided at the other end of the pipe 24, and detects a surface temperature of the pipe 24. This temperature sensor 26 is connected to a control device 28 by a signal cable 27.
And the detected temperature is controlled by the control device 28.
Is input to The dew point of the water vapor contained in the exhaust gas is stored in the control device 28 in advance. The control device 28 is connected to the pump 25 via a cable 29, and controls the pump 25 based on the previously stored dew point and the detected temperature.
【００１７】次に上記の如く構成された乾式電気集塵装
置の作用について説明する。パイプ２４にはポンプ２５
から冷水が供給され、パイプ２４の表面温度は温度セン
サ２６によって検出される。該検出温度２７はコントロ
ール装置２８に入力され、コントロール装置２８は該検
出温度２７と予め記憶された露点とに基づいてポンプ２
５を制御する。即ち、コントロール装置２８は、検知温
度が露点よりも高い場合はパイプ２４内の水流量が多く
なるようにポンプ２５を制御し、検知温度が露点よりも
低い場合はパイプ２４内の水流量が少なくなるようにポ
ンプ２５を制御する。これによって、分布板１０の表面
温度が水蒸気の露点以下に維持される。排ガスが分布板
１０の間を通過すると、分布板１０の表面温度が水の露
点以下であるため、水蒸気が分布板１０の表面で結露
し、分布板１０の表面に付着した硫安や硝安の粒子が結
露水に溶融して除去される。したがって、分布板１０へ
の硫安や硝安の粒子の堆積を防止することができる。Next, the operation of the dry electric precipitator structured as described above will be described. Pump 25 is connected to pipe 24
, And the surface temperature of the pipe 24 is detected by a temperature sensor 26. The detected temperature 27 is input to a control device 28, which controls the pump 2 based on the detected temperature 27 and a previously stored dew point.
5 is controlled. That is, the control device 28 controls the pump 25 so that the water flow rate in the pipe 24 increases when the detected temperature is higher than the dew point, and decreases the water flow rate in the pipe 24 when the detected temperature is lower than the dew point. The pump 25 is controlled so that As a result, the surface temperature of the distribution plate 10 is maintained below the dew point of water vapor. When the exhaust gas passes between the distribution plates 10, since the surface temperature of the distribution plates 10 is lower than the dew point of water, water vapor condenses on the surfaces of the distribution plates 10, and particles of ammonium sulfate and ammonium nitrate adhered to the surfaces of the distribution plates 10. Is dissolved in dew water and removed. Therefore, accumulation of ammonium sulfate or ammonium nitrate particles on the distribution plate 10 can be prevented.
【００１８】尚、図３では縦板２０にのみパイプ２４を
取り付けた例を説明したが、図４に示すように、横板２
２にもパイプ３０、３０、…を取り付けてもよい。この
場合、パイプ３０はパイプ２４と交差しないように、縦
板２０と横板２２との交差部分で湾曲している。また、
図５に示すように、角パイプ５０、５４を格子状に設
け、分布板と兼用させてもよい。Although FIG. 3 shows an example in which the pipe 24 is attached only to the vertical plate 20, as shown in FIG.
2 may be provided with pipes 30, 30,. In this case, the pipe 30 is curved at the intersection of the vertical plate 20 and the horizontal plate 22 so as not to cross the pipe 24. Also,
As shown in FIG. 5, the square pipes 50 and 54 may be provided in a lattice shape, and may also be used as a distribution plate.
【００１９】図６は、前記入口煙道１６の構成を示す斜
視図である。同図に示すように、入口煙道１６の外周は
通風路３２で囲まれ、入口煙道１６と通風路３２との間
はファン３４と送気ダクト３６で連通しており、ファン
３４から入口煙道１６と通風路３２との間に空気が供給
される。前記入口煙道１６には温度センサ４１が設けら
れ、入口煙道１６の表面温度を検出する。温度センサ４
１はコントロール装置４２に信号ケーブル４３で接続さ
れ、該検出温度はコントロール装置４２に入力される。
コントロール装置４２には予め排ガスに含まれる水蒸気
の露点が記憶されている。コントロール装置４２は前記
ファン３４にケーブル４４で接続され、予め記憶された
露点と該検出温度とに基づいてファン３４の回転数を制
御する。FIG. 6 is a perspective view showing the structure of the inlet flue 16. As shown in the figure, the outer circumference of the inlet flue 16 is surrounded by a ventilation path 32, and the space between the inlet flue 16 and the ventilation path 32 communicates with a fan 34 and an air supply duct 36. Air is supplied between the flue 16 and the ventilation passage 32. The entrance flue 16 is provided with a temperature sensor 41 for detecting the surface temperature of the entrance flue 16. Temperature sensor 4
1 is connected to the control device 42 via a signal cable 43, and the detected temperature is input to the control device 42.
The dew point of the water vapor contained in the exhaust gas is stored in the control device 42 in advance. The control device 42 is connected to the fan 34 by a cable 44, and controls the rotation speed of the fan 34 based on the dew point stored in advance and the detected temperature.
【００２０】前記内壁３３の底面は傾斜しており、底面
の最下端部にドレン排水口３５が形成されている。次に
上記の如く構成された入口煙道１６の作用について説明
する。入口煙道１６と通風路３２との間にはファン３４
から空気が供給され、入口煙道１６の表面温度は温度セ
ンサ４１によって検出され、コントロール装置４２に入
力される。コントロール装置４２は該検出温度と予め記
憶された露点とに基づいてファン３４の回転数を制御す
る。即ち、コントロール装置４２は、検知温度が露点よ
りも高い場合はファン３４の回転数を多くするように制
御し、検知温度が露点よりも低い場合はファン３４の回
転数を少なくする又はファン３４が停止するように制御
する。これによって、入口煙道１６の表面温度が水蒸気
の露点以下に維持される。排ガスが入口煙道１６内を流
れると、入口煙道１６の表面温度が水蒸気の露点以下で
あるため水蒸気が入口煙道１６の表面で結露し、入口煙
道１６の表面に付着した硫安や硝安の粒子が結露水に溶
融して流下しドレン排水口３５から排水される。したが
って、入口煙道１６への硫安や硝安の粒子の堆積を防止
することができる。The bottom surface of the inner wall 33 is inclined, and a drain outlet 35 is formed at the lowermost end of the bottom surface. Next, the operation of the inlet flue 16 configured as described above will be described. A fan 34 is provided between the inlet flue 16 and the ventilation passage 32.
, And the surface temperature of the inlet flue 16 is detected by the temperature sensor 41 and input to the control device 42. The control device 42 controls the rotation speed of the fan 34 based on the detected temperature and the previously stored dew point. That is, the control device 42 controls to increase the rotation speed of the fan 34 when the detected temperature is higher than the dew point, and decreases or reduces the rotation speed of the fan 34 when the detected temperature is lower than the dew point. Control to stop. As a result, the surface temperature of the inlet flue 16 is maintained below the dew point of water vapor. When the exhaust gas flows through the inlet flue 16, since the surface temperature of the inlet flue 16 is lower than the dew point of water vapor, the water vapor condenses on the surface of the inlet flue 16, and ammonium sulfate or nitric acid adhered to the surface of the inlet flue 16. Particles are melted in the dew condensation water and flow down to be drained from the drain outlet 35. Therefore, it is possible to prevent the particles of ammonium sulfate and ammonium nitrate from being deposited on the inlet flue 16.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の乾式電気
集塵装置によれば、冷却手段が分布板の表面温度が排ガ
ス中に含まれる水蒸気の露点以下になるように分布板を
冷却することによって、水蒸気が分布板の表面で結露
し、分布板の表面に付着した硫安や硝安の粒子が結露水
に溶融して除去される。したがって、分布板への硫安や
硝安の粒子の堆積を防止することができる。As described above, according to the dry type electrostatic precipitator of the present invention, the cooling means cools the distribution plate so that the surface temperature of the distribution plate becomes lower than the dew point of water vapor contained in the exhaust gas. As a result, water vapor is condensed on the surface of the distribution plate, and particles of ammonium sulfate and ammonium nitrate attached to the surface of the distribution plate are melted and removed by the dew water. Therefore, it is possible to prevent the deposition of ammonium sulfate or ammonium nitrate particles on the distribution plate.
【００２２】また、本発明の乾式電気集塵装置の煙道に
よれば、冷却手段は煙道の表面温度が排ガス中に含まれ
る水蒸気の露点以下になるように煙道を冷却することに
よって、水蒸気が煙道の表面で結露し、煙道の表面に付
着した硫安や硝安の粒子が結露水に溶融して除去され
る。したがって、煙道への硫安や硝安の粒子の堆積を防
止することができる。Further, according to the flue of the dry type electrostatic precipitator of the present invention, the cooling means cools the flue so that the surface temperature of the flue is lower than the dew point of water vapor contained in the exhaust gas. Water vapor condenses on the surface of the flue, and particles of ammonium sulfate and ammonium nitrate adhering to the surface of the flue are dissolved in the condensed water and removed. Therefore, it is possible to prevent the accumulation of ammonium sulfate and ammonium nitrate particles in the flue.
【図１】ボイラから発生する燃焼ガス中のダストの除塵
フローFIG. 1 Dust removal flow of dust in combustion gas generated from a boiler
【図２】図１に示す乾式電気集塵装置の構成を示す断面
図FIG. 2 is a cross-sectional view showing a configuration of the dry electric precipitator shown in FIG.
【図３】図２に示す分布板の構成を示す図FIG. 3 is a diagram showing a configuration of a distribution plate shown in FIG. 2;
【図４】横板にもパイプを取り付けた場合を示す図FIG. 4 is a diagram showing a case where a pipe is also attached to a horizontal plate.
【図５】パイプに角パイプを適用した場合を示す図FIG. 5 is a diagram showing a case where a square pipe is applied to a pipe;
【図６】図１に示す入口煙道の構成を示す斜視図FIG. 6 is a perspective view showing a configuration of an inlet flue shown in FIG. 1;
１０…分布板 １５…電子ビーム装置 １６…入口煙道 １７…乾式電気集塵装置 ２０…縦板 ２２…横板 ２４、３０、５０、５４…パイプ ２５…ポンプ ２６、４１…温度センサ ２８、４２…コントロール装置 ３２…通風路 ３４…ファン DESCRIPTION OF SYMBOLS 10 ... Distribution board 15 ... Electron beam device 16 ... Inlet flue 17 ... Dry electric precipitator 20 ... Vertical plate 22 ... Horizontal plate 24, 30, 50, 54 ... Pipe 25 ... Pump 26, 41 ... Temperature sensor 28, 42 ... Control device 32 ... Ventilation path 34 ... Fan
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D002 AA02 AA12 AB01 AC01 BA03 BA09 DA07 FA10 GA03 GB03 HA05 4D054 AA02 BA01 CA14 CA20 EA02 EA16 EA21 EA24 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D002 AA02 AA12 AB01 AC01 BA03 BA09 DA07 FA10 GA03 GB03 HA05 4D054 AA02 BA01 CA14 CA20 EA02 EA16 EA21 EA24
Claims (4)
にアンモニアを注入し電子ビームを照射することによっ
て発生した硫安や硝安の粒子を捕集する乾式電気集塵装
置において、 前記乾式電気集塵装置の入口側に設けられ、前記排ガス
を拡散させる分布板と、 前記分布板の表面温度が前記排ガス中に含まれる水蒸気
の露点以下になるように前記分布板を冷却する冷却手段
と、 を備えたことを特徴とする乾式電気集塵装置。1. A dry electrostatic precipitator for collecting particles of ammonium sulfate or ammonium nitrate generated by injecting ammonia into an exhaust gas containing sulfur oxides and nitrogen oxides and irradiating an electron beam, wherein the dry electric A distribution plate that is provided on the inlet side of the dust collector and diffuses the exhaust gas, and a cooling unit that cools the distribution plate so that a surface temperature of the distribution plate is equal to or lower than a dew point of water vapor included in the exhaust gas. A dry-type electrostatic precipitator comprising:
ねるパイプと、 前記パイプに冷媒を供給するポンプと、 前記分布板の表面温度を検出する温度検出手段と、 該検出温度が前記露点よりも高い場合は前記パイプ内の
冷媒の流量を多くし、該検出温度が前記露点よりも低い
場合は前記パイプ内の冷媒の流量を少なくするように前
記ポンプを制御する制御手段と、 を備えたことを特徴とする請求項１記載の乾式電気集塵
装置。2. The cooling means comprises: a pipe attached to the distribution plate or a pipe serving also as the distribution plate; a pump for supplying a refrigerant to the pipe; and a temperature detection unit for detecting a surface temperature of the distribution plate. When the detected temperature is higher than the dew point, the flow rate of the refrigerant in the pipe is increased, and when the detected temperature is lower than the dew point, the pump is controlled to reduce the flow rate of the refrigerant in the pipe. The dry electric precipitator according to claim 1, further comprising: a control unit configured to perform the control.
にアンモニアを注入し電子ビームを照射することによっ
て発生した硫安や硝安の粒子を含む排ガスを乾式電気集
塵装置に導く乾式電気集塵装置の煙道において、 前記煙道の表面温度が前記排ガス中に含まれる水蒸気の
露点以下になるように前記煙道を冷却する冷却手段を備
えたことを特徴とする乾式電気集塵装置の煙道。3. A dry electric precipitator for introducing an exhaust gas containing ammonium sulfate or ammonium nitrate particles generated by injecting ammonia into an exhaust gas containing sulfur oxides and nitrogen oxides and irradiating an electron beam to a dry electric precipitator. In a flue of a dust collector, a dry electric dust collector characterized by comprising cooling means for cooling the flue so that the surface temperature of the flue is equal to or lower than the dew point of water vapor contained in the exhaust gas. Flue.
路との間の空気の流量を多くし、該検出温度が前記露点
よりも低い場合は前記煙道と通風路との間の空気の流量
を少なくするように前記ファンを制御する制御装置と、 を備えたことを特徴とする請求項３記載の乾式電気集塵
装置の煙道。4. A cooling system comprising: a ventilation path surrounding an outer periphery of the flue; a fan for supplying air between the flue and the ventilation path; and a temperature detecting means for detecting a surface temperature of the flue. When the detected temperature is higher than the dew point, the flow rate of air between the flue and the ventilation path is increased, and when the detected temperature is lower than the dew point, the flow rate between the flue and the ventilation path is increased. The flue of the dry type dust collector according to claim 3, further comprising: a controller that controls the fan so as to reduce the flow rate of the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36300998A JP2000176308A (en) | 1998-12-21 | 1998-12-21 | Dry electric dust collector and flue thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36300998A JP2000176308A (en) | 1998-12-21 | 1998-12-21 | Dry electric dust collector and flue thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000176308A true JP2000176308A (en) | 2000-06-27 |
Family
ID=18478290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36300998A Pending JP2000176308A (en) | 1998-12-21 | 1998-12-21 | Dry electric dust collector and flue thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000176308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7638106B2 (en) | 2006-04-21 | 2009-12-29 | Edwards Limited | Method of treating a gas stream |
-
1998
- 1998-12-21 JP JP36300998A patent/JP2000176308A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7638106B2 (en) | 2006-04-21 | 2009-12-29 | Edwards Limited | Method of treating a gas stream |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0314072B1 (en) | Supercooling type mist eliminator apparatus | |
| US5176723A (en) | Condensation-growth particle scrubber | |
| JP3907255B2 (en) | Air washer | |
| US6110256A (en) | Apparatus and method for removing particulates and corrosive gases from a gas stream | |
| JPH0398614A (en) | Method and apparatus for purification of air, flue gas or the like | |
| US5282885A (en) | Electrostatic gas cleaning process and apparatus | |
| US5391220A (en) | Pollution control system and method of using same | |
| JPH07151476A (en) | Dry type scrubber and condensing heat exchanger for improving cycling efficiency | |
| EP0498020B1 (en) | Method and system for handling exhaust gas in a boiler | |
| CN109647121A (en) | A kind of gas cleaning disappears bletilla desulfurization wastewater process integrated system | |
| JP2000176308A (en) | Dry electric dust collector and flue thereof | |
| US5676715A (en) | Key advanced linear kinetic absorber system particulate arresting device | |
| CN1116917C (en) | Wet electron beam fume desulfurizing process | |
| JP2601633B2 (en) | Shower tunnel type exhaust purification system with wastewater regeneration capability | |
| CN109513270A (en) | Supersonic speed fume-dehydrating degranulation object separator | |
| JPS60156563A (en) | Waste gas treating apparatus | |
| KR102389530B1 (en) | Hybrid Dust Collector | |
| WO2008038348A1 (en) | Treating apparatus for exhaust gas containing sulfuric acid mist and treating method therefor | |
| WO1995018664A1 (en) | Method and apparatus for pollution control | |
| JP2002326015A (en) | Method and apparatus for treating waste gas | |
| JP2002250514A (en) | Exhaust gas disposer, and its operation method | |
| AU696223B2 (en) | Method and apparatus for pollution control | |
| JPH09155150A (en) | Dust removal forecast control | |
| JP2725784B2 (en) | Flue gas desulfurization method | |
| JP2942882B2 (en) | Dust collector |