JP5517675B2 - Drug spraying apparatus and drug spraying method - Google Patents

Drug spraying apparatus and drug spraying method Download PDF

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JP5517675B2
JP5517675B2 JP2010039416A JP2010039416A JP5517675B2 JP 5517675 B2 JP5517675 B2 JP 5517675B2 JP 2010039416 A JP2010039416 A JP 2010039416A JP 2010039416 A JP2010039416 A JP 2010039416A JP 5517675 B2 JP5517675 B2 JP 5517675B2
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JP2011173072A (en
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貴志 吉元
晴治 香川
立人 長安
展行 鵜飼
盛紀 村上
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Mitsubishi Heavy Industries Ltd
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本発明は、薬剤噴霧装置に関し、特に、排ガス処理システムにおいて排ガスに含まれるＮＯｘおよび水銀を除去するための薬剤を噴霧する薬剤噴霧装置および薬剤噴霧方法に関する。   The present invention relates to a drug spraying apparatus, and more particularly to a drug spraying apparatus and a drug spraying method for spraying a drug for removing NOx and mercury contained in exhaust gas in an exhaust gas treatment system.

従来、例えば、特許文献１には、石炭焚き排ガスや重質油燃焼排ガスなどの排ガスを処理する排ガス処理システムにおいて、排ガスに対してアルカリ吸収液（塩化アンモニウム水溶液など）の薬剤により排ガスに含まれる水銀（金属水銀または水銀化合物）を除去する排ガス処理装置が開示されている。   Conventionally, for example, in Patent Document 1, in an exhaust gas treatment system for treating exhaust gas such as coal-fired exhaust gas and heavy oil combustion exhaust gas, the exhaust gas is included in the exhaust gas by a chemical agent of an alkali absorbing liquid (such as an ammonium chloride aqueous solution). An exhaust gas treatment device for removing mercury (metal mercury or mercury compounds) is disclosed.

また、従来、例えば、特許文献２には、液体噴射口から噴射される液体を気流によって微粒化して微細霧を形成する二流体ノズルが開示されている。   Conventionally, for example, Patent Document 2 discloses a two-fluid nozzle that forms a fine mist by atomizing a liquid ejected from a liquid ejection port with an air flow.

特開平１０−２３０１３７号公報Japanese Patent Laid-Open No. 10-230137 特開２００７−１４４３９６号公報JP 2007-144396 A

上述した特許文献１の排ガス処理装置において、特許文献２に示すような二流体ノズルを適用し、薬剤液を微細霧として噴霧する薬剤噴霧装置を備えることが好ましい。しかし、排ガス処理装置では、３００℃〜３５０℃の高温の排ガスに対して薬剤を噴霧することになるため、当該温度環境下に置かれたノズル内での薬剤液の沸騰により薬剤（例えば、塩化アンモニウム水溶液）の固形成分がノズル内に析出することが問題となる。具体的には、析出した固形成分により二流体ノズルが詰まるおそれがある。しかも、析出した固形成分に排ガスの煤塵が付着すると、さらに二流体ノズルが詰まるおそれがある。   The above-described exhaust gas treatment apparatus of Patent Document 1 preferably includes a chemical spraying apparatus that applies a two-fluid nozzle as shown in Patent Document 2 and sprays a chemical liquid as a fine mist. However, in the exhaust gas treatment device, since the chemical is sprayed on the high-temperature exhaust gas of 300 ° C. to 350 ° C., the chemical (for example, chloride) is caused by boiling of the chemical liquid in the nozzle placed in the temperature environment. The problem is that the solid component of the aqueous ammonium solution is precipitated in the nozzle. Specifically, the two-fluid nozzle may be clogged with the precipitated solid component. Moreover, if exhaust gas dust adheres to the precipitated solid component, the two-fluid nozzle may be clogged.

本発明は上述した課題を解決するものであり、噴霧する薬剤液の固形成分の析出による二流体ノズルの詰まりを防止することのできる薬剤噴霧装置および薬剤噴霧方法を提供することを目的とする。   This invention solves the subject mentioned above, and it aims at providing the chemical | medical agent spraying apparatus and chemical | medical agent spraying method which can prevent clogging of the two fluid nozzle by precipitation of the solid component of the chemical | medical solution to spray.

上述の目的を達成するために、本発明の薬剤噴霧装置は、薬剤液を送る液配管と空気を送る空気配管とに接続されると共に、煙道内に配置され、前記液配管から供給された薬剤液を前記空気配管から供給された空気の気流によって微粒化することで微細霧を形成し前記煙道に噴霧する二流体ノズルを有した薬剤噴霧装置において、前記液配管に接続されて当該液配管に薬剤液を供給する薬剤液供給手段と、前記液配管に接続されて当該液配管に水を供給する水供給手段と、前記薬剤液供給手段から前記液配管への薬剤液の流通と前記水供給手段から前記液配管への水の流通とを選択的に切り換える液切換手段と、前記薬剤液供給手段における薬剤液の供給圧力を検出する圧力計と、前記液切換手段を前記薬剤液供給手段側に切り換えると共に前記薬剤液供給手段を駆動した状態で、前記圧力計で検出された圧力を入力し、入力した圧力が所定の閾値を超えた場合、前記液切換手段を前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止する制御手段と、を備えることを特徴とする。   In order to achieve the above-mentioned object, the medicine spraying device of the present invention is connected to a liquid pipe for sending a chemical liquid and an air pipe for sending air, and is arranged in a flue and supplied from the liquid pipe. In a drug spraying apparatus having a two-fluid nozzle that atomizes a liquid by atomizing an air stream supplied from the air pipe to form a fine mist and sprays it on the flue, the liquid pipe connected to the liquid pipe A chemical liquid supply means for supplying a chemical liquid to the liquid pipe, a water supply means connected to the liquid pipe for supplying water to the liquid pipe, a flow of the chemical liquid from the chemical liquid supply means to the liquid pipe, and the water Liquid switching means for selectively switching the flow of water from the supply means to the liquid piping, a pressure gauge for detecting the supply pressure of the chemical liquid in the chemical liquid supply means, and the liquid switching means for the chemical liquid supply means And switching to the side The pressure detected by the pressure gauge is input while the liquid medicine supply means is driven, and when the input pressure exceeds a predetermined threshold, the liquid switching means is switched to the water supply means side and the medicine is supplied. And a control means for stopping the driving of the liquid supply means.

この薬剤噴霧装置によれば、高温（例えば、３００℃〜３５０℃）の排ガスにより薬剤液が蒸発して固形成分が析出し始めても、薬剤液の供給量が低下したことを検出することで、液配管および二流体ノズルに水を供給する。この結果、噴霧する薬剤液の固形成分の析出による二流体ノズルの詰まりを防止できる。   According to this chemical spraying device, even when the chemical liquid evaporates due to high-temperature (for example, 300 ° C. to 350 ° C.) exhaust gas and solid components start to precipitate, by detecting that the supply amount of the chemical liquid has decreased, Water is supplied to the liquid piping and the two-fluid nozzle. As a result, it is possible to prevent clogging of the two-fluid nozzle due to the precipitation of the solid component of the chemical liquid to be sprayed.

また、本発明の薬剤噴霧装置では、前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、前記空気配管での空気の流通を開閉する空気開閉手段と、前記液配管での薬剤液または水の流通を開閉する液開閉手段と、を備え、前記制御手段は、前記薬剤液の供給を開始する場合、前記空気供給手段を駆動すると共に前記空気開閉手段を開状態とし、その後、前記液切換手段を前記薬剤液供給手段側に切り換え、かつ前記薬剤液供給手段を駆動すると共に前記液開閉手段を開状態とすることを特徴とする。   In the medicine spraying device of the present invention, an air supply means connected to the air pipe for supplying air to the air pipe, an air opening / closing means for opening / closing air flow in the air pipe, and the liquid pipe Liquid opening / closing means for opening and closing the flow of the chemical liquid or water, and when the supply of the chemical liquid is started, the control means drives the air supply means and opens the air opening / closing means, Thereafter, the liquid switching means is switched to the chemical liquid supply means side, the chemical liquid supply means is driven, and the liquid opening / closing means is opened.

この薬剤噴霧装置によれば、薬剤液の供給を開始するとき、二流体ノズルから空気を先に噴射させ、その後に薬剤液を噴射させる。この結果、先に噴射された空気により二流体ノズル内部が冷却されることから、噴霧する薬剤液の蒸発による固形成分の析出を防止でき、二流体ノズル内部の詰まりを防止できる。また、先に噴射された空気により、後に噴射される薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying device, when supply of the medicine liquid is started, air is first ejected from the two-fluid nozzle, and then the medicine liquid is ejected. As a result, since the inside of the two-fluid nozzle is cooled by the previously jetted air, it is possible to prevent precipitation of solid components due to evaporation of the sprayed drug solution, and it is possible to prevent clogging inside the two-fluid nozzle. In addition, since the chemical liquid to be ejected later is atomized by the previously ejected air, the chemical liquid does not remain at the ejection port of the two-fluid nozzle, so the dust in the exhaust gas to the ejection port of the two-fluid nozzle Can prevent clogging of the two-fluid nozzle.

また、本発明の薬剤噴霧装置では、前記制御手段は、前記薬剤液の供給を停止する場合、前記液切換手段を前記薬剤液供給手段側から前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記液開閉手段を閉状態とし、その後、前記空気開閉手段を閉状態とすると共に前記空気供給手段の駆動を停止することを特徴とする。   In the medicine spraying apparatus of the present invention, the control means switches the liquid switching means from the chemical liquid supply means side to the water supply means side when stopping the supply of the chemical liquid, and the chemical liquid supply means. Then, the liquid opening / closing means is closed, the air opening / closing means is then closed, and the driving of the air supply means is stopped.

この薬剤噴霧装置によれば、薬剤液の供給を停止するとき、二流体ノズルからの薬剤液の噴射を止めて水を噴射させ、その後、二流体ノズルからの水の噴射を先に止めた後に空気の噴射を止める。この結果、二流体ノズルを水で洗浄し、かつ洗浄後には空気で水分を飛ばして、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying device, when the supply of the medicine liquid is stopped, the medicine liquid from the two-fluid nozzle is stopped and water is injected, and then the water injection from the two-fluid nozzle is stopped first. Stop air injection. As a result, the two-fluid nozzle is washed with water, and after washing, moisture is blown away with air, so that no chemical liquid remains in the two-fluid nozzle nozzle. By preventing adhesion, clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧装置では、前記空気配管での空気の流通量を調整する空気量調整手段と、前記液配管での薬剤液の流通量を調整する液量調整手段と、を備え、前記制御手段は、前記煙道に流通する排ガスの流量増加に伴い、空気量調整手段により空気の流通量を増加させた後、液量調整手段により薬剤液の流通量を増加させることを特徴とする。   Further, the drug spraying apparatus of the present invention comprises an air amount adjusting means for adjusting the flow rate of air in the air pipe, and a liquid amount adjusting means for adjusting the flow rate of the drug solution in the liquid pipe, The control means increases the flow rate of the chemical liquid by the liquid volume adjusting means after increasing the flow volume of the air by the air volume adjusting means as the flow rate of the exhaust gas flowing through the flue increases. To do.

この薬剤噴霧装置によれば、排ガスの流量増加に伴い、薬剤液の噴霧量を増加させることができる。しかも、この薬剤噴霧装置によれば、薬剤液の噴霧量を増加させる場合、空気の流通量を増加させてから、薬剤液の流通量を増加させる。このため、先に流通量が増加された空気により、後に流通量が増加された薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this chemical spraying device, the spray amount of the chemical liquid can be increased with an increase in the flow rate of the exhaust gas. Moreover, according to this medicine spraying device, when increasing the spray amount of the drug solution, the flow rate of the drug solution is increased after increasing the flow rate of air. For this reason, since the drug liquid whose flow rate has been increased later is atomized by the air whose flow rate has been increased previously, the drug solution does not remain in the jet port of the two-fluid nozzle, so the jet of the two-fluid nozzle Prevents dust from adhering to the mouth and prevents clogging of the two-fluid nozzle.

また、本発明の薬剤噴霧装置では、前記制御手段は、前記排ガスの流量減少に伴い、液量調整手段により薬剤液の流通量を減少させた後、空気量調整手段により空気の流通量を減少させることを特徴とする。   In the medicine spraying apparatus of the present invention, the control means decreases the flow rate of the chemical liquid by the liquid volume adjusting means and then reduces the air flow volume by the air volume adjusting means as the exhaust gas flow rate decreases. It is characterized by making it.

この薬剤噴霧装置によれば、排ガスの流量減少に伴い、薬剤液の噴霧量を減少させることができる。しかも、この薬剤噴霧装置によれば、薬剤液の噴霧量を減少させる場合、薬剤液の流通量を減少させてから、空気の流通量を減少させる。このため、先に流通量が減少された薬剤液が、流通量が減少される前の空気により微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying device, the amount of sprayed medicine liquid can be reduced as the flow rate of exhaust gas decreases. Moreover, according to this medicine spraying device, when the spray amount of the drug solution is reduced, the flow rate of the drug solution is reduced, and then the flow rate of air is reduced. For this reason, since the drug solution whose flow rate has been reduced first is atomized by the air before the flow rate is reduced, the drug solution does not remain in the jet port of the two-fluid nozzle. By preventing the dust in the exhaust gas from adhering to the injection port, clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧装置では、前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、前記空気配管に接続されて当該空気配管に空気を供給する予備空気供給手段と、前記空気供給手段から前記空気配管への空気の流通と前記予備空気供給手段から前記空気配管への空気の流通とを選択的に切り換える空気切換手段と、前記空気配管における空気の流量を検出する空気流量計と、を備え、前記制御手段は、前記空気切換手段を空気供給手段側に切り換えている状態で、前記空気流量計で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、前記空気切換手段を前記予備空気供給手段側に切り換えることを特徴とする。   Further, in the medicine spraying apparatus of the present invention, an air supply means that is connected to the air pipe and supplies air to the air pipe, and a spare air supply means that is connected to the air pipe and supplies air to the air pipe; An air switching means for selectively switching between air flow from the air supply means to the air pipe and air flow from the spare air supply means to the air pipe; and detecting an air flow rate in the air pipe. An air flow meter, and the control means inputs a flow rate detected by the air flow meter in a state where the air switching means is switched to the air supply means side, and the input flow rate has a predetermined threshold value. When it falls below, the air switching means is switched to the spare air supply means side.

この薬剤噴霧装置によれば、空気供給手段による空気の送り量が減少した場合、予備空気供給手段に切り換えるため、予備空気供給手段の空気により、排ガス熱による二流体ノズル内部の薬剤液の蒸発を防止することから、析出した固形成分による二流体ノズル内部の詰まりを防止できる。また、予備空気供給手段の空気により薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying device, when the amount of air fed by the air supply means decreases, the medicine liquid inside the two-fluid nozzle is evaporated by the heat of the exhaust gas by the air of the spare air supply means in order to switch to the spare air supply means. Therefore, clogging inside the two-fluid nozzle due to the precipitated solid component can be prevented. In addition, since the chemical liquid is atomized by the air of the preliminary air supply means, the chemical liquid does not remain at the injection port of the two-fluid nozzle, so that the dust in the exhaust gas is prevented from adhering to the injection port of the two-fluid nozzle. The clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧装置では、前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、前記空気配管での空気の流通を開閉する空気開閉手段と、前記液配管での薬剤液または水の流通を開閉する液開閉手段と、前記空気配管における空気の流量を検出する空気流量計と、を備え、前記制御手段は、前記液開閉手段および前記空気開閉手段を開状態とし、前記空気流量計で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、前記液切換手段を前記薬剤液供給手段側から前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記液開閉手段を閉状態とした後、前記空気開閉手段を閉状態とすると共に前記空気供給手段の駆動を停止することを特徴とする。   In the medicine spraying device of the present invention, an air supply means connected to the air pipe for supplying air to the air pipe, an air opening / closing means for opening / closing air flow in the air pipe, and the liquid pipe Liquid opening / closing means for opening and closing the flow of the chemical liquid or water, and an air flow meter for detecting the flow rate of air in the air pipe, wherein the control means opens the liquid opening / closing means and the air opening / closing means. When the flow rate detected by the air flow meter is input and the input flow rate falls below a predetermined threshold, the liquid switching means is switched from the chemical liquid supply means side to the water supply means side and the chemical liquid The driving of the supply means is stopped, and then the liquid opening / closing means is closed, and then the air opening / closing means is closed and the driving of the air supply means is stopped.

この薬剤噴霧装置によれば、空気供給手段による空気の送り量が減少した場合、煙道への薬剤液の供給を停止し、水を供給させた後に空気を停止する。この結果、二流体ノズルを水で洗浄し、かつ洗浄後には空気で水分を飛ばすので、二流体ノズルの噴射口に薬剤液を残留させず、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying device, when the amount of air supplied by the air supply means decreases, the supply of the medicine liquid to the flue is stopped, and the air is stopped after water is supplied. As a result, since the two-fluid nozzle is washed with water and moisture is blown off with air after washing, the chemical liquid does not remain in the two-fluid nozzle nozzle, and the dust in the exhaust gas to the two-fluid nozzle nozzle is removed. By preventing adhesion, clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧装置では、前記液配管と前記空気配管とに接続されると共に、煙道内に配置され、前記液配管から供給された薬剤液を前記空気配管から供給された空気の気流によって微粒化することで微細霧を形成し前記煙道に噴霧する予備二流体ノズルと、前記二流体ノズルの前記液配管への接続と前記予備二流体ノズルの前記液配管への接続とを選択的に切り換えるノズル液切換手段と、前記二流体ノズルの前記空気配管への接続と前記予備二流体ノズルの前記空気配管への接続とを選択的に切り換えるノズル空気切換手段と、を備えることを特徴とする。   Moreover, in the chemical spraying apparatus of the present invention, the air current is supplied to the chemical liquid supplied from the air pipe and connected to the liquid pipe and the air pipe and arranged in the flue and supplied from the liquid pipe. A preliminary two-fluid nozzle that forms a fine mist by atomizing by means of spraying and spraying the flue, a connection of the two-fluid nozzle to the liquid pipe, and a connection of the preliminary two-fluid nozzle to the liquid pipe are selected. And a nozzle air switching means for selectively switching between the connection of the two-fluid nozzle to the air pipe and the connection of the spare two-fluid nozzle to the air pipe. And

この薬剤噴霧装置によれば、二流体ノズルの点検をする場合や二流体ノズルが万一詰まった場合でも、予備二流体ノズルを用いることで、薬剤液の噴霧を継続して行うことができ、排ガス処理システムの稼動に影響を与える事態を防止できる。   According to this medicine spraying device, even when the two-fluid nozzle is inspected or when the two-fluid nozzle is clogged, by using the spare two-fluid nozzle, spraying of the medicine liquid can be continuously performed. The situation that affects the operation of the exhaust gas treatment system can be prevented.

また、本発明の薬剤噴霧装置では、前記制御手段は、前記二流体ノズルと前記予備二流体ノズルとを切り換える場合、前記液切換手段を前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記ノズル空気切換手段を切り換えた後に前記ノズル液切換手段を切り換え、その後、前記液切換手段を前記薬剤液供給手段側に切り換えると共に前記薬剤液供給手段を駆動することを特徴とする。   In the medicine spraying apparatus of the present invention, when the control means switches between the two-fluid nozzle and the spare two-fluid nozzle, the liquid switching means is switched to the water supply means and the chemical liquid supply means is driven. After that, after switching the nozzle air switching means, the nozzle liquid switching means is switched, and then the liquid switching means is switched to the chemical liquid supply means side and the chemical liquid supply means is driven. And

この薬剤噴霧装置によれば、二流体ノズルを予備二流体ノズルに切り換える場合、二流体ノズルからの薬剤液の噴射を止めて水を噴射させ、その後、予備二流体ノズルには、空気を先に切り換えてから、水に切り換えつつ薬剤液に切り換える。この結果、切り換えられた予備二流体ノズルに対し、先に噴射された空気により予備二流体ノズル内部が冷却されることから、噴霧する薬剤液の蒸発による固形成分の析出を防止でき、予備二流体ノズル内部の詰まりを防止できる。また、先に噴射されている空気により、後に噴射される薬剤液が微粒化されることから、噴射口に薬剤液を残留させないので、噴射口への排ガス中の煤塵の付着を防いで、詰まりを防止できる。しかも、薬剤液が供給される前に水が供給されるので、使用前に予備二流体ノズルを洗浄できる。   According to this medicine spraying apparatus, when the two-fluid nozzle is switched to the spare two-fluid nozzle, the medicine liquid from the two-fluid nozzle is stopped and water is jetted, and then the spare two-fluid nozzle is supplied with air first. After switching, switch to drug solution while switching to water. As a result, since the inside of the preliminary two-fluid nozzle is cooled by the previously jetted air with respect to the switched preliminary two-fluid nozzle, it is possible to prevent the precipitation of solid components due to evaporation of the sprayed chemical liquid. The clogging inside the nozzle can be prevented. In addition, since the chemical liquid to be ejected later is atomized by the air that has been previously ejected, the chemical liquid does not remain in the ejection port, so that the adhesion of dust in the exhaust gas to the ejection port is prevented and clogging occurs. Can be prevented. In addition, since the water is supplied before the chemical liquid is supplied, the spare two-fluid nozzle can be cleaned before use.

また、本発明の薬剤噴霧装置では、前記煙道には、その内部空間に連通する一方で前記内部空間から隔離される外部空間をなす外部空間形成部を備え、少なくとも前記二流体ノズルが前記外部空間形成部に配置されていることを特徴とする。   In the medicine spraying device of the present invention, the flue is provided with an external space forming portion that communicates with the internal space and forms an external space that is isolated from the internal space, and at least the two-fluid nozzle is provided in the external space. It is arrange | positioned at the space formation part, It is characterized by the above-mentioned.

この薬剤噴霧装置によれば、煙道の内部空間を開放させずに排ガス処理システムの稼動中であっても二流体ノズルや予備二流体ノズルの取り付けおよび取り外しを行うことができるので、排ガス処理システムの稼動に影響を与える事態を防止できる。   According to this chemical spraying apparatus, the two-fluid nozzle and the spare two-fluid nozzle can be attached and detached even when the exhaust gas treatment system is in operation without opening the internal space of the flue. The situation that affects the operation of can be prevented.

上述の目的を達成するために、本発明の薬剤噴霧方法は、二流体ノズルにより薬剤液を空気の気流によって微粒化することで微細霧を形成し煙道に噴霧する薬剤噴霧方法において、薬剤液を噴霧させた状態で、前記二流体ノズルに供給する薬剤液の供給圧力が所定の閾値を超えた場合、前記薬剤液を水に切り換えて噴射させることを特徴とする。   In order to achieve the above-mentioned object, the drug spraying method of the present invention is a drug spraying method in which a fine mist is formed by atomizing a drug liquid by a stream of air by a two-fluid nozzle and sprayed on a flue. When the supply pressure of the chemical liquid supplied to the two-fluid nozzle exceeds a predetermined threshold in a state where the liquid is sprayed, the chemical liquid is switched to water and sprayed.

この薬剤噴霧方法によれば、高温（例えば、３００℃〜３５０℃）の排ガスにより薬剤液が蒸発して固形成分が析出し始めても、薬剤液を水に切り換えて二流体ノズルに水を供給することで、二流体ノズルの詰まりを防止できる。   According to this chemical spraying method, even if the chemical liquid evaporates due to high-temperature (for example, 300 ° C. to 350 ° C.) exhaust gas and solid components start to precipitate, the chemical liquid is switched to water and water is supplied to the two-fluid nozzle. Thus, clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧方法では、前記二流体ノズルに薬剤液の供給を開始する場合、空気を供給した後に、薬剤液を供給することを特徴とする。   Moreover, in the chemical spraying method of the present invention, when the supply of the chemical liquid to the two-fluid nozzle is started, the chemical liquid is supplied after supplying air.

この薬剤噴霧方法によれば、先に噴射された空気により二流体ノズル内部が冷却されることから、噴霧する薬剤液の蒸発による固形成分の析出を防止でき、二流体ノズル内部の詰まりを防止できる。また、先に噴射された空気により、後に噴射される薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, the inside of the two-fluid nozzle is cooled by the previously jetted air, so that precipitation of solid components due to evaporation of the medicine liquid to be sprayed can be prevented, and clogging inside the two-fluid nozzle can be prevented. . In addition, since the chemical liquid to be ejected later is atomized by the previously ejected air, the chemical liquid does not remain at the ejection port of the two-fluid nozzle, so the dust in the exhaust gas to the ejection port of the two-fluid nozzle Can prevent clogging of the two-fluid nozzle.

また、本発明の薬剤噴霧方法では、前記二流体ノズルへの薬剤液の供給を停止する場合、薬剤液を水に切り換え、その後、水の供給を止めた後、空気の供給を止めることを特徴とする。   Further, in the medicine spraying method of the present invention, when the supply of the medicine liquid to the two-fluid nozzle is stopped, the medicine liquid is switched to water, and then the supply of air is stopped after the water supply is stopped. And

この薬剤噴霧方法によれば、二流体ノズルを水で洗浄し、かつ洗浄後には空気で水分を飛ばして、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, the two-fluid nozzle is washed with water, and after washing, moisture is blown off with air, so that no chemical liquid remains in the jet nozzle of the two-fluid nozzle. It prevents dust from adhering to the exhaust gas and prevents clogging of the two-fluid nozzle.

また、本発明の薬剤噴霧方法では、前記煙道に流通する排ガスの流量増加に伴い、空気の流通量を増加させた後、薬剤液の流通量を増加させることを特徴とする。   Moreover, in the chemical spraying method of the present invention, the flow rate of the chemical liquid is increased after the flow rate of air is increased with an increase in the flow rate of the exhaust gas flowing through the flue.

この薬剤噴霧方法によれば、先に流通量が増加された空気により、後に流通量が増加された薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, since the drug liquid whose flow volume has been increased later is atomized by the air whose flow volume has been increased previously, the drug liquid does not remain in the injection port of the two-fluid nozzle. By preventing the dust in the exhaust gas from adhering to the injection port of the two-fluid nozzle, clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧方法では、前記煙道に流通する排ガスの流量減少に伴い、薬剤液の流通量を減少させた後、空気の流通量を減少させることを特徴とする。   Moreover, the chemical spraying method of the present invention is characterized in that the flow rate of the air is reduced after the flow rate of the chemical liquid is reduced with a decrease in the flow rate of the exhaust gas flowing through the flue.

この薬剤噴霧方法によれば、先に流通量が減少された薬剤液が、流通量が減少される前の空気により微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, since the medicine liquid whose flow volume has been reduced is atomized by the air before the flow quantity is reduced, the liquid medicine does not remain in the injection port of the two-fluid nozzle. It is possible to prevent clogging of the two-fluid nozzle by preventing the dust in the exhaust gas from adhering to the injection port of the two-fluid nozzle.

また、本発明の薬剤噴霧方法では、前記二流体ノズルに空気を供給する予備空気供給手段を有し、前記二流体ノズルに供給する空気の流量が所定の閾値を下回った場合、前記予備空気供給手段に切り換えることを特徴とする。   Further, in the medicine spraying method of the present invention, when the flow rate of the air supplied to the two-fluid nozzle falls below a predetermined threshold value, the auxiliary air supply means for supplying air to the two-fluid nozzle is provided. It is characterized by switching to the means.

この薬剤噴霧方法によれば、予備空気供給手段の空気により、二流体ノズル内部が冷却されることから、噴霧する薬剤液の蒸発による固形成分の析出を防止でき、二流体ノズル内部の詰まりを防止できる。また、予備空気供給手段の空気により薬剤液が微粒化されることから、二流体ノズルの噴射口に薬剤液を残留させないので、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, the inside of the two-fluid nozzle is cooled by the air of the auxiliary air supply means, so that precipitation of solid components due to evaporation of the medicine liquid to be sprayed can be prevented, and clogging inside the two-fluid nozzle is prevented. it can. In addition, since the chemical liquid is atomized by the air of the preliminary air supply means, the chemical liquid does not remain at the injection port of the two-fluid nozzle, so that the dust in the exhaust gas is prevented from adhering to the injection port of the two-fluid nozzle. The clogging of the two-fluid nozzle can be prevented.

また、本発明の薬剤噴霧方法では、前記二流体ノズルに供給する空気の流量が所定の閾値を下回った場合、薬剤液を水に切り換え、その後、水の供給を止めた後、空気の供給を止めることを特徴とする。   In the medicine spraying method of the present invention, when the flow rate of air supplied to the two-fluid nozzle is below a predetermined threshold, the medicine liquid is switched to water, and then the supply of air is stopped after the water supply is stopped. It is characterized by stopping.

この薬剤噴霧方法によれば、二流体ノズルを水で洗浄し、かつ洗浄後には空気で水分を飛ばすので、二流体ノズルの噴射口に薬剤液を残留させず、二流体ノズルの噴射口への排ガス中の煤塵の付着を防いで、二流体ノズルの詰まりを防止できる。   According to this medicine spraying method, the two-fluid nozzle is washed with water, and moisture is blown off with air after washing. Therefore, the medicine liquid does not remain in the jet nozzle of the two-fluid nozzle, and the two-fluid nozzle jet is supplied to the jet nozzle. It prevents dust from adhering to the exhaust gas and prevents clogging of the two-fluid nozzle.

また、本発明の薬剤噴霧方法では、予備二流体ノズルを有し、前記二流体ノズルと前記予備二流体ノズルとを切り換える場合、薬剤液を水に切り換え、その後、前記二流体ノズルと前記予備二流体ノズルとを切り換え、その後、水を薬剤液に切り換えることを特徴とする。   In the medicine spraying method of the present invention, a preliminary two-fluid nozzle is provided, and when the two-fluid nozzle and the preliminary two-fluid nozzle are switched, the chemical liquid is switched to water, and then the two-fluid nozzle and the preliminary two-fluid nozzle are switched. The fluid nozzle is switched, and then water is switched to the chemical liquid.

この薬剤噴霧方法によれば、切り換えられたノズルに対し、先に噴射された空気により予備二流体ノズル内部が冷却されることから、噴霧する薬剤液の蒸発による固形成分の析出を防止でき、予備二流体ノズル内部の詰まりを防止できる。また、先に噴射されている空気により、後に噴射される薬剤液が微粒化されることから、噴射口に薬剤液を残留させないので、噴射口への排ガス中の煤塵の付着を防いで、詰まりを防止できる。しかも、薬剤液が供給される前に水が供給されるので、使用前に予備二流体ノズルを洗浄できる。   According to this medicine spraying method, since the inside of the spare two-fluid nozzle is cooled by the previously jetted air with respect to the switched nozzle, it is possible to prevent the precipitation of solid components due to evaporation of the medicine liquid to be sprayed. Clogging inside the two-fluid nozzle can be prevented. In addition, since the chemical liquid to be ejected later is atomized by the air that has been previously ejected, the chemical liquid does not remain in the ejection port, so that the adhesion of dust in the exhaust gas to the ejection port is prevented and clogging occurs. Can be prevented. In addition, since the water is supplied before the chemical liquid is supplied, the spare two-fluid nozzle can be cleaned before use.

本発明によれば、噴霧する薬剤液の固形成分の析出による二流体ノズルの詰まりを防止することができる。   According to the present invention, it is possible to prevent clogging of the two-fluid nozzle due to precipitation of solid components of the chemical liquid to be sprayed.

図１は、本発明の実施の形態に係る薬剤噴霧装置が適用される排ガス処理システムの概略図である。FIG. 1 is a schematic diagram of an exhaust gas treatment system to which a drug spraying apparatus according to an embodiment of the present invention is applied. 図２は、本発明の実施の形態に係る薬剤噴霧装置の概略図である。FIG. 2 is a schematic diagram of the drug spraying apparatus according to the embodiment of the present invention. 図３は、二流体ノズルの概略図である。FIG. 3 is a schematic view of a two-fluid nozzle. 図４は、図３におけるα−α断面図である。4 is an α-α cross-sectional view in FIG. 図５は、図３に示す二流体ノズルを煙道から取り外す概略図である。FIG. 5 is a schematic view of removing the two-fluid nozzle shown in FIG. 3 from the flue. 図６は、制御手段の動作を示すフローチャートである。FIG. 6 is a flowchart showing the operation of the control means. 図７は、制御手段の動作を示すフローチャートである。FIG. 7 is a flowchart showing the operation of the control means. 図８は、制御手段の動作を示すフローチャートである。FIG. 8 is a flowchart showing the operation of the control means. 図９は、制御手段の動作を示すフローチャートである。FIG. 9 is a flowchart showing the operation of the control means. 図１０は、制御手段の動作を示すフローチャートである。FIG. 10 is a flowchart showing the operation of the control means. 図１１は、制御手段の動作を示すフローチャートである。FIG. 11 is a flowchart showing the operation of the control means. 図１２は、排ガス流量に応じた薬剤液噴霧量制御を示すグラフである。FIG. 12 is a graph showing chemical liquid spray amount control according to the exhaust gas flow rate. 図１３は、制御手段の動作を示すフローチャートである。FIG. 13 is a flowchart showing the operation of the control means. 図１４は、制御手段の動作を示すフローチャートである。作用を示す概略図である。FIG. 14 is a flowchart showing the operation of the control means. It is the schematic which shows an effect | action.

以下に、本発明に係る実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。また、下記実施の形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。   Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

本実施の形態について、図面を参照して説明する。図１は、薬剤噴霧装置が適用される排ガス処理システムの概略図である。   The present embodiment will be described with reference to the drawings. FIG. 1 is a schematic diagram of an exhaust gas treatment system to which a chemical spraying device is applied.

図１に示すように、排ガス処理システム１００は、発電プラントや工場などのボイラ１０１から排出される排ガスＧが煙道１０２を通過し煙突１０３から放出される過程で、当該排ガスＧに含まれる水銀（金属水銀（Ｈｇ０）や水銀化合物）、窒素酸化物（ＮＯｘ）、煤塵、および硫黄酸化物（ＳＯｘ）を除去するものである。 As shown in FIG. 1, the exhaust gas treatment system 100 includes mercury contained in the exhaust gas G in a process in which the exhaust gas G discharged from the boiler 101 such as a power plant or factory passes through the flue 102 and is discharged from the chimney 103. (Metal mercury (Hg 0 ) and mercury compounds), nitrogen oxides (NOx), dust, and sulfur oxides (SOx) are removed.

具体的には、ボイラ１０１直後の煙道１０２に、薬剤噴霧装置１０４により薬剤液としての塩化アンモニウム（ＮＨ４Ｃｌ）水溶液を噴霧する。噴霧された薬剤液は、ＮＨ３ガスとＨＣｌガスとして還元脱硝装置１０５に送られる。ＮＨ3ガスは、還元脱硝装置１０５の脱硝触媒１０５ａ上で排ガスＧに含まれる窒素酸化物（ＮＯｘ）を還元脱硝し（下記式（１）参照）、ＨＣｌガスは、還元脱硝装置１０５の水銀酸化触媒１０５ｂ上で排ガスＧに含まれる水銀（主に金属水銀（Ｈｇ０））を水銀酸化する（下記式（２）参照）。
４ＮＯ＋４ＮＨ３＋Ｏ２ → ４Ｎ２＋６Ｈ２Ｏ・・・（１）
Ｈｇ＋１／２Ｏ２＋２ＨＣｌ → ＨｇＣｌ２＋Ｈ２Ｏ・・・（２） Specifically, an aqueous solution of ammonium chloride (NH 4 Cl) as a chemical solution is sprayed onto the flue 102 immediately after the boiler 101 by the chemical spray device 104. The sprayed chemical liquid is sent to the reducing denitration apparatus 105 as NH 3 gas and HCl gas. NH 3 gas performs reductive denitration of nitrogen oxide (NOx) contained in the exhaust gas G on the denitration catalyst 105 a of the reductive denitration device 105 (see the following formula (1)), and HCl gas is mercury oxidation of the reductive denitration device 105. Mercury (mainly metallic mercury (Hg 0 )) contained in the exhaust gas G is oxidized with mercury on the catalyst 105b (see the following formula (2)).
4NO + 4NH 3 + O 2 → 4N 2 + 6H 2 O (1)
Hg + 1 / 2O 2 + 2HCl → HgCl 2 + H 2 O (2)

還元脱硝装置１０５において窒素酸化物の還元と水銀の酸化がされた排ガスＧは、さらに煙道１０２を通過し、ボイラ１０１に供給される燃焼用空気Ａａと熱交換器１０６により熱交換され、続いて、電気集塵機１０７により煤塵を除去された後、脱硫装置１０８に送られる。脱硫装置１０８は、湿式脱硫装置として構成されており、先に水銀酸化された排ガスＧ中のＨｇＣｌ２は脱硫装置の石灰石膏スラリー中の水分に溶解し、硫黄酸化物は石灰石膏スラリー中に吸収され、排ガスＧから分離して除去される。排ガスＧは、このようにして浄化され、煙突１０３から放出される。 The exhaust gas G that has undergone reduction of nitrogen oxides and oxidation of mercury in the reductive denitration device 105 further passes through the flue 102 and is heat-exchanged with the combustion air Aa supplied to the boiler 101 by the heat exchanger 106, and then After the dust is removed by the electrostatic precipitator 107, the dust is sent to the desulfurizer 108. The desulfurization device 108 is configured as a wet desulfurization device, and HgCl 2 in the exhaust gas G previously oxidized with mercury is dissolved in moisture in the lime gypsum slurry of the desulfurization device, and sulfur oxide is absorbed in the lime gypsum slurry. And separated from the exhaust gas G and removed. The exhaust gas G is purified in this way and is emitted from the chimney 103.

上述の薬剤噴霧装置１０４について図を参照して説明する。図２は、薬剤噴霧装置を示し、図３〜図５は、二流体ノズルを示す。   The above-described drug spraying device 104 will be described with reference to the drawings. FIG. 2 shows a medicine spraying device, and FIGS. 3 to 5 show a two-fluid nozzle.

図２に示すように、薬剤噴霧装置１０４は、薬剤液Ｄを送る液配管１と、空気Ａｂを送る空気配管２とを有している。液配管１および空気配管２は、二流体ノズル３に接続されている。   As shown in FIG. 2, the drug spraying device 104 includes a liquid pipe 1 that sends the drug liquid D and an air pipe 2 that sends the air Ab. The liquid pipe 1 and the air pipe 2 are connected to the two-fluid nozzle 3.

二流体ノズル３は、排ガス処理システム１００の煙道１０２内に配置され、液配管１から供給された薬剤液Ｄを、空気配管２から供給された空気Ａｂの気流によって微粒化することで薬剤液Ｄの微細霧を形成し煙道１０２に噴霧するものである。図３に示すように、本実施の形態の二流体ノズル３は、二重管構造に形成されており、内側の内管３ａの基端に液配管１が接続され、外側の外管３ｂの基端に空気配管２が接続されている。そして、内管３ａの先端部から薬剤液Ｄが噴射されると共に、外管３ｂの先端部から空気Ａｂが噴射され、空気Ａｂの気流により薬剤液Ｄが微細霧となる。なお、二流体ノズル３は、液配管１から供給された薬剤液Ｄを、空気配管２から供給された空気Ａｂの気流によって微粒化することで薬剤液Ｄの微細霧を形成し煙道１０２に噴霧するものであれば、二重管構造に限定されるものではない。   The two-fluid nozzle 3 is disposed in the flue 102 of the exhaust gas treatment system 100, and the drug liquid D supplied from the liquid pipe 1 is atomized by the air flow of the air Ab supplied from the air pipe 2 to thereby generate the drug liquid. A fine mist of D is formed and sprayed onto the flue 102. As shown in FIG. 3, the two-fluid nozzle 3 of the present embodiment is formed in a double pipe structure, the liquid pipe 1 is connected to the proximal end of the inner inner pipe 3a, and the outer outer pipe 3b An air pipe 2 is connected to the proximal end. And while the chemical | medical solution D is injected from the front-end | tip part of the inner tube | pipe 3a, air Ab is injected from the front-end | tip part of the outer tube | pipe 3b, and the chemical | medical solution D turns into a fine mist with the airflow of the air Ab. The two-fluid nozzle 3 atomizes the drug liquid D supplied from the liquid pipe 1 with the air flow of the air Ab supplied from the air pipe 2 to form a fine mist of the drug liquid D in the flue 102. If it sprays, it will not be limited to a double tube structure.

二流体ノズル３は、排ガスＧが通過する煙道１０２の内部空間Ｓに連通される一方で内部空間Ｓから隔離される外部空間をなす外部空間形成部４に配置されている。外部空間形成部４は、煙道１０２の外側に基端が固定されて煙道１０２の内部空間Ｓに連通すると共に先端が開口する固定筒４ａと、固定筒４ａの基端と先端との間を開放する一方で固定部４ａの基端と先端との間を閉塞する態様で固定筒４ａの外部からハンドル４ｂにより回転操作される弁４ｃと、固定筒４ａの先端の開口に基端がボルト４ｄにより着脱可能に取り付けられ、自身の先端において二流体ノズル３を気密性を有しつつ煙道１０２の内外に移動可能に支持する支持筒４ｅと、支持筒４ｅの先端にボルト４ｆによって二流体ノズル３を固定する固定部４ｇとを備えている。   The two-fluid nozzle 3 is disposed in an external space forming portion 4 that forms an external space that is in communication with the internal space S of the flue 102 through which the exhaust gas G passes and that is isolated from the internal space S. The outer space forming portion 4 has a base end fixed to the outside of the flue 102 and communicates with the internal space S of the flue 102, and has a fixed cylinder 4a whose front end is open, and between the base end and the front end of the fixed cylinder 4a. A valve 4c that is rotated by a handle 4b from the outside of the fixed cylinder 4a in a manner that closes between the base end and the distal end of the fixed portion 4a while the base end is bolted to the opening of the distal end of the fixed cylinder 4a. A support cylinder 4e that is detachably attached by 4d and supports the two-fluid nozzle 3 movably in and out of the flue 102 at its tip, and a two-fluid by a bolt 4f at the tip of the support cylinder 4e. A fixing portion 4g for fixing the nozzle 3 is provided.

図４（ａ）に示すように、二流体ノズル３は、円筒状の固定管４ａの内部にオフセットされて設けられ、弁４ｃは、ハンドル４ｂを回転させることで、図４（ｂ）に示すように全周が固定管４ａの内面に接触して固定管４ａの先端と基端との間を二分して閉塞させる閉塞状態となる一方で、図４（ａ）に示すように固定管４ａの先端と基端との間を開放させる開放状態となる。   As shown in FIG. 4 (a), the two-fluid nozzle 3 is offset in the cylindrical fixed tube 4a, and the valve 4c rotates the handle 4b, so that it is shown in FIG. 4 (b). As shown in FIG. 4 (a), the entire circumference contacts with the inner surface of the fixed tube 4a so as to divide the gap between the distal end and the proximal end of the fixed tube 4a. It will be in the open state which open | releases between the front-end | tip and base end of.

この外部空間形成部４は、煙道１０２の内部空間Ｓをその外部に通じさせることなく二流体ノズル３の煙道１０２への取り付けまたは取り外しを可能とするものである。図３および図４（ａ）は、二流体ノズル３を煙道１０２に取り付けた状態である。この状態から二流体ノズル３を外すには、図５（ａ）に示すように、二流体ノズル３を液配管１および空気配管２から分離させる。その後、固定部４ｇを支持筒４ｅから外し、二流体ノズル３を支持筒４ｅを介して煙道１０２の外側に移動させた後、図４（ｂ）に示すように、ハンドル４ｂを回して弁４ｃを閉鎖状態とする。次に、図５（ｂ）に示すように、支持筒４ｅを固定筒４ａから外すことで、二流体ノズル３が煙道１０２から取り外される。また、二流体ノズル３を煙道１０２に取り付けるには、上記手順を逆に行えばよい。   The external space forming unit 4 enables the two-fluid nozzle 3 to be attached to or removed from the flue 102 without allowing the internal space S of the flue 102 to communicate with the outside. FIG. 3 and FIG. 4A show a state in which the two-fluid nozzle 3 is attached to the flue 102. To remove the two-fluid nozzle 3 from this state, the two-fluid nozzle 3 is separated from the liquid pipe 1 and the air pipe 2 as shown in FIG. Thereafter, the fixing portion 4g is removed from the support cylinder 4e, and the two-fluid nozzle 3 is moved to the outside of the flue 102 via the support cylinder 4e. Then, as shown in FIG. 4c is closed. Next, as shown in FIG. 5B, the two-fluid nozzle 3 is removed from the flue 102 by removing the support cylinder 4e from the fixed cylinder 4a. In order to attach the two-fluid nozzle 3 to the flue 102, the above procedure may be reversed.

また、図２に示すように、薬剤噴霧装置１０４は、液配管１に薬剤液供給手段５が接続されている。薬剤液供給手段５は、薬剤液Ｄが貯留される薬剤液タンク５ａと、薬剤液タンク５ａと液配管１との間を接続する薬剤液配管５ｂと、薬剤液配管５ｂに設けられて薬剤液配管５ｂを介して薬剤液タンク５ａに貯留された薬剤液Ｄを液配管１に送る薬剤液ポンプ５ｃと、薬剤液ポンプ５ｃによる薬剤液Ｄの供給圧力を検出する圧力計５ｄとを有している。   Further, as shown in FIG. 2, the drug spraying device 104 has a drug solution supply means 5 connected to the liquid pipe 1. The drug solution supply means 5 is provided in the drug solution tank 5a storing the drug solution D, the drug solution pipe 5b connecting the drug solution tank 5a and the solution pipe 1, and the drug solution pipe 5b. It has a drug solution pump 5c that sends the drug solution D stored in the drug solution tank 5a via the pipe 5b to the solution pipe 1, and a pressure gauge 5d that detects the supply pressure of the drug solution D by the drug solution pump 5c. Yes.

また、薬剤噴霧装置１０４は、液配管１に水供給手段６が接続されている。水供給手段６は、水源６ａと、水源６ａと液配管１との間を接続する水配管６ｂとを有している。なお、水源６ａは、一般水道である場合、水道圧力を利用して水Ｗを液配管１に送ることが可能であるが、水が貯留されるタンクである場合では、水配管６ｂに水ポンプ（図示せず）を設ければよい。また、高圧で水を送る場合は、水源６ａとして消火栓を利用してもよい。   Further, in the medicine spraying device 104, the water supply means 6 is connected to the liquid pipe 1. The water supply means 6 has a water source 6 a and a water pipe 6 b that connects the water source 6 a and the liquid pipe 1. In addition, when the water source 6a is a general water supply, it is possible to send the water W to the liquid piping 1 using a water supply pressure, but when it is a tank in which water is stored, a water pump is connected to the water piping 6b. (Not shown) may be provided. Moreover, when sending water at a high pressure, a fire hydrant may be used as the water source 6a.

また、薬剤噴霧装置１０４は、液切換手段７が設けられている。液切換手段７は、薬剤液供給手段５から液配管１への薬剤液Ｄの流通と、水供給手段６から液配管１への水Ｗの流通とを選択的に切り換えるもので、液配管１と薬剤液配管５ｂと水配管６ｂとが合流する部分に設けられた切換弁として構成されている。なお、液切換手段７は、前記切換弁に代えて、薬剤液配管５ｂと水配管６ｂとにそれぞれ開閉弁を設けてもよい。   The drug spraying device 104 is provided with a liquid switching means 7. The liquid switching means 7 selectively switches between the flow of the chemical liquid D from the chemical liquid supply means 5 to the liquid pipe 1 and the flow of the water W from the water supply means 6 to the liquid pipe 1. And a switching valve provided at a portion where the chemical liquid pipe 5b and the water pipe 6b merge. The liquid switching means 7 may be provided with opening / closing valves in the chemical liquid pipe 5b and the water pipe 6b, respectively, instead of the switching valve.

また、薬剤噴霧装置１０４は、液配管１に液開閉手段８が設けられている。液開閉手段８は、液配管１での薬剤液Ｄまたは水Ｗの流通を開閉するもので、開閉弁として構成されている。   Further, the drug spraying device 104 is provided with a liquid opening / closing means 8 in the liquid pipe 1. The liquid opening / closing means 8 opens and closes the flow of the chemical liquid D or the water W in the liquid pipe 1 and is configured as an opening / closing valve.

また、薬剤噴霧装置１０４は、液配管１に液量調整手段９が設けられている。液量調整手段９は、液配管１での薬剤液Ｄまたは水Ｗの流通量を調整するもので、流量調整弁として構成されている。なお、流量調整弁の最大絞りを流量０とすることで、液量調整手段９を液開閉手段８として構成できる。本実施の形態では、図２において液開閉手段８と液量調整手段９とを共に示す。   Further, the medicine spraying device 104 is provided with the liquid amount adjusting means 9 in the liquid pipe 1. The liquid amount adjusting means 9 adjusts the flow rate of the drug solution D or water W in the liquid pipe 1 and is configured as a flow rate adjusting valve. The liquid amount adjusting means 9 can be configured as the liquid opening / closing means 8 by setting the maximum throttle of the flow rate adjusting valve to 0. In the present embodiment, the liquid opening / closing means 8 and the liquid amount adjusting means 9 are shown together in FIG.

また、薬剤噴霧装置１０４は、空気配管２に空気供給手段１０が接続されている。空気供給手段１０は、送風機１０ａと、送風機１０ａと空気配管２との間を接続する送気配管１０ｂとを有し、空気配管２に空気Ａｂを供給する。   Further, in the medicine spraying device 104, the air supply means 10 is connected to the air pipe 2. The air supply means 10 includes a blower 10 a and an air supply pipe 10 b that connects the blower 10 a and the air pipe 2, and supplies air Ab to the air pipe 2.

また、薬剤噴霧装置１０４は、空気配管２に予備空気供給手段１１が接続されている。予備空気供給手段１１は、予備送風機１１ａと、予備送風機１１ａと空気配管２との間を接続する送気配管１１ｂとを有し、空気配管２に空気Ａｃを供給する。なお、予備空気供給手段１１の予備送風機１１ａは、排ガス処理システム１００において、ボイラ１０１に燃焼用空気Ａａを送る送風機１０９（図１参照）など、既設の送風機を利用してもよい。   Further, in the medicine spraying device 104, the preliminary air supply means 11 is connected to the air pipe 2. The preliminary air supply means 11 includes a preliminary blower 11 a and an air supply pipe 11 b that connects between the preliminary blower 11 a and the air pipe 2, and supplies air Ac to the air pipe 2. Note that the preliminary blower 11 a of the preliminary air supply unit 11 may use an existing blower such as the blower 109 (see FIG. 1) that sends the combustion air Aa to the boiler 101 in the exhaust gas treatment system 100.

また、薬剤噴霧装置１０４は、空気切換手段１２が設けられている。空気切換手段１２は、空気供給手段１０から空気配管２への空気Ａｂの流通と、予備空気供給手段１１から空気配管２への空気Ａｃの流通とを選択的に切り換えるもので、空気配管２と送気配管１０ｂと送気配管１１ｂとが合流する部分に設けられた切換弁として構成されている。なお、空気切換手段１２は、前記切換弁に代えて、送気配管１０ｂと送気配管１１ｂとにそれぞれ開閉弁を設けてもよい。   Further, the medicine spraying device 104 is provided with air switching means 12. The air switching means 12 selectively switches between the flow of the air Ab from the air supply means 10 to the air pipe 2 and the flow of the air Ac from the backup air supply means 11 to the air pipe 2. It is configured as a switching valve provided at a portion where the air supply pipe 10b and the air supply pipe 11b merge. The air switching means 12 may be provided with opening / closing valves in the air supply pipe 10b and the air supply pipe 11b, respectively, instead of the switching valve.

また、薬剤噴霧装置１０４は、空気配管２に空気開閉手段１３が設けられている。空気開閉手段１３は、空気配管２での空気Ａｂ，Ａｃの流通を開閉するもので、開閉弁として構成されている。   Further, the medicine spraying device 104 is provided with an air opening / closing means 13 in the air pipe 2. The air opening / closing means 13 opens and closes the flow of the air Ab, Ac in the air pipe 2 and is configured as an opening / closing valve.

また、薬剤噴霧装置１０４は、空気配管２に空気量調整手段１４が設けられている。空気量調整手段１４は、空気配管２での空気Ａｂ，Ａｃの流通量を調整するもので、流量調整弁として構成されている。なお、流量調整弁の最大絞りを流量０とすることで、空気量調整手段１４を空気開閉手段１３として構成できる。本実施の形態では、図２において空気開閉手段１３と空気量調整手段１４とを共に示す。   Further, the drug spraying device 104 is provided with an air amount adjusting means 14 in the air pipe 2. The air amount adjusting means 14 adjusts the flow amount of the air Ab, Ac in the air pipe 2 and is configured as a flow rate adjusting valve. The air amount adjusting means 14 can be configured as the air opening / closing means 13 by setting the maximum throttle of the flow rate adjusting valve to 0. In the present embodiment, both the air opening / closing means 13 and the air amount adjusting means 14 are shown in FIG.

また、薬剤噴霧装置１０４は、空気配管２に、当該空気配管２における空気Ａｂ，Ａｃの流量を検出する空気流量計１５が設けられている。   Further, in the medicine spraying device 104, an air flow meter 15 for detecting the flow rate of the air Ab, Ac in the air pipe 2 is provided in the air pipe 2.

また、薬剤噴霧装置１０４は、予備二流体ノズル３’が設けられている。予備二流体ノズル３’は、上述した二流体ノズル３と同様のもので、液配管１と空気配管２とに接続されている。そして、薬剤噴霧装置１０４は、二流体ノズル３の液配管１への接続と予備二流体ノズル３’の液配管１への接続とを選択的に切り換えるノズル液切換手段（切換弁）１６が設けられている。さらに、薬剤噴霧装置１０４は、二流体ノズル３の空気配管２への接続と予備二流体ノズル３’の空気配管２への接続とを選択的に切り換えるノズル空気切換手段（切換弁）１７が設けられている。   Further, the medicine spraying device 104 is provided with a spare two-fluid nozzle 3 '. The spare two-fluid nozzle 3 ′ is the same as the two-fluid nozzle 3 described above, and is connected to the liquid pipe 1 and the air pipe 2. The medicine spraying device 104 is provided with nozzle liquid switching means (switching valve) 16 that selectively switches between the connection of the two-fluid nozzle 3 to the liquid pipe 1 and the connection of the auxiliary two-fluid nozzle 3 ′ to the liquid pipe 1. It has been. Further, the medicine spraying device 104 is provided with nozzle air switching means (switching valve) 17 for selectively switching between connection of the two-fluid nozzle 3 to the air pipe 2 and connection of the spare two-fluid nozzle 3 ′ to the air pipe 2. It has been.

また、二流体ノズル３および予備二流体ノズル３’が設置された煙道１０２には、その内部空間Ｓに流通する排ガスＧの流量（ボイラ１０１の負荷変動）を検出する排ガス流量計１８が設けられている。   The flue 102 in which the two-fluid nozzle 3 and the spare two-fluid nozzle 3 ′ are installed is provided with an exhaust gas flow meter 18 for detecting the flow rate of the exhaust gas G flowing through the internal space S (load fluctuation of the boiler 101). It has been.

また、薬剤噴霧装置１０４は、制御手段１９が設けられている。制御手段１９は、マイコンなどで構成され、薬剤噴霧装置１０４を統括的に制御するものである。制御手段１９は、薬剤液供給手段（薬剤液ポンプ５ｃ，圧力計５ｄ）５と、液切換手段７と、液開閉手段８と、液量調整手段９と、空気切換手段１２と、空気開閉手段１３と、空気量調整手段１４と、空気流量計１５と、ノズル液切換手段１６と、ノズル空気切換手段１７と、排ガス流量計１８とに接続されている。また、制御手段１９は、図示しないＲＯＭやＲＡＭなどの記憶部に、圧力計５ｄで検出される薬剤液Ｄの供給圧力の所定の閾値情報が予め格納されている。また、制御手段１９は、図示しない記憶部に、排ガス流量計１８で検出される排ガスＧの流量（ボイラ１０１の負荷変動）の所定の閾値情報が予め格納されている。   Further, the medicine spraying device 104 is provided with a control means 19. The control means 19 is composed of a microcomputer or the like, and controls the medicine spraying device 104 in an integrated manner. The control means 19 includes chemical liquid supply means (chemical liquid pump 5c, pressure gauge 5d) 5, liquid switching means 7, liquid opening / closing means 8, liquid amount adjusting means 9, air switching means 12, air switching means. 13, an air amount adjusting unit 14, an air flow meter 15, a nozzle liquid switching unit 16, a nozzle air switching unit 17, and an exhaust gas flow meter 18. The control means 19 stores in advance a predetermined threshold value information of the supply pressure of the drug solution D detected by the pressure gauge 5d in a storage unit such as a ROM or a RAM (not shown). Further, the control means 19 stores in advance a predetermined threshold value information of the flow rate of the exhaust gas G (load fluctuation of the boiler 101) detected by the exhaust gas flow meter 18 in a storage unit (not shown).

なお、制御手段１９は、ボイラ１０１の負荷変動を把握するにあたり、排ガス流量計１８からの排ガス流量の入力に代えて、図２に示すように、排ガス処理システム１００が発電プラント５０に適用されている場合での発電プラント５０の発電量や、図１に示す排ガス処理システム１００におけるボイラ１０１に燃焼用空気Ａａを送る送風機１０９の風量（送風機１０９のダクト開度や差圧）や、図１に示す排ガス処理システム１００の熱交換器１０６後流で電気集塵機１０７に排ガスＧを送る送風機１１０の風量（送風機１１０のダクト開度や差圧）などを入力してもよい。この場合、制御手段１９は、図示しない記憶部に、発電プラント５０の発電量の所定の閾値情報や、排ガス処理システム１００の送風機１０９，１１０の風量の閾値情報が予め格納されている。   In order to grasp the load fluctuation of the boiler 101, the control means 19 replaces the input of the exhaust gas flow rate from the exhaust gas flow meter 18, and the exhaust gas treatment system 100 is applied to the power plant 50 as shown in FIG. FIG. 1 shows the amount of power generated by the power plant 50, the air volume of the blower 109 that sends the combustion air Aa to the boiler 101 in the exhaust gas treatment system 100 shown in FIG. The air volume of the blower 110 that sends the exhaust gas G to the electrostatic precipitator 107 in the downstream of the heat exchanger 106 of the exhaust gas treatment system 100 shown (duct opening degree or differential pressure of the blower 110) or the like may be input. In this case, the control means 19 stores in advance a threshold value information of the power generation amount of the power plant 50 and the air volume threshold information of the blowers 109 and 110 of the exhaust gas treatment system 100 in a storage unit (not shown).

以下に、制御手段１９による薬剤噴霧装置１０４の制御について図を参照して説明する。図６〜図１１、図１３および図１４は、制御手段１９の動作を示すフローチャートである。   Below, control of the medicine spraying device 104 by the control means 19 will be described with reference to the drawings. 6 to 11, 13 and 14 are flowcharts showing the operation of the control means 19.

薬剤噴霧装置１０４の起動時（排ガス処理システム１００におけるボイラ１０１の起動時を含む）には、図６に示すように、制御手段１９は、空気供給手段１０を駆動すると共に空気開閉手段１３を閉状態から開状態とする（ステップＳＴ１）。その後、制御手段１９は、液切換手段７を薬剤液供給手段５側に切り換え、かつ薬剤液供給手段５を駆動すると共に液開閉手段８を閉状態から開状態とする（ステップＳＴ２）。すなわち、薬剤噴霧装置１０４は、煙道１０２への薬剤液Ｄの供給を開始する場合、二流体ノズル３から空気Ａｂを先に噴射させ、その後に薬剤液Ｄを噴射させる。   When the chemical spraying device 104 is activated (including when the boiler 101 is activated in the exhaust gas treatment system 100), the control means 19 drives the air supply means 10 and closes the air opening / closing means 13 as shown in FIG. From the state to the open state (step ST1). Thereafter, the control means 19 switches the liquid switching means 7 to the chemical liquid supply means 5 side, drives the chemical liquid supply means 5 and changes the liquid opening / closing means 8 from the closed state to the open state (step ST2). In other words, when the medicine spraying device 104 starts to supply the medicine liquid D to the flue 102, the medicine Ab is ejected first from the two-fluid nozzle 3, and then the medicine liquid D is ejected.

薬剤噴霧装置１０４の停止時（排ガス処理システム１００におけるボイラ１０１の停止時を含む）には、図７に示すように、制御手段１９は、液切換手段７を薬剤液供給手段５側から水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止する（ステップＳＴ１１）。その後、制御手段１９は、液開閉手段８を開状態から閉状態とする（ステップＳＴ１２）。その後、制御手段１９は、空気開閉手段１３を開状態から閉状態とすると共に空気供給手段１０の駆動を停止する（ステップＳＴ１３）。すなわち、薬剤噴霧装置１０４は、煙道１０２への薬剤液Ｄの供給を停止する場合、二流体ノズル３からの薬剤液Ｄの噴射を止めて水Ｗを噴射させ、その後、二流体ノズル３からの水Ｗの噴射を先に止めた後に空気Ａｂの噴射を止める。   When the chemical spraying device 104 is stopped (including when the boiler 101 is stopped in the exhaust gas treatment system 100), as shown in FIG. 7, the control means 19 supplies the liquid switching means 7 with water from the chemical liquid supply means 5 side. Switching to the means 6 side and driving of the drug solution supply means 5 are stopped (step ST11). Thereafter, the control means 19 changes the liquid opening / closing means 8 from the open state to the closed state (step ST12). Thereafter, the control means 19 changes the air opening / closing means 13 from the open state to the closed state and stops driving the air supply means 10 (step ST13). That is, when stopping the supply of the drug solution D to the flue 102, the drug spraying device 104 stops the injection of the drug solution D from the two-fluid nozzle 3 and jets the water W, and then from the two-fluid nozzle 3 After stopping the injection of water W, the injection of air Ab is stopped.

薬剤噴霧装置１０４の起動中（排ガス処理システム１００におけるボイラ１０１の起動中を含む）において、図８に示すように、制御手段１９は、液切換手段７を薬剤液供給手段５側に切り換えると共に薬剤液供給手段５を駆動している状態で、圧力計５ｄで検出された薬剤液Ｄの供給圧力を入力し、入力した圧力が所定の閾値を超えた場合（ステップＳＴ２１：Ｙｅｓ）、液切換手段７を薬剤液供給手段５側から水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止する（ステップＳＴ２２）。すなわち、薬剤噴霧装置１０４は、高温（３００℃〜３５０℃）の排ガスＧにより薬剤液Ｄが蒸発して固形成分が析出し薬剤液Ｄの供給量が低下したことを検出した場合、液配管１および二流体ノズル３に水Ｗを供給する。   During the activation of the chemical spraying device 104 (including the activation of the boiler 101 in the exhaust gas treatment system 100), the control means 19 switches the liquid switching means 7 to the chemical liquid supply means 5 side as shown in FIG. When the supply pressure of the drug solution D detected by the pressure gauge 5d is input while the liquid supply means 5 is being driven, and the input pressure exceeds a predetermined threshold (step ST21: Yes), the liquid switching means 7 is switched from the drug solution supply means 5 side to the water supply means 6 side and the drive of the drug solution supply means 5 is stopped (step ST22). That is, when the chemical spraying device 104 detects that the chemical liquid D is evaporated by the high-temperature (300 ° C. to 350 ° C.) exhaust gas G, the solid component is precipitated, and the supply amount of the chemical liquid D is reduced, the liquid pipe 1 Water W is supplied to the two-fluid nozzle 3.

なお、ステップＳＴ２２の後、制御手段１９は、所定時間（例えば、１０分程度）経過した場合（ステップＳＴ２３：Ｙｅｓ）、薬剤液供給手段５を駆動すると共に液切換手段７を水供給手段６側から薬剤液供給手段５側に切り換える（ステップＳＴ２４）。その後、制御手段１９は、圧力計５ｄで検出された薬剤液Ｄの供給圧力を再び入力し、入力した圧力が所定の閾値を超えていなければ（ステップＳＴ２５：Ｎｏ）、図８における薬剤噴霧装置１０４の起動中の制御を終了する。一方、制御手段１９は、ステップＳＴ２５において、入力した圧力が所定の閾値を超えた場合（ステップＳＴ２５：Ｙｅｓ）、薬剤噴霧装置１０４に何らかの故障が発生したとして後述の故障時の制御に移行する（ステップＳＴ２６）。   After step ST22, when a predetermined time (for example, about 10 minutes) has elapsed (step ST23: Yes), the control means 19 drives the chemical liquid supply means 5 and moves the liquid switching means 7 to the water supply means 6 side. Is switched to the drug solution supply means 5 side (step ST24). Thereafter, the control means 19 inputs again the supply pressure of the drug solution D detected by the pressure gauge 5d, and if the input pressure does not exceed a predetermined threshold (step ST25: No), the drug spraying apparatus in FIG. The control during activation of 104 is terminated. On the other hand, when the input pressure exceeds a predetermined threshold value in step ST25 (step ST25: Yes), the control means 19 shifts to the control at the time of failure described later, assuming that some failure has occurred in the medicine spraying device 104 ( Step ST26).

故障時の制御では、図９に示すように、制御手段１９は、液切換手段７を薬剤液供給手段５側から水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止する（ステップＳＴ２６１）。その後、制御手段１９は、ノズル空気切換手段１７を予備二流体ノズル３’側に切り換えた後（ステップＳＴ２６２）、ノズル液切換手段１６を予備二流体ノズル３’側に切り換える（ステップＳＴ２６３）。その後、液切換手段７を薬剤液供給手段５側に切り換えると共に薬剤液供給手段５を駆動する（ステップＳＴ２６４）。すなわち、薬剤噴霧装置１０４は、二流体ノズル３を予備二流体ノズル３’に切り換える場合、二流体ノズル３からの薬剤液Ｄの噴射を止めて水Ｗを噴射させ、その後、予備二流体ノズル３’には、空気Ａｂを先に切り換えてから、水Ｗに切り換えつつ薬剤液Ｄに切り換える。そして、二流体ノズル３を煙道１０２から取り外して点検する。   In the control at the time of failure, as shown in FIG. 9, the control means 19 switches the liquid switching means 7 from the chemical liquid supply means 5 side to the water supply means 6 side and stops driving the chemical liquid supply means 5 (step) ST261). Thereafter, the control means 19 switches the nozzle air switching means 17 to the spare two-fluid nozzle 3 'side (step ST262), and then switches the nozzle liquid switching means 16 to the spare two-fluid nozzle 3' side (step ST263). Thereafter, the liquid switching means 7 is switched to the chemical liquid supply means 5 side and the chemical liquid supply means 5 is driven (step ST264). That is, when switching the two-fluid nozzle 3 to the spare two-fluid nozzle 3 ′, the medicine spraying device 104 stops the injection of the drug liquid D from the two-fluid nozzle 3 and jets water W, and then the spare two-fluid nozzle 3 First, after switching the air Ab first, the air Ab is switched to the water W while switching to the water W. Then, the two-fluid nozzle 3 is removed from the flue 102 and inspected.

また、薬剤噴霧装置１０４の起動中（排ガス処理システム１００におけるボイラ１０１の起動中を含む）において、制御手段１９は、排ガスＧの流量の増加に伴い薬剤液Ｄの供給量を増す。図１０に示すように、制御手段１９は、排ガスＧの流量増加を検出または予測した場合（ステップＳＴ３１：Ｙｅｓ）、空気量調整手段１４により空気Ａｂ（Ａｃ）の流通量を増加させる（ステップＳＴ３２）。その後、制御手段１９は、液量調整手段９により薬剤液Ｄの流通量を増加させる（ステップＳＴ３３）。すなわち、薬剤噴霧装置１０４は、薬剤液Ｄの噴霧量を増加させる場合、空気Ａｂの流通量を増加させてから、薬剤液Ｄの流通量を増加させる。   Further, during the activation of the chemical spraying device 104 (including the activation of the boiler 101 in the exhaust gas treatment system 100), the control means 19 increases the supply amount of the chemical liquid D as the flow rate of the exhaust gas G increases. As shown in FIG. 10, when the control means 19 detects or predicts an increase in the flow rate of the exhaust gas G (step ST31: Yes), the air amount adjusting means 14 increases the circulation amount of the air Ab (Ac) (step ST32). ). Thereafter, the control means 19 increases the circulation amount of the drug solution D by the liquid amount adjusting means 9 (step ST33). That is, when increasing the spray amount of the drug solution D, the drug spray device 104 increases the flow rate of the drug solution D after increasing the flow rate of the air Ab.

また、薬剤噴霧装置１０４の起動中（排ガス処理システム１００におけるボイラ１０１の起動中を含む）において、制御手段１９は、排ガスＧの流量の減少に伴い薬剤液Ｄの供給量を減らす。図１１に示すように、制御手段１９は、排ガスＧの流量減少を検出または予測した場合（ステップＳＴ４１：Ｙｅｓ）、液量調整手段９により薬剤液Ｄの流通量を減少させる（ステップＳＴ４２）。その後、制御手段１９は、空気量調整手段１４により空気Ａｂ（Ａｃ）の流通量を減少させる（ステップＳＴ４３）。すなわち、薬剤噴霧装置１０４は、薬剤液Ｄの噴霧量を減少させる場合、薬剤液Ｄの流通量を減少させてから、空気Ａｂの流通量を減少させる。   In addition, during the activation of the chemical spraying device 104 (including the activation of the boiler 101 in the exhaust gas treatment system 100), the control means 19 reduces the supply amount of the chemical liquid D as the flow rate of the exhaust gas G decreases. As shown in FIG. 11, when the flow rate of the exhaust gas G is detected or predicted (step ST41: Yes), the control unit 19 decreases the flow rate of the drug solution D by the liquid amount adjusting unit 9 (step ST42). Thereafter, the control means 19 causes the air amount adjusting means 14 to reduce the circulation amount of the air Ab (Ac) (step ST43). That is, when reducing the spray amount of the drug solution D, the drug spray device 104 decreases the flow rate of the air Ab after decreasing the flow rate of the drug solution D.

ここで、排ガスＧの流量は、上述したように排ガス流量計１８による検出により直接的に把握することができる。この場合、制御手段１９は、排ガス流量計１８から入力した排ガスＧの流量が所定の閾値を超えた場合にボイラ１０１の負荷上昇と把握でき、一方、排ガスＧの流量が所定の閾値を下回った場合にボイラ１０１の負荷低下と把握できる。その他、排ガスＧの流量は、発電プラント５０の発電量や、排ガス処理システム１００の送風機１０９または送風機１１０の風量（送風機１０９，１１０のダクト開度や差圧）により間接的に把握できる。この場合、制御手段１９は、発電プラント５０から入力した発電量が所定の閾値を超えた場合に、ボイラ１０１の稼働率が上昇しているのでボイラ１０１の負荷上昇により排ガスＧの流量が増加したと把握でき、一方、発電量が所定の閾値を下回った場合に、ボイラ１０１の稼働率が低下しているのでボイラ１０１の負荷低下により排ガスＧの流量が減少したと把握できる。また、制御手段１９は、排ガス処理システム１００の送風機１０９，１１０から入力した風量が所定の閾値を超えた場合に、ボイラ１０１の稼働率が上昇しているのでボイラ１０１の負荷上昇により排ガスＧの流量が増加したと把握でき、一方、送風機１０９，１１０から入力した風量が所定の閾値を下回った場合に、ボイラ１０１の稼働率が低下しているのでボイラ１０１の負荷低下により排ガスＧの流量が減少したと把握できる。   Here, the flow rate of the exhaust gas G can be directly grasped by detection by the exhaust gas flow meter 18 as described above. In this case, the control means 19 can grasp that the load of the boiler 101 is increased when the flow rate of the exhaust gas G input from the exhaust gas flow meter 18 exceeds a predetermined threshold value, while the flow rate of the exhaust gas G falls below the predetermined threshold value. In this case, it can be understood that the load on the boiler 101 is reduced. In addition, the flow rate of the exhaust gas G can be indirectly grasped by the power generation amount of the power plant 50 and the air volume of the blower 109 or the blower 110 of the exhaust gas treatment system 100 (the duct opening and differential pressure of the blowers 109 and 110). In this case, the control means 19 increases the flow rate of the exhaust gas G due to an increase in the load on the boiler 101 because the operating rate of the boiler 101 increases when the amount of power input from the power plant 50 exceeds a predetermined threshold. On the other hand, when the power generation amount falls below a predetermined threshold, it is possible to grasp that the flow rate of the exhaust gas G has decreased due to a decrease in the load on the boiler 101 because the operating rate of the boiler 101 has decreased. Further, when the air volume input from the blowers 109 and 110 of the exhaust gas treatment system 100 exceeds a predetermined threshold, the control means 19 increases the operating rate of the boiler 101. It can be understood that the flow rate has increased. On the other hand, when the air volume input from the blowers 109 and 110 falls below a predetermined threshold value, the operating rate of the boiler 101 is reduced. We can grasp that it decreased.

なお、制御手段１９は、日中または夜間などの時間や、季節などにより発電プラント５０の発電量が変動することから、これに基づいて排ガスＧの流量変動を予測できる。そして、図１２のグラフに、排ガスＧの流量変動の検出（排ガス流量計１８）による薬剤液噴霧量制御と、排ガスＧの流量変動の予測による薬剤液噴霧量制御との関係を示す。すなわち、図１２に示すように、流量検出の場合は、ボイラ１０１の負荷変動に追従して薬剤液噴霧量を増減でき、一方、流量予測の場合は、ボイラ１０１の負荷変動を先回りして薬剤液噴霧量を増減できる。これらは、必要に応じていずれかを適宜選択すればよい。   The control means 19 can predict the fluctuation in the flow rate of the exhaust gas G based on the fluctuation of the power generation amount of the power plant 50 depending on the time such as daytime or nighttime or the season. The graph of FIG. 12 shows the relationship between the chemical liquid spray amount control by detecting the flow rate fluctuation of the exhaust gas G (exhaust gas flow meter 18) and the chemical liquid spray amount control by predicting the flow rate fluctuation of the exhaust gas G. That is, as shown in FIG. 12, in the case of detecting the flow rate, the amount of sprayed chemical liquid can be increased or decreased following the load fluctuation of the boiler 101. On the other hand, in the case of predicting the flow rate, The amount of liquid spray can be increased or decreased. Any of these may be appropriately selected as necessary.

また、薬剤噴霧装置１０４の起動中（排ガス処理システム１００におけるボイラ１０１の起動中を含む）において、図１３に示すように、制御手段１９は、空気切換手段１２を空気供給手段１０側に切り換えている状態で、空気流量計１５で検出された流量を入力し、入力した流量が所定の閾値を下回った場合（ステップＳＴ５１：Ｙｅｓ）、空気切換手段１２を予備空気供給手段１１側に切り換える（ステップＳＴ５２）。すなわち、薬剤噴霧装置１０４は、空気供給手段１０による空気Ａｂの送り量が減少した場合、予備空気供給手段１１に切り換える。   Further, during the activation of the chemical spraying device 104 (including the activation of the boiler 101 in the exhaust gas treatment system 100), as shown in FIG. 13, the control means 19 switches the air switching means 12 to the air supply means 10 side. When the flow rate detected by the air flow meter 15 is input and the input flow rate falls below a predetermined threshold (step ST51: Yes), the air switching unit 12 is switched to the spare air supply unit 11 side (step ST51). ST52). That is, the medicine spraying device 104 switches to the preliminary air supply unit 11 when the amount of air Ab fed by the air supply unit 10 decreases.

また、薬剤噴霧装置１０４の起動中（排ガス処理システム１００におけるボイラ１０１の起動中を含む）において、図１４に示すように、制御手段１９は、空気流量計１５で検出された流量を入力し、入力した流量が所定の閾値を下回った場合（ステップＳＴ６１：Ｙｅｓ）、液切換手段７を薬剤液供給手段５側から水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止する（ステップＳＴ６２）。その後、制御手段１９は、液開閉手段８を開状態から閉状態とする（ステップＳＴ６３）。その後、制御手段１９は、空気開閉手段１３を開状態から閉状態とすると共に空気供給手段１０の駆動を停止する（ステップＳＴ６４）。すなわち、薬剤噴霧装置１０４は、予備空気供給手段１１を有さなければ、空気供給手段１０による空気Ａｂの送り量が減少した場合、煙道１０２への薬剤液Ｄの供給を停止し、水Ｗを供給させた後に空気Ａｂを停止する。   Further, during the activation of the chemical spraying device 104 (including the activation of the boiler 101 in the exhaust gas treatment system 100), as shown in FIG. 14, the control means 19 inputs the flow rate detected by the air flow meter 15, When the input flow rate falls below the predetermined threshold (step ST61: Yes), the liquid switching means 7 is switched from the chemical liquid supply means 5 side to the water supply means 6 side and the driving of the chemical liquid supply means 5 is stopped (step) ST62). Thereafter, the control means 19 changes the liquid opening / closing means 8 from the open state to the closed state (step ST63). Thereafter, the control means 19 changes the air opening / closing means 13 from the open state to the closed state and stops driving the air supply means 10 (step ST64). In other words, if the medicine spraying device 104 does not have the preliminary air supply means 11, when the amount of air Ab fed by the air supply means 10 decreases, the supply of the medicine liquid D to the flue 102 is stopped and the water W After the air is supplied, the air Ab is stopped.

上述したように、本実施の形態の薬剤噴霧装置１０４は、薬剤液Ｄを送る液配管１と空気Ａｂを送る空気配管２とに接続されると共に、煙道１０２内に配置され、液配管１から供給された薬剤液Ｄを空気配管２から供給された空気Ａｂの気流によって微粒化することで微細霧を形成し煙道１０２に噴霧する二流体ノズル３を有した薬剤噴霧装置１０４において、液配管１に接続されて当該液配管１に薬剤液Ｄを供給する薬剤液供給手段５と、液配管１に接続されて当該液配管１に水Ｗを供給する水供給手段６と、薬剤液供給手段５から液配管１への薬剤液Ｄの流通と水供給手段６から液配管１への水Ｗの流通とを選択的に切り換える液切換手段７と、薬剤液供給手段５における薬剤液Ｄの供給圧力を検出する圧力計５ｄと、液切換手段７を薬剤液供給手段５側に切り換えると共に薬剤液供給手段５を駆動した状態で、圧力計５ｄで検出された圧力を入力し、入力した圧力が所定の閾値を超えた場合、液切換手段７を水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止する制御手段１９とを備える。   As described above, the drug spraying device 104 according to the present embodiment is connected to the liquid pipe 1 that sends the drug liquid D and the air pipe 2 that sends the air Ab, and is disposed in the flue 102, and the liquid pipe 1. In the medicine spraying device 104 having the two-fluid nozzle 3 for atomizing the medicine liquid D supplied from the air pipe 2 by atomizing it with the air flow of the air Ab supplied from the air pipe 2 and spraying it on the flue 102, A chemical liquid supply means 5 connected to the pipe 1 for supplying the chemical liquid D to the liquid pipe 1, a water supply means 6 connected to the liquid pipe 1 for supplying water W to the liquid pipe 1, and a chemical liquid supply A liquid switching means 7 for selectively switching the flow of the chemical liquid D from the means 5 to the liquid pipe 1 and the flow of the water W from the water supply means 6 to the liquid pipe 1; Pressure gauge 5d for detecting supply pressure and liquid switching means 7 are While switching to the liquid supply means 5 side and driving the chemical liquid supply means 5, the pressure detected by the pressure gauge 5d is input, and when the input pressure exceeds a predetermined threshold, the liquid switch means 7 is supplied with water. And a control means 19 for switching to the means 6 side and stopping the driving of the drug solution supply means 5.

この薬剤噴霧装置１０４によれば、高温（３００℃〜３５０℃）の排ガスＧにより薬剤液Ｄが蒸発して固形成分が析出し始めても、薬剤液Ｄの供給量が低下したことを検出することで、二流体ノズル３の詰まりとして、液配管１および二流体ノズル３に水を供給する。この結果、噴霧する薬剤液Ｄの固形成分の析出による二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying device 104, even if the medicine liquid D evaporates due to the high-temperature (300 ° C. to 350 ° C.) exhaust gas G and solid components start to precipitate, it is detected that the supply amount of the medicine liquid D has decreased. Thus, water is supplied to the liquid pipe 1 and the two-fluid nozzle 3 as the two-fluid nozzle 3 is clogged. As a result, it is possible to prevent clogging of the two-fluid nozzle 3 due to precipitation of the solid component of the drug liquid D to be sprayed.

また、本実施の形態の薬剤噴霧装置１０４では、空気配管２に接続されて当該空気配管２に空気Ａｂを供給する空気供給手段１０と、空気配管２での空気Ａｂの流通を開閉する空気開閉手段１３と、液配管１での薬剤液Ｄまたは水Ｗの流通を開閉する液開閉手段８とを備え、制御手段１９は、薬剤液Ｄの供給を開始する場合、空気供給手段１０を駆動すると共に空気開閉手段１３を開状態とし、その後、液切換手段７を薬剤液供給手段５側に切り換え、かつ薬剤液供給手段５を駆動すると共に液開閉手段８を開状態とする。   Further, in the medicine spraying apparatus 104 of the present embodiment, the air supply means 10 that is connected to the air pipe 2 and supplies the air Ab to the air pipe 2 and the air opening and closing that opens and closes the circulation of the air Ab in the air pipe 2. Means 13 and liquid opening / closing means 8 for opening and closing the flow of the drug solution D or water W in the liquid pipe 1 are provided. When the supply of the drug solution D is started, the control means 19 drives the air supply means 10. At the same time, the air opening / closing means 13 is opened, and then the liquid switching means 7 is switched to the chemical liquid supply means 5 side, and the chemical liquid supply means 5 is driven and the liquid opening / closing means 8 is opened.

この薬剤噴霧装置１０４によれば、薬剤液Ｄの供給を開始するとき、二流体ノズル３から空気Ａｂを先に噴射させ、その後に薬剤液Ｄを噴射させる。この結果、先に噴射された空気Ａｂにより二流体ノズル３内部が冷却されることから、噴霧する薬剤液Ｄの蒸発による固形成分の析出を防止でき、二流体ノズル３内部の詰まりを防止することが可能になる。また、先に噴射された空気Ａｂにより、後に噴射される薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying device 104, when supply of the medicine liquid D is started, the air Ab is jetted first from the two-fluid nozzle 3, and then the medicine liquid D is jetted. As a result, since the inside of the two-fluid nozzle 3 is cooled by the air Ab previously jetted, precipitation of solid components due to evaporation of the sprayed drug liquid D can be prevented, and clogging inside the two-fluid nozzle 3 can be prevented. Is possible. Further, since the drug liquid D to be jetted later is atomized by the air Ab jetted first, the drug liquid D does not remain in the jet port of the two-fluid nozzle 3, and therefore, the jet liquid to the jet port of the two-fluid nozzle 3. It is possible to prevent the dust in the exhaust gas G from adhering and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧装置１０４では、制御手段１９は、薬剤液Ｄの供給を停止する場合、液切換手段７を水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止し、その後、液開閉手段８を閉状態とし、その後、空気開閉手段１３を閉状態とすると共に空気供給手段１０の駆動を停止する。   In the medicine spraying device 104 of the present embodiment, when the supply of the medicine liquid D is stopped, the control means 19 switches the liquid switching means 7 to the water supply means 6 side and stops the driving of the medicine liquid supply means 5. Then, the liquid opening / closing means 8 is closed, and then the air opening / closing means 13 is closed and the driving of the air supply means 10 is stopped.

この薬剤噴霧装置１０４によれば、薬剤液Ｄの供給を停止するとき、二流体ノズル３からの薬剤液Ｄの噴射を止めて水Ｗを噴射させ、その後、二流体ノズル３からの水Ｗの噴射を先に止めた後に空気Ａｂの噴射を止める。この結果、二流体ノズル３を水Ｗで洗浄し、かつ洗浄後には空気Ａｂで水分を飛ばして、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to the medicine spraying device 104, when the supply of the medicine liquid D is stopped, the medicine liquid D from the two-fluid nozzle 3 is stopped and the water W is ejected, and then the water W from the two-fluid nozzle 3 is injected. After stopping the injection first, the injection of the air Ab is stopped. As a result, the two-fluid nozzle 3 is washed with water W, and after washing, moisture is blown off with the air Ab, so that the chemical liquid D does not remain in the jet port of the two-fluid nozzle 3. It is possible to prevent the dust in the exhaust gas G from adhering and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧装置１０４では、空気配管２での空気Ａｂの流通量を調整する空気量調整手段１４と、液配管１での薬剤液Ｄの流通量を調整する液量調整手段９とを備え、制御手段１９は、煙道１０２に流通する排ガスＧの流量増加に伴い、空気量調整手段１４により空気Ａｂの流通量を増加させた後、液量調整手段９により薬剤液Ｄの流通量を増加させる。   Further, in the drug spraying apparatus 104 of the present embodiment, the air amount adjusting means 14 for adjusting the flow rate of the air Ab in the air pipe 2 and the liquid volume adjustment for adjusting the flow rate of the drug solution D in the liquid pipe 1. And the control means 19 increases the flow rate of the air Ab by the air amount adjusting means 14 as the flow rate of the exhaust gas G flowing through the flue 102 increases, and then the chemical liquid by the liquid amount adjusting means 9 Increase the distribution volume of D.

この薬剤噴霧装置１０４によれば、排ガスＧの流量増加に伴い、薬剤液Ｄの噴霧量を増加させることが可能になる。しかも、この薬剤噴霧装置１０４によれば、薬剤液Ｄの噴霧量を増加させる場合、空気Ａｂの流通量を増加させてから、薬剤液Ｄの流通量を増加させる。このため、先に流通量が増加された空気Ａｂにより、後に流通量が増加された薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying device 104, it becomes possible to increase the spray amount of the medicine liquid D as the flow rate of the exhaust gas G increases. Moreover, according to the drug spraying device 104, when the spray amount of the drug solution D is increased, the flow rate of the drug solution D is increased after increasing the flow rate of the air Ab. For this reason, since the drug liquid D whose flow rate has been increased later is atomized by the air Ab whose flow rate has been increased previously, the drug solution D does not remain in the injection port of the two-fluid nozzle 3. It is possible to prevent the dust in the exhaust gas G from adhering to the injection port of the fluid nozzle 3 and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧装置１０４では、制御手段１９は、排ガスＧの流量減少に伴い、液量調整手段９により薬剤液Ｄの流通量を減少させた後、空気量調整手段１４により空気Ａｂの流通量を減少させる。   Further, in the medicine spraying device 104 of the present embodiment, the control means 19 reduces the flow rate of the medicine liquid D by the liquid amount adjusting means 9 as the flow rate of the exhaust gas G decreases, and then the air amount adjusting means 14 Reduce the flow rate of air Ab.

この薬剤噴霧装置１０４によれば、排ガスＧの流量減少に伴い、薬剤液Ｄの噴霧量を減少させることが可能になる。しかも、この薬剤噴霧装置１０４によれば、薬剤液Ｄの噴霧量を減少させる場合、薬剤液Ｄの流通量を減少させてから、空気Ａｂの流通量を減少させる。このため、先に流通量が減少された薬剤液Ｄが、流通量が減少される前の空気Ａｂにより微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to the medicine spraying device 104, the spray amount of the medicine liquid D can be reduced as the flow rate of the exhaust gas G decreases. In addition, according to the drug spraying device 104, when the spray amount of the drug solution D is decreased, the flow rate of the drug solution D is decreased, and then the flow rate of the air Ab is decreased. For this reason, since the drug solution D whose flow rate has been reduced first is atomized by the air Ab before the flow rate is reduced, the drug solution D does not remain in the injection port of the two-fluid nozzle 3. It is possible to prevent the dust in the exhaust gas G from adhering to the injection port of the two-fluid nozzle 3 and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧装置１０４では、空気配管２に接続されて当該空気配管２に空気Ａｂを供給する空気供給手段１０と、空気配管２に接続されて当該空気配管２に空気Ａｃを供給する予備空気供給手段１１と、空気供給手段１０から空気配管２への空気Ａｂの流通と予備空気供給手段１１から空気配管２への空気Ａｃの流通とを選択的に切り換える空気切換手段１２と、空気配管２における空気Ａｂ，Ａｃの流量を検出する空気流量計１５とを備え、制御手段１９は、空気切換手段１２を空気供給手段１０側に切り換えている状態で、空気流量計１５で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、空気切換手段１２を予備空気供給手段１１側に切り換える。   Further, in the medicine spraying device 104 of the present embodiment, the air supply means 10 that is connected to the air pipe 2 and supplies the air Ab to the air pipe 2, and the air Ac 2 connected to the air pipe 2 to the air pipe 2. And air switching means 12 for selectively switching between the flow of air Ab from the air supply means 10 to the air pipe 2 and the flow of air Ac from the spare air supply means 11 to the air pipe 2. And an air flow meter 15 for detecting the flow rate of the air Ab, Ac in the air pipe 2, and the control means 19 is the air flow meter 15 in a state where the air switching means 12 is switched to the air supply means 10 side. When the detected flow rate is input and the input flow rate falls below a predetermined threshold value, the air switching means 12 is switched to the spare air supply means 11 side.

この薬剤噴霧装置１０４によれば、空気供給手段１０による空気Ａｂの送り量が減少した場合、予備空気供給手段１１に切り換えるため、予備空気供給手段１１の空気Ａｃにより、排ガス熱による二流体ノズル３内部の薬剤液Ｄの蒸発を防止することから、析出した固形成分による二流体ノズル３内部の詰まりを防止することが可能になる。また、予備空気供給手段１１の空気Ａｃにより薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying device 104, when the amount of air Ab fed by the air supply means 10 decreases, the two-fluid nozzle 3 due to exhaust gas heat is used by the air Ac of the spare air supply means 11 to switch to the spare air supply means 11. Since evaporation of the internal drug solution D is prevented, clogging inside the two-fluid nozzle 3 due to the precipitated solid component can be prevented. Further, since the drug solution D is atomized by the air Ac of the preliminary air supply means 11, the drug solution D does not remain in the injection port of the two-fluid nozzle 3. It becomes possible to prevent clogging of the two-fluid nozzle 3 by preventing the adhesion of soot.

また、本実施の形態の薬剤噴霧装置１０４では、空気配管２に接続されて当該空気配管２に空気を供給する空気供給手段１０と、空気配管２での空気Ａｂの流通を開閉する空気開閉手段１３と、液配管１での薬剤液Ｄまたは水Ｗの流通を開閉する液開閉手段８と、空気配管２における空気Ａｂの流量を検出する空気流量計１５とを備え、制御手段１９は、液開閉手段８および空気開閉手段１３を開状態とし、空気流量計１５で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、液切換手段７を薬剤液供給手段５側から水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止し、その後、液開閉手段８を閉状態とした後、空気開閉手段１３を閉状態とすると共に空気供給手段１０の駆動を停止する。   Further, in the medicine spraying apparatus 104 of the present embodiment, an air supply means 10 that is connected to the air pipe 2 and supplies air to the air pipe 2, and an air opening and closing means that opens and closes the circulation of the air Ab in the air pipe 2. 13, a liquid opening / closing means 8 that opens and closes the flow of the drug solution D or water W in the liquid pipe 1, and an air flow meter 15 that detects the flow rate of the air Ab in the air pipe 2. When the opening / closing means 8 and the air opening / closing means 13 are opened, the flow rate detected by the air flow meter 15 is input, and when the input flow rate falls below a predetermined threshold value, the liquid switching means 7 is moved from the drug solution supply means 5 side. After switching to the water supply means 6 side, the driving of the chemical liquid supply means 5 is stopped, and then the liquid opening / closing means 8 is closed, then the air opening / closing means 13 is closed and the driving of the air supply means 10 is stopped. To do.

この薬剤噴霧装置１０４によれば、空気供給手段１０による空気Ａｂの送り量が減少した場合、煙道１０２への薬剤液Ｄの供給を停止し、水Ｗを供給させた後に空気Ａｂを停止する。この結果、二流体ノズル３を水Ｗで洗浄し、かつ洗浄後には空気Ａｂで水分を飛ばすので、二流体ノズル３の噴射口に薬剤液Ｄを残留させず、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying device 104, when the feed amount of the air Ab by the air supply means 10 decreases, the supply of the medicine liquid D to the flue 102 is stopped, and after the water W is supplied, the air Ab is stopped. . As a result, the two-fluid nozzle 3 is washed with the water W, and after the washing, moisture is blown off with the air Ab, so that the chemical liquid D does not remain in the jet port of the two-fluid nozzle 3 and the jet port of the two-fluid nozzle 3 It is possible to prevent the dust in the exhaust gas G from adhering and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧装置１０４では、液配管１と空気配管２とに接続されると共に、煙道１０２内に配置され、液配管１から供給された薬剤液Ｄを空気配管２から供給された空気Ａｂの気流によって微粒化することで微細霧を形成し煙道１０２に噴霧する予備二流体ノズル３’と、二流体ノズル３の液配管１への接続と予備二流体ノズル３’の液配管１への接続とを選択的に切り換えるノズル液切換手段１６と、二流体ノズル３の空気配管２への接続と予備二流体ノズル３’の空気配管２への接続とを選択的に切り換えるノズル空気切換手段１７とを備える。   Further, in the drug spraying apparatus 104 of the present embodiment, the drug solution D that is connected to the liquid pipe 1 and the air pipe 2 and is disposed in the flue 102 and supplied from the liquid pipe 1 is supplied from the air pipe 2. The auxiliary two-fluid nozzle 3 ′ that forms a fine mist by atomizing by the air flow of the supplied air Ab and sprays it on the flue 102, the connection of the two-fluid nozzle 3 to the liquid pipe 1, and the auxiliary two-fluid nozzle 3 ′. The nozzle liquid switching means 16 that selectively switches the connection to the liquid pipe 1 and the connection of the two-fluid nozzle 3 to the air pipe 2 and the connection of the spare two-fluid nozzle 3 ′ to the air pipe 2 are selectively performed. Nozzle air switching means 17 for switching.

この薬剤噴霧装置１０４によれば、二流体ノズル３の点検をする場合や二流体ノズル３が万一詰まった場合でも、予備二流体ノズル３’を用いることで、薬剤液Ｄの噴霧を継続して行うことができ、排ガス処理システム１００の稼動に影響を与える事態を防止することが可能になる。   According to the medicine spraying device 104, even when the two-fluid nozzle 3 is inspected or the two-fluid nozzle 3 is clogged, the spraying of the medicine liquid D is continued by using the spare two-fluid nozzle 3 ′. It is possible to prevent the situation that affects the operation of the exhaust gas treatment system 100.

また、本実施の形態の薬剤噴霧装置１０４では、制御手段１９は、二流体ノズル３と予備二流体ノズル３’とを切り換える場合、液切換手段７を水供給手段６側に切り換えると共に薬剤液供給手段５の駆動を停止し、その後、ノズル空気切換手段１７を切り換えた後にノズル液切換手段１６を切り換え、その後、液切換手段７を薬剤液供給手段５側に切り換えると共に薬剤液供給手段５を駆動する。   In the medicine spraying device 104 of the present embodiment, the control means 19 switches the liquid switching means 7 to the water supply means 6 side and supplies the chemical liquid when switching between the two-fluid nozzle 3 and the spare two-fluid nozzle 3 ′. The driving of the means 5 is stopped, and then the nozzle liquid switching means 16 is switched after the nozzle air switching means 17 is switched. Thereafter, the liquid switching means 7 is switched to the chemical liquid supply means 5 side and the chemical liquid supply means 5 is driven. To do.

この薬剤噴霧装置１０４によれば、二流体ノズル３を予備二流体ノズル３’に切り換える場合、二流体ノズル３からの薬剤液Ｄの噴射を止めて水Ｗを噴射させ、その後、予備二流体ノズル３’には、空気Ａｂを先に切り換えてから、水Ｗに切り換えつつ薬剤液Ｄに切り換える。この結果、切り換えられた予備二流体ノズル３’に対し、先に噴射された空気Ａｂにより予備二流体ノズル３’内部が冷却されることから、噴霧する薬剤液Ｄの蒸発による固形成分の析出を防止でき、予備二流体ノズル３’内部の詰まりを防止することが可能になる。また、先に噴射された空気Ａｂにより、後に噴射される薬剤液Ｄが微粒化されることから、噴射口に薬剤液Ｄを残留させないので、噴射口への排ガスＧ中の煤塵の付着を防いで、詰まりを防止することが可能になる。しかも、薬剤液Ｄが供給される前に水Ｗが供給されるので、使用前の予備二流体ノズル３’を洗浄することが可能になる。   According to this medicine spraying device 104, when the two-fluid nozzle 3 is switched to the spare two-fluid nozzle 3 ′, the medicine liquid D from the two-fluid nozzle 3 is stopped and water W is jetted, and then the spare two-fluid nozzle In 3 ′, the air Ab is switched to the drug solution D while switching to the water W after switching the air Ab first. As a result, since the inside of the preliminary two-fluid nozzle 3 ′ is cooled by the previously injected air Ab with respect to the switched preliminary two-fluid nozzle 3 ′, solid components are precipitated by evaporation of the sprayed drug solution D. It is possible to prevent clogging inside the spare two-fluid nozzle 3 ′. Further, since the drug liquid D to be ejected later is atomized by the air Ab previously ejected, the drug liquid D is not left in the ejection port, so that the dust in the exhaust gas G is prevented from adhering to the ejection port. Therefore, it becomes possible to prevent clogging. In addition, since the water W is supplied before the drug solution D is supplied, it is possible to clean the preliminary two-fluid nozzle 3 'before use.

また、本実施の形態の薬剤噴霧装置１０４では、煙道１０２には、その内部空間Ｓに連通する一方で内部空間Ｓから隔離される外部空間をなす外部空間形成部４を備え、少なくとも二流体ノズル３が外部空間形成部４に配置されている。   Further, in the drug spraying device 104 of the present embodiment, the flue 102 includes the external space forming portion 4 that communicates with the internal space S and forms an external space isolated from the internal space S, and includes at least two fluids. The nozzle 3 is disposed in the external space forming unit 4.

この薬剤噴霧装置１０４によれば、煙道１０２の内部空間Ｓを開放させずに排ガス処理システム１００の稼動中であっても二流体ノズル３や予備二流体ノズル３’の取り付けおよび取り外しを行うことができるので、排ガス処理システム１００の稼動に影響を与える事態を防止することが可能になる。   According to the medicine spraying device 104, the two-fluid nozzle 3 and the spare two-fluid nozzle 3 ′ can be attached and detached even when the exhaust gas treatment system 100 is operating without opening the internal space S of the flue 102. Therefore, a situation that affects the operation of the exhaust gas treatment system 100 can be prevented.

本実施の形態の薬剤噴霧方法は、二流体ノズル３により薬剤液Ｄを空気Ａｂの気流によって微粒化することで微細霧を形成し煙道１０２に噴霧する薬剤噴霧方法において、薬剤液Ｄを噴霧させた状態で、二流体ノズル３に供給する薬剤液Ｄの供給圧力が所定の閾値を超えた場合、薬剤液Ｄを水Ｗに切り換えて噴射させる。   The drug spraying method of the present embodiment is a drug spraying method in which a fine mist is formed by atomizing the drug liquid D by the air flow of the air Ab by the two-fluid nozzle 3 and sprayed onto the flue 102. In this state, when the supply pressure of the drug solution D supplied to the two-fluid nozzle 3 exceeds a predetermined threshold value, the drug solution D is switched to water W and sprayed.

この薬剤噴霧方法によれば、高温（例えば、３００℃〜３５０℃）の排ガスＧにより薬剤液Ｄが蒸発して固形成分が析出し始めても、薬剤液Ｄを水Ｗに切り換えて二流体ノズル３に水を供給することで、二流体ノズル３の詰まりを防止することが可能になる。   According to this chemical spraying method, even if the chemical liquid D evaporates due to the exhaust gas G at a high temperature (for example, 300 ° C. to 350 ° C.) and solid components start to precipitate, the chemical liquid D is switched to the water W and the two-fluid nozzle 3 By supplying water to the two-fluid nozzle 3, it is possible to prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、二流体ノズル３に薬剤液Ｄの供給を開始する場合、空気Ａｂを供給した後に、薬剤液Ｄを供給する。   In the medicine spraying method of the present embodiment, when the supply of the medicine liquid D to the two-fluid nozzle 3 is started, the medicine liquid D is supplied after the air Ab is supplied.

この薬剤噴霧方法によれば、先に噴射された空気Ａｂにより二流体ノズル３内部が冷却されることから、噴霧する薬剤液Ｄの蒸発による固形成分の析出を防止でき、二流体ノズル３内部の詰まりを防止することが可能になる。また、先に噴射された空気Ａｂにより、後に噴射される薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying method, since the inside of the two-fluid nozzle 3 is cooled by the air Ab previously jetted, solid component precipitation due to evaporation of the medicine liquid D to be sprayed can be prevented, and the inside of the two-fluid nozzle 3 can be prevented. It becomes possible to prevent clogging. Further, since the drug liquid D to be jetted later is atomized by the air Ab jetted first, the drug liquid D does not remain in the jet port of the two-fluid nozzle 3, so It is possible to prevent the dust in the exhaust gas G from adhering and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、二流体ノズル３への薬剤液Ｄの供給を停止する場合、薬剤液Ｄを水Ｗに切り換え、その後、水Ｗの供給を止めた後、空気Ａｂの供給を止める。   In the medicine spraying method of the present embodiment, when the supply of the medicine liquid D to the two-fluid nozzle 3 is stopped, the medicine liquid D is switched to the water W, and then the supply of the water W is stopped, and then the air Ab Stop supplying.

この薬剤噴霧方法によれば、二流体ノズル３を水Ｗで洗浄し、かつ洗浄後には空気Ａｂで水分を飛ばして、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying method, the two-fluid nozzle 3 is washed with water W, and after washing, moisture is blown off with the air Ab, so that the medicine liquid D does not remain in the ejection port of the two-fluid nozzle 3. Thus, it is possible to prevent the dust in the exhaust gas G from adhering to the nozzle 3 and to prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、煙道１０２に流通する排ガスＧの流量増加に伴い、空気Ａｂの流通量を増加させた後、薬剤液Ｄの流通量を増加させる。   Further, in the drug spraying method of the present embodiment, as the flow rate of the exhaust gas G flowing through the flue 102 is increased, the flow rate of the drug solution D is increased after increasing the flow rate of the air Ab.

この薬剤噴霧方法によれば、先に流通量が増加された空気Ａｂにより、後に流通量が増加された薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying method, since the drug liquid D whose flow rate has been increased later is atomized by the air Ab whose flow rate has been increased previously, the drug solution D is applied to the injection port of the two-fluid nozzle 3. Since it does not remain, it is possible to prevent the dust in the exhaust gas G from adhering to the injection port of the two-fluid nozzle 3 and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、煙道１０２に流通する排ガスＧの流量減少に伴い、薬剤液Ｄの流通量を減少させた後、空気Ａｂの流通量を減少させる。   Moreover, in the chemical spraying method of the present embodiment, the flow rate of the air Ab is decreased after the flow rate of the chemical liquid D is decreased with the decrease in the flow rate of the exhaust gas G flowing through the flue 102.

この薬剤噴霧方法によれば、先に流通量が減少された薬剤液Ｄが、流通量が減少される前の空気Ａｂにより微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying method, the medicine liquid D whose flow rate has been reduced first is atomized by the air Ab before the flow rate is reduced. Therefore, it is possible to prevent the dust in the exhaust gas G from adhering to the injection port of the two-fluid nozzle 3 and prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、二流体ノズル３に空気Ａｂを供給する予備空気供給手段１１を有し、二流体ノズル３に供給する空気Ａｂの流量が所定の閾値を下回った場合、予備空気供給手段１１に切り換える。   Further, in the medicine spraying method according to the present embodiment, when the preliminary fluid supply means 11 for supplying the air Ab to the two-fluid nozzle 3 is provided and the flow rate of the air Ab supplied to the two-fluid nozzle 3 is below a predetermined threshold value Then, the auxiliary air supply means 11 is switched.

この薬剤噴霧方法によれば、予備空気供給手段１１の空気Ａｃにより、排ガス熱による二流体ノズル３内部の薬剤液Ｄの蒸発を防止することから、析出した固形成分による二流体ノズル３内部の詰まりを防止することが可能になる。また、予備空気供給手段１１の空気Ａｃにより薬剤液Ｄが微粒化されることから、二流体ノズル３の噴射口に薬剤液Ｄを残留させないので、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this chemical spraying method, the air Ac of the preliminary air supply means 11 prevents evaporation of the chemical liquid D inside the two-fluid nozzle 3 due to exhaust gas heat. Can be prevented. Further, since the drug solution D is atomized by the air Ac of the preliminary air supply means 11, the drug solution D does not remain in the injection port of the two-fluid nozzle 3. It becomes possible to prevent clogging of the two-fluid nozzle 3 by preventing the adhesion of soot.

また、本実施の形態の薬剤噴霧方法では、二流体ノズル３に供給する空気Ａｂの流量が所定の閾値を下回った場合、薬剤液Ｄを水Ｗに切り換え、その後、水Ｗの供給を止めた後、空気Ａｂの供給を止める。   In the medicine spraying method of the present embodiment, when the flow rate of the air Ab supplied to the two-fluid nozzle 3 falls below a predetermined threshold, the medicine liquid D is switched to the water W, and then the supply of the water W is stopped. Thereafter, the supply of the air Ab is stopped.

この薬剤噴霧方法によれば、二流体ノズル３を水Ｗで洗浄し、かつ洗浄後には空気Ａｂで水分を飛ばすので、二流体ノズル３の噴射口に薬剤液Ｄを残留させず、二流体ノズル３の噴射口への排ガスＧ中の煤塵の付着を防いで、二流体ノズル３の詰まりを防止することが可能になる。   According to this medicine spraying method, the two-fluid nozzle 3 is washed with water W, and water is blown off with the air Ab after washing. Therefore, the medicine fluid D does not remain in the ejection port of the two-fluid nozzle 3, and the two-fluid nozzle Thus, it is possible to prevent the dust in the exhaust gas G from adhering to the nozzle 3 and to prevent the two-fluid nozzle 3 from being clogged.

また、本実施の形態の薬剤噴霧方法では、予備二流体ノズル３’を有し、二流体ノズル３と予備二流体ノズル３’とを切り換える場合、薬剤液Ｄを水Ｗに切り換え、その後、二流体ノズル３と予備二流体ノズル３’とを切り換え、その後、水Ｗを薬剤液Ｄに切り換える。   Further, in the medicine spraying method of the present embodiment, when the auxiliary two-fluid nozzle 3 ′ is provided and the two-fluid nozzle 3 and the auxiliary two-fluid nozzle 3 ′ are switched, the medicine liquid D is switched to the water W, and then two The fluid nozzle 3 and the spare two-fluid nozzle 3 ′ are switched, and then the water W is switched to the drug solution D.

この薬剤噴霧方法によれば、切り換えられたノズル３’に対し、先に噴射された空気Ａｂにより予備二流体ノズル３’内部が冷却されることから、噴霧する薬剤液Ｄの蒸発による固形成分の析出を防止でき、予備二流体ノズル３’内部の詰まりを防止することが可能になる。また、先に噴射されている空気Ａｂにより、後に噴射される薬剤液Ｄが微粒化されることから、噴射口に薬剤液Ｄを残留させないので、噴射口への排ガスＧ中の煤塵の付着を防いで、詰まりを防止することが可能になる。しかも、薬剤液Ｄが供給される前に水Ｗが供給されるので、使用前に切り換えられたノズル３，３’を洗浄できる。   According to this medicine spraying method, since the inside of the preliminary two-fluid nozzle 3 ′ is cooled by the air Ab previously jetted to the switched nozzle 3 ′, the solid component due to evaporation of the medicine liquid D to be sprayed is cooled. Precipitation can be prevented and clogging inside the spare two-fluid nozzle 3 ′ can be prevented. Further, since the drug liquid D to be ejected later is atomized by the air Ab previously ejected, the drug liquid D does not remain in the ejection port, so that the dust in the exhaust gas G adheres to the ejection port. It is possible to prevent clogging. In addition, since the water W is supplied before the drug solution D is supplied, the nozzles 3 and 3 'switched before use can be washed.

以上のように、本発明に係る薬剤噴霧装置および薬剤噴霧方法は、噴霧する薬剤液の固形成分の析出による二流体ノズルの詰まりを防止することに適している。   As described above, the medicine spraying device and the medicine spraying method according to the present invention are suitable for preventing clogging of the two-fluid nozzle due to the precipitation of solid components of the medicine liquid to be sprayed.

１ 液配管
２ 空気配管
３ 二流体ノズル
３ａ 内管
３ｂ 外管
３’予備二流体ノズル
４ 外部空間形成部
５ 薬剤液供給手段
５ａ 薬剤液タンク
５ｂ 薬剤液配管
５ｃ 薬剤液ポンプ
５ｄ 圧力計
６ 水供給手段
６ａ 水源
６ｂ 水配管
７ 液切換手段
８ 液開閉手段
９ 液量調整手段
１０ 空気供給手段
１０ａ 送風機
１０ｂ 送気配管
１１ 予備空気供給手段
１１ａ 予備送風機
１１ｂ 送気配管
１２ 空気切換手段
１３ 空気開閉手段
１４ 空気量調整手段
１５ 空気流量計
１６ ノズル液切換手段
１７ ノズル空気切換手段
１８ 排ガス流量計
１９ 制御手段
５０ 発電プラント
１００ 排ガス処理システム
１０１ ボイラ
１０２ 煙道
１０４ 薬剤噴霧装置
１０９ 送風機
１１０ 送風機 DESCRIPTION OF SYMBOLS 1 Liquid piping 2 Air piping 3 Two-fluid nozzle 3a Inner tube 3b Outer tube 3 'Reserve two-fluid nozzle 4 External space formation part 5 Chemical liquid supply means 5a Chemical liquid tank 5b Chemical liquid piping 5c Chemical liquid pump 5d Pressure gauge 6 Water supply Means 6a Water source 6b Water pipe 7 Liquid switching means 8 Liquid switching means 9 Liquid amount adjusting means 10 Air supply means 10a Blower 10b Air supply pipe 11 Spare air supply means 11a Preliminary blower 11b Air supply pipe 12 Air switching means 13 Air opening / closing means 14 Air amount adjusting means 15 Air flow meter 16 Nozzle liquid switching means 17 Nozzle air switching means 18 Exhaust gas flow meter 19 Control means 50 Power generation plant 100 Exhaust gas treatment system 101 Boiler 102 Flue 104 Drug spraying device 109 Blower 110 Blower

Claims (15)

薬剤液を送る液配管と空気を送る空気配管とに接続されると共に、煙道内に配置され、前記液配管から供給された薬剤液を前記空気配管から供給された空気の気流によって微粒化することで微細霧を形成し前記煙道に噴霧する二流体ノズルを有した薬剤噴霧装置において、
前記液配管に接続されて当該液配管に薬剤液を供給する薬剤液供給手段と、
前記液配管に接続されて当該液配管に水を供給する水供給手段と、
前記薬剤液供給手段から前記液配管への薬剤液の流通と前記水供給手段から前記液配管への水の流通とを選択的に切り換える液切換手段と、
前記薬剤液供給手段における薬剤液の供給圧力を検出する圧力計と、
前記液切換手段を前記薬剤液供給手段側に切り換えると共に前記薬剤液供給手段を駆動して薬剤液を噴霧させた状態で、前記圧力計で検出された圧力を入力し、入力した圧力が所定の閾値を超えた場合、前記液切換手段を前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止する制御手段と、
を備え、
前記煙道には、その内部空間に連通する一方で前記内部空間から隔離される外部空間をなす外部空間形成部を備え、前記外部空間形成部は、前記煙道の外側に基端が固定されて前記内部空間に連通すると共に先端が開口する固定筒と、前記固定筒の基端と先端との間を開放する一方で前記固定部の基端と先端との間を閉塞する態様で前記固定筒の外部から操作される弁と、前記固定筒の先端の開口に基端が着脱可能に取り付けられ、自身の先端において前記二流体ノズルを気密性を有しつつ前記煙道の内外に移動可能に支持する支持筒と、を備えることを特徴とする薬剤噴霧装置。 Connected to the liquid pipe for sending the chemical liquid and the air pipe for sending the air, and arranged in the flue, and atomizing the chemical liquid supplied from the liquid pipe by the air flow supplied from the air pipe In a drug spraying device having a two-fluid nozzle that forms a fine mist and sprays onto the flue,
A chemical liquid supply means connected to the liquid pipe for supplying a chemical liquid to the liquid pipe;
Water supply means connected to the liquid pipe for supplying water to the liquid pipe;
A liquid switching means for selectively switching the flow of the chemical liquid from the chemical liquid supply means to the liquid pipe and the flow of water from the water supply means to the liquid pipe;
A pressure gauge for detecting the supply pressure of the drug solution in the drug solution supply means;
In the state where the liquid switching means is switched to the drug liquid supply means side and the drug liquid supply means is driven to spray the drug liquid, the pressure detected by the pressure gauge is input, and the input pressure is a predetermined pressure. Control means for switching the liquid switching means to the water supply means side and stopping the driving of the chemical liquid supply means when a threshold value is exceeded;
Equipped with a,
The flue includes an external space forming portion that communicates with the internal space and forms an external space that is isolated from the internal space, and the external space forming portion has a proximal end fixed to the outside of the flue. The fixed cylinder that communicates with the internal space and that opens at the distal end, and that opens between the proximal end and the distal end of the fixed cylinder and closes between the proximal end and the distal end of the fixed portion. A valve operated from the outside of the cylinder and a base end are detachably attached to the opening of the tip of the fixed cylinder, and the two-fluid nozzle can be moved inside and outside of the flue while having airtightness at its tip. A drug spraying device comprising: a support tube supported on the medicine. 前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、
前記空気配管での空気の流通を開閉する空気開閉手段と、
前記液配管での薬剤液または水の流通を開閉する液開閉手段と、
を備え、
前記制御手段は、前記薬剤液の供給を開始する場合、前記空気供給手段を駆動すると共に前記空気開閉手段を開状態とし、その後、前記液切換手段を前記薬剤液供給手段側に切り換え、かつ前記薬剤液供給手段を駆動すると共に前記液開閉手段を開状態とすることを特徴とする請求項１に記載の薬剤噴霧装置。 An air supply means connected to the air pipe and supplying air to the air pipe;
Air opening and closing means for opening and closing air flow in the air pipe;
Liquid opening and closing means for opening and closing the flow of the chemical liquid or water in the liquid pipe;
With
When the supply of the drug solution is started, the control means drives the air supply means and opens the air opening / closing means, and then switches the liquid switching means to the drug solution supply means side, and The drug spraying device according to claim 1, wherein the drug liquid supply means is driven and the liquid opening / closing means is opened. 前記制御手段は、前記薬剤液の供給を停止する場合、前記液切換手段を前記薬剤液供給手段側から前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記液開閉手段を閉状態とし、その後、前記空気開閉手段を閉状態とすると共に前記空気供給手段の駆動を停止することを特徴とする請求項２に記載の薬剤噴霧装置。   When the supply of the chemical liquid is stopped, the control means switches the liquid switching means from the chemical liquid supply means side to the water supply means side and stops the driving of the chemical liquid supply means. The medicine spraying device according to claim 2, wherein the opening / closing means is closed, and then the air opening / closing means is closed and the driving of the air supply means is stopped. 前記空気配管での空気の流通量を調整する空気量調整手段と、
前記液配管での薬剤液の流通量を調整する液量調整手段と、
を備え、
前記制御手段は、前記煙道に流通する排ガスの流量増加に伴い、空気量調整手段により空気の流通量を増加させた後、液量調整手段により薬剤液の流通量を増加させることを特徴とする請求項１〜３のいずれか一つに記載の薬剤噴霧装置。 An air amount adjusting means for adjusting an air circulation amount in the air pipe;
A liquid amount adjusting means for adjusting a flow rate of the chemical liquid in the liquid pipe;
With
The control means increases the flow rate of the chemical liquid by the liquid volume adjusting means after increasing the flow volume of the air by the air volume adjusting means as the flow rate of the exhaust gas flowing through the flue increases. The medicine spraying device according to any one of claims 1 to 3. 前記制御手段は、前記排ガスの流量減少に伴い、液量調整手段により薬剤液の流通量を減少させた後、空気量調整手段により空気の流通量を減少させることを特徴とする請求項４に記載の薬剤噴霧装置。   5. The control means according to claim 4, wherein the flow rate of the exhaust gas is decreased by the liquid amount adjustment unit and then the air flow rate is decreased by the air amount adjustment unit. The medicine spraying device as described. 前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、
前記空気配管に接続されて当該空気配管に空気を供給する予備空気供給手段と、
前記空気供給手段から前記空気配管への空気の流通と前記予備空気供給手段から前記空気配管への空気の流通とを選択的に切り換える空気切換手段と、
前記空気配管における空気の流量を検出する空気流量計と、
を備え、
前記制御手段は、前記空気切換手段を空気供給手段側に切り換えている状態で、前記空気流量計で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、前記空気切換手段を前記予備空気供給手段側に切り換えることを特徴とする請求項１〜５のいずれか一つに記載の薬剤噴霧装置。 An air supply means connected to the air pipe and supplying air to the air pipe;
Preliminary air supply means connected to the air pipe for supplying air to the air pipe;
Air switching means for selectively switching between air flow from the air supply means to the air pipe and air flow from the preliminary air supply means to the air pipe;
An air flow meter for detecting a flow rate of air in the air pipe;
With
The control means inputs the flow rate detected by the air flow meter in a state where the air switching means is switched to the air supply means side, and when the input flow rate falls below a predetermined threshold, the air switching means The medicine spraying device according to any one of claims 1 to 5, wherein the medicine is switched to the preliminary air supply means side. 前記空気配管に接続されて当該空気配管に空気を供給する空気供給手段と、
前記空気配管での空気の流通を開閉する空気開閉手段と、
前記液配管での薬剤液または水の流通を開閉する液開閉手段と、
前記空気配管における空気の流量を検出する空気流量計と、
を備え、
前記制御手段は、前記液開閉手段および前記空気開閉手段を開状態とし、前記空気流量計で検出された流量を入力し、入力した流量が所定の閾値を下回った場合、前記液切換手段を前記薬剤液供給手段側から前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記液開閉手段を閉状態とした後、前記空気開閉手段を閉状態とすると共に前記空気供給手段の駆動を停止することを特徴とする請求項１〜５のいずれか一つに記載の薬剤噴霧装置。 An air supply means connected to the air pipe and supplying air to the air pipe;
Air opening and closing means for opening and closing air flow in the air pipe;
Liquid opening and closing means for opening and closing the flow of the chemical liquid or water in the liquid pipe;
An air flow meter for detecting a flow rate of air in the air pipe;
With
The control means opens the liquid opening and closing means and the air opening and closing means, inputs the flow rate detected by the air flow meter, and when the input flow rate falls below a predetermined threshold, the liquid switching means is Switching from the chemical liquid supply means side to the water supply means side and stopping the driving of the chemical liquid supply means, and then closing the liquid opening and closing means, then closing the air opening and closing means and the air The medicine spraying device according to any one of claims 1 to 5, wherein driving of the supply means is stopped. 前記液配管と前記空気配管とに接続されると共に、煙道内に配置され、前記液配管から供給された薬剤液を前記空気配管から供給された空気の気流によって微粒化することで微細霧を形成し前記煙道に噴霧する予備二流体ノズルと、
前記二流体ノズルの前記液配管への接続と前記予備二流体ノズルの前記液配管への接続とを選択的に切り換えるノズル液切換手段と、
前記二流体ノズルの前記空気配管への接続と前記予備二流体ノズルの前記空気配管への接続とを選択的に切り換えるノズル空気切換手段と、
を備えることを特徴とする請求項１〜７のいずれか一つに記載の薬剤噴霧装置。 A fine mist is formed by being connected to the liquid pipe and the air pipe, and arranged in the flue, and atomizing the chemical liquid supplied from the liquid pipe by the air current supplied from the air pipe A preliminary two-fluid nozzle that sprays the flue;
Nozzle liquid switching means for selectively switching between the connection of the two-fluid nozzle to the liquid pipe and the connection of the auxiliary two-fluid nozzle to the liquid pipe;
Nozzle air switching means for selectively switching between the connection of the two-fluid nozzle to the air pipe and the connection of the auxiliary two-fluid nozzle to the air pipe;
The drug spraying device according to any one of claims 1 to 7, further comprising: 前記制御手段は、前記二流体ノズルと前記予備二流体ノズルとを切り換える場合、前記液切換手段を前記水供給手段側に切り換えると共に前記薬剤液供給手段の駆動を停止し、その後、前記ノズル空気切換手段を切り換えた後に前記ノズル液切換手段を切り換え、その後、前記液切換手段を前記薬剤液供給手段側に切り換えると共に前記薬剤液供給手段を駆動することを特徴とする請求項８に記載の薬剤噴霧装置。   When switching between the two-fluid nozzle and the spare two-fluid nozzle, the control means switches the liquid switching means to the water supply means side and stops driving the chemical liquid supply means, and then the nozzle air switching 9. The medicine spray according to claim 8, wherein the nozzle liquid switching means is switched after the means is switched, and then the liquid switching means is switched to the chemical liquid supply means side and the chemical liquid supply means is driven. apparatus. 二流体ノズルにより薬剤液を空気の気流によって微粒化することで微細霧を形成し煙道に噴霧する薬剤噴霧方法において、
薬剤液を噴霧させた状態で、前記二流体ノズルに供給する薬剤液の供給圧力が所定の閾値を超えた場合、前記薬剤液を水に切り換えて噴射させ、
前記二流体ノズルに薬剤液の供給を開始する場合、空気を供給した後に、薬剤液を供給し、
前記二流体ノズルへの薬剤液の供給を停止する場合、薬剤液を水に切り換え、その後、水の供給を止めた後、空気の供給を止めるようにし、
前記煙道には、その内部空間に連通する一方で前記内部空間から隔離される外部空間をなす外部空間形成部を備え、前記外部空間形成部は、前記煙道の外側に基端が固定されて前記内部空間に連通すると共に先端が開口する固定筒と、前記固定筒の基端と先端との間を開放する一方で前記固定部の基端と先端との間を閉塞する態様で前記固定筒の外部から操作される弁と、前記固定筒の先端の開口に基端が着脱可能に取り付けられ、自身の先端において前記二流体ノズルを気密性を有しつつ前記煙道の内外に移動可能に支持する支持筒と、を備えており、
前記二流体ノズルへの薬剤液の供給を停止した後、前記二流体ノズルを交換する場合、前記二流体ノズルを前記支持筒を介して前記煙道の外側に移動させた後、前記弁を閉鎖状態とし、前記支持筒を前記固定筒から外し、その後、逆の手順で交換後の前記二流体ノズルを取り付けることを特徴とする薬剤噴霧方法。 In the drug spraying method of forming a fine mist by atomizing the drug solution by air flow with a two-fluid nozzle and spraying it on the flue,
When the supply pressure of the chemical liquid supplied to the two-fluid nozzle exceeds a predetermined threshold in a state where the chemical liquid is sprayed, the chemical liquid is switched to water and sprayed ,
When starting the supply of the drug solution to the two-fluid nozzle, supply the drug solution after supplying air,
When stopping the supply of the drug solution to the two-fluid nozzle, switch the drug solution to water, and then stop the supply of water, and then stop the supply of air,
The flue includes an external space forming portion that communicates with the internal space and forms an external space that is isolated from the internal space, and the external space forming portion has a proximal end fixed to the outside of the flue. The fixed cylinder that communicates with the internal space and that opens at the distal end, and that opens between the proximal end and the distal end of the fixed cylinder and closes between the proximal end and the distal end of the fixed portion. A valve operated from the outside of the cylinder and a base end are detachably attached to the opening of the tip of the fixed cylinder, and the two-fluid nozzle can be moved inside and outside of the flue while having airtightness at its tip. A support cylinder for supporting the
When replacing the two-fluid nozzle after stopping the supply of the chemical liquid to the two-fluid nozzle, the two-fluid nozzle is moved to the outside of the flue through the support tube, and then the valve is closed. The medicine spraying method is characterized in that the two-fluid nozzle after replacement is attached in a reverse procedure after removing the support cylinder from the fixed cylinder . 前記煙道に流通する排ガスの流量増加に伴い、空気の流通量を増加させた後、薬剤液の流通量を増加させることを特徴とする請求項１０に記載の薬剤噴霧方法。 The drug spraying method according to claim 10 , wherein the flow rate of the drug solution is increased after the flow rate of the air is increased as the flow rate of the exhaust gas flowing through the flue increases. 前記煙道に流通する排ガスの流量減少に伴い、薬剤液の流通量を減少させた後、空気の流通量を減少させることを特徴とする請求項１０または１１に記載の薬剤噴霧方法。 The method for spraying medicine according to claim 10 or 11 , wherein the flow rate of air is decreased after the flow rate of the drug solution is decreased with a decrease in the flow rate of the exhaust gas flowing through the flue. 前記二流体ノズルに空気を供給する予備空気供給手段を有し、前記二流体ノズルに供給する空気の流量が所定の閾値を下回った場合、前記予備空気供給手段に切り換えることを特徴とする請求項１０〜１２のいずれか一つに記載の薬剤噴霧方法。 The auxiliary air supply means for supplying air to the two-fluid nozzle, and when the flow rate of air supplied to the two-fluid nozzle falls below a predetermined threshold, switching to the preliminary air supply means. The medicine spraying method according to any one of 10 to 12 . 前記二流体ノズルに供給する空気の流量が所定の閾値を下回った場合、薬剤液を水に切り換え、その後、水の供給を止めた後、空気の供給を止めることを特徴とする請求項１０〜１３のいずれか一つに記載の薬剤噴霧方法。 If the flow rate of air supplied to the two-fluid nozzle is below a predetermined threshold value, switch the drug solution in water, then, after stopping the supply of water, according to claim, characterized in that stopping the supply of air 10 14. The method for spraying medicine according to any one of 13 . 予備二流体ノズルを有し、前記二流体ノズルと前記予備二流体ノズルとを切り換える場合、薬剤液を水に切り換え、その後、前記二流体ノズルと前記予備二流体ノズルとを切り換え、その後、水を薬剤液に切り換えることを特徴とする請求項１０〜１４のいずれか一つに記載の薬剤噴霧方法。 In the case of having a preliminary two-fluid nozzle and switching between the two-fluid nozzle and the preliminary two-fluid nozzle, the chemical liquid is switched to water, and then the two-fluid nozzle and the preliminary two-fluid nozzle are switched. It switches to a chemical | medical solution, The chemical | medical agent spraying method as described in any one of Claims 10-14 characterized by the above-mentioned.
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JP2004360578A (en) * 2003-06-05 2004-12-24 Miura Co Ltd Denitration apparatus
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