WO2010131302A1 - Boiler - Google Patents
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- WO2010131302A1 WO2010131302A1 PCT/JP2009/003982 JP2009003982W WO2010131302A1 WO 2010131302 A1 WO2010131302 A1 WO 2010131302A1 JP 2009003982 W JP2009003982 W JP 2009003982W WO 2010131302 A1 WO2010131302 A1 WO 2010131302A1
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- blow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
Definitions
- the present invention relates to a boiler that is a heat source device that transfers heat obtained by burning fuel to water and converts it to water vapor or hot water, and particularly relates to a concentrated blow of the boiler.
- the concentration of the can water proceeds in proportion to the amount of steam generated, and the dryness of the steam decreases.
- the boiler water will accompany the steam, and the boiler water contains various components. Vibration or abnormal noise may occur in the piping.
- a concentrating blow line provided with a concentrating blow valve is connected to the boiler can body, and the condensing blow is performed with the concentrating blow valve opened to discharge part of the boiler water. Concentration is prevented, and for example, such a boiler is disclosed in Patent Document 1 below.
- the combustion amount is controlled in a plurality of combustion states such as high combustion, low combustion, and stop.
- the amount of steam supply also changes according to the combustion state, so it is necessary to adjust the amount of concentrated blow according to that, and in Patent Document 1, the opening time of the concentration blow valve is adjusted according to the state of combustion. The amount of concentrated blow is adjusted.
- the instantaneous blow amount becomes larger than the evaporation amount at the time of the concentrate blow in the low combustion, and the feed water is discharged out of the can instead of the concentrate.
- the lower header temperature decreases and water pipe overheating occurs.
- the difference in the desired concentration blow rate increases depending on the concentration blow rate (the ratio of the blow water amount to the water supply amount), and the optimum concentration blow amount for all concentration blow rates can be achieved simply by adjusting the opening time of the concentration blow valve. Difficult to do.
- the present invention has been made in view of such a problem, and it is possible to always perform concentration blow with an appropriate blow amount even in a boiler having a large fluctuation range of the concentrate blow amount, such as a boiler with a large turndown ratio.
- the aim is to provide a possible boiler.
- a boiler according to the present invention includes a can body and a concentrated blow line for discharging blow water from the can body, wherein the concentrated blow lines each have a blow valve. And having a plurality of branch lines installed in parallel, and selectively opening and closing the plurality of blow valves in order to adjust the flow rate of the concentration blow line selectively using the plurality of branch lines It is characterized by comprising a controller for controlling.
- the concentrated blow can be performed with an appropriate blow amount.
- FIG. 1 is a schematic diagram schematically showing the configuration of a boiler according to an embodiment of the present invention.
- FIG. 2 is a view showing an open / close control mode of each blow solenoid valve during concentration blow according to the embodiment of the present invention.
- FIG. 3 is a view showing an open / close control mode of each blow solenoid valve during concentration blow according to a modification of the present invention.
- FIG. 1 is a schematic diagram schematically showing the configuration of the boiler according to the present embodiment.
- the boiler 1 includes a can body 2, a blower 3, a duct 4, an exhaust pipe 5, a separator 6, a concentration blow line 10, and a controller 30.
- combustion air is supplied from the blower 3, and the fuel gas mixed in the duct 4 and the combustion air are burned in the can body 2 to connect the upper header and the lower header in the can body 2. Heat the water tube.
- the exhaust gas after combustion is discharged from the exhaust cylinder 5 to the outside.
- the separator 6 is connected to the upper header by the steam extraction line 7 and is connected to the lower header by the downcomer 8, and the steam is taken out from the separator 6 by opening the main steam valve 9.
- the concentration blow line 10 is connected to the downcomer 8, and concentrated water is discharged to the outside through the concentration blow line 10 at the time of concentration blow.
- the concentration blow line 10 includes a first branch line 11, a second branch line 15, and a third branch line 19 that are branched in parallel.
- a first blow electromagnetic valve 12 and a first orifice 13 are installed, in the second branch line 15, a second blow electromagnetic valve 16 is installed, and in the third branch line 19, A third blow solenoid valve 20 is installed.
- the piping size constituting the first to third branch lines 11, 15, and 19 is 10A, and the first orifice of the first branch line 11 is configured to reduce the size to 5A.
- the controller 30 is connected to the main steam valve 9, the first blow electromagnetic valve 12, the second blow electromagnetic valve 16, and the third electromagnetic blow valve 20, and controls the opening and closing of these valves.
- the turndown ratio of the boiler 1 which concerns on this embodiment is 1: 5.
- FIG. 2 is a diagram showing an open / close control mode of each blow solenoid valve during the concentration blow according to the present embodiment.
- the boiler 1 according to the present embodiment controls the combustion amount at three positions of high combustion, low combustion, and stop, and increases or decreases the opening time of the blow solenoid valve per cycle of a predetermined period.
- the concentrated blow amount is adjusted so as to be a preset desired concentrated blow rate (ratio of the blow water amount to the water supply amount).
- the controller 30 controls opening and closing of all of the first to third blow solenoid valves 12, 16, 20, and all the lines of the first to third branch lines 11, 15, 19.
- the blow water is controlled to be discharged from the first and third blow solenoid valves 12, 16 and 20 so that the concentration blow rate is set by increasing or decreasing the open time.
- the controller 30 controls the opening / closing of only the first blow solenoid valve 12 and closes the second and third blow solenoid valves 16, 20, so that the first branch line 11.
- the blow water is controlled to be discharged only from the exhaust gas, and the concentration blow rate is set by increasing or decreasing the opening time of the first blow solenoid valve 12.
- the branch line 11 is supplied at the time of concentration blow.
- 15, 19 can be selectively used to adjust the instantaneous blow amount of the concentrated blow water flowing through the concentrate blow line 10 to a flow rate suitable for each combustion mode, so that the boiler has a large turndown ratio. Also, it is possible to perform an appropriate concentration blow in each combustion mode. Note that the term “selectively” in this specification includes a case where all options are selected.
- the ratio of the instantaneous blow amount at the time of low combustion and the instantaneous blow amount at the time of high combustion is about 1: 6, and even if the turndown ratio of the boiler 1 is as large as 1: 5, Concentrated blow water can be discharged at a flow rate suitable for the combustion mode.
- FIG. 3 is a diagram showing an open / close control mode of each blow solenoid valve during the concentration blow according to this modification.
- the branch line that is selectively used during the concentration blow is determined according to the combustion mode.
- the branch line is selectively used during the concentration blow according to a preset concentration blow rate. Determine the branch line.
- the controller 30 controls to discharge the blow water using all of the first to third branch lines 11, 15 and 19.
- the controller 30 keeps the second and third blow solenoid valves 16 and 20 closed, and changes the desired time by increasing or decreasing the open time of the first blow solenoid valve. It controls so that it may become the concentration blow rate of. Further, when the concentration blow rate is 10 to 15%, the controller 30 keeps the third blow solenoid valve 20 closed, and increases or decreases the opening time of the first and second blow solenoid valves 12 and 16 as desired. Control to achieve a concentration blow rate. When the concentration blow rate is 15% or more, the controller 30 controls the first to third blow solenoid valves 12, 16, and 20 to increase or decrease the open time so that the desired concentration blow rate is obtained.
- the branch lines 11, 15, and 19 are selectively used during the concentration blow according to the concentration blow rate, so that the instantaneous blow amount of the concentration blow line 10 is set to an appropriate flow rate according to the concentration blow rate. Since it can be adjusted, even if it is a boiler with a large capacity and the amount of blown water varies greatly depending on the concentration blow rate, it is possible to perform an appropriate concentration blow according to the concentration blow rate.
- the flow at the time of the concentration blow can be adjusted by selectively using a plurality of branch lines. Even in a boiler with a large fluctuation range, an appropriate amount of concentration blow can always be performed. Moreover, if the flow rate at the time of the concentration blow can be adjusted, it is possible to adjust the concentration blow continuously, so that efficient heat exchange can be performed between the concentration blow water and the feed water.
- the embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
- three branch lines are installed in parallel in the concentration blow line, but the number of branch lines installed in parallel may be two or four or more as long as it is plural.
- the blow valve installed in the concentration blow line is an electromagnetic blow valve, but a proportional control valve such as a motor valve capable of continuously adjusting the flow rate may be used as the blow valve.
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- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
A boiler capable of performing a concentration blow with a proper blow amount at all times even if the boiler has a large variation in concentration blow amount as in the case of boilers with large turn down ratio. The boiler comprises a can body, a blower, a duct, an exhaust tube, a separator, a concentration blow line, and a controller. The concentration blow line comprises a plurality of branch lines which have respective blow solenoid valves and which are installed parallel to each other. The controller selectively opens and closes the plurality of solenoid valves for controlling the flow in the concentration blow line by selectively using the branch lines.
Description
本発明は、燃料を燃焼させて得た熱を水に伝え、水蒸気や温水に換える熱源機器であるボイラに関し、特に、ボイラの濃縮ブローに関する。本願は、２００９年５月１５日に日本に出願された特願２００９－１１９３０５号に基づき優先権を主張し、その内容をここに援用する。
The present invention relates to a boiler that is a heat source device that transfers heat obtained by burning fuel to water and converts it to water vapor or hot water, and particularly relates to a concentrated blow of the boiler. This application claims priority based on Japanese Patent Application No. 2009-119305 filed in Japan on May 15, 2009, the contents of which are incorporated herein by reference.
一般に、ボイラにおいては、ボイラ内の缶水を長時間に亘り高温で加熱し続けると、発生する蒸気量に比例して缶水の濃縮が進行し、蒸気の乾き度が低下してしまう。蒸気の乾き度が低下してくると、蒸気中にボイラ水が同伴してきてしまい、ボイラ水には種々の成分が含まれているため、蒸気に直接触れる機器にしみ等が付着したり、蒸気配管において振動や異音が発生したりする。
Generally, in a boiler, if the can water in the boiler is continuously heated at a high temperature for a long time, the concentration of the can water proceeds in proportion to the amount of steam generated, and the dryness of the steam decreases. When the dryness of the steam decreases, the boiler water will accompany the steam, and the boiler water contains various components. Vibration or abnormal noise may occur in the piping.
このため、従来のボイラでは、濃縮ブロー弁を備えた濃縮ブローラインをボイラ缶体に接続して設置し、濃縮ブロー弁を開状態としてボイラ水の一部を排出する濃縮ブローにより、ボイラ水の濃縮を防止しており、例えば、このようなボイラが下記特許文献１に開示されている。
For this reason, in a conventional boiler, a concentrating blow line provided with a concentrating blow valve is connected to the boiler can body, and the condensing blow is performed with the concentrating blow valve opened to discharge part of the boiler water. Concentration is prevented, and for example, such a boiler is disclosed in Patent Document 1 below.
また、下記特許文献１に開示されたボイラのように、燃焼量を、高燃焼、低燃焼、停止等の複数の燃焼状態で制御することも行われている。このような場合、燃焼状態に応じて給蒸量も変わるため、それに合わせて濃縮ブロー量を調節する必要があり、特許文献１では、燃焼状態に応じて濃縮ブロー弁の開時間を調整することで、濃縮ブロー量を調節している。
Also, as in the boiler disclosed in Patent Document 1 below, the combustion amount is controlled in a plurality of combustion states such as high combustion, low combustion, and stop. In such a case, the amount of steam supply also changes according to the combustion state, so it is necessary to adjust the amount of concentrated blow according to that, and in Patent Document 1, the opening time of the concentration blow valve is adjusted according to the state of combustion. The amount of concentrated blow is adjusted.
ところで、高燃焼と低燃焼とのターンダウン比が大きいボイラの場合、それぞれの燃焼モードにおいて望ましい濃縮ブロー量の差も大きくなるため、濃縮ブロー弁の開時間の調整だけでは、双方の燃焼モードに最適な濃縮ブロー量を実現することが困難となってしまう。
By the way, in the case of a boiler with a large turndown ratio between high combustion and low combustion, the difference in the desired amount of concentrated blow in each combustion mode also increases. It becomes difficult to realize the optimum amount of concentration blow.
例えば、高燃焼における濃縮ブロー量に合わせて濃縮ブローラインの管径等を設定すると、低燃焼での濃縮ブロー時に蒸発量よりも瞬間ブロー量が大きくなり、濃縮水ではなく給水が缶外に排出されてしまったり、下部ヘッダー温度が低下して水管過熱が発生してしまうといった問題が生じる。
For example, if the tube diameter of the concentrate blow line is set according to the concentrate blow amount in the high combustion, the instantaneous blow amount becomes larger than the evaporation amount at the time of the concentrate blow in the low combustion, and the feed water is discharged out of the can instead of the concentrate. Or the lower header temperature decreases and water pipe overheating occurs.
また、濃縮ブロー率（給水量に対するブロー水量の比率）の大小によって望ましい濃縮ブロー量の差が大きくなり、濃縮ブロー弁の開時間の調整だけでは全ての濃縮ブロー率に最適な濃縮ブロー量を実現することが困難である。
Also, the difference in the desired concentration blow rate increases depending on the concentration blow rate (the ratio of the blow water amount to the water supply amount), and the optimum concentration blow amount for all concentration blow rates can be achieved simply by adjusting the opening time of the concentration blow valve. Difficult to do.
本発明は、このような課題に鑑みてなされたものであり、ターンダウン比が大きなボイラ等、濃縮ブロー量の変動幅の大きいボイラであっても常に適切なブロー量で濃縮ブローを行うことが可能なボイラを提供することを目的とする。
The present invention has been made in view of such a problem, and it is possible to always perform concentration blow with an appropriate blow amount even in a boiler having a large fluctuation range of the concentrate blow amount, such as a boiler with a large turndown ratio. The aim is to provide a possible boiler.
上記課題を解決するために、本発明に係るボイラは、缶体と、前記缶体からブロー水を排出するための濃縮ブローラインと、を備えるボイラにおいて、前記濃縮ブローラインは、それぞれブロー弁を有して並列に設置された複数の分岐ラインを有し、前記複数の分岐ラインを選択的に使用して前記濃縮ブローラインの流量を調整するために、複数の前記ブロー弁を選択的に開閉制御する制御器を備えることを特徴とする。
In order to solve the above problems, a boiler according to the present invention includes a can body and a concentrated blow line for discharging blow water from the can body, wherein the concentrated blow lines each have a blow valve. And having a plurality of branch lines installed in parallel, and selectively opening and closing the plurality of blow valves in order to adjust the flow rate of the concentration blow line selectively using the plurality of branch lines It is characterized by comprising a controller for controlling.
本発明によれば、濃縮ブロー量の変動幅の大きいボイラであっても、適切なブロー量で濃縮ブローを行うことができる。
According to the present invention, even if the boiler has a large fluctuation range of the concentrated blow amount, the concentrated blow can be performed with an appropriate blow amount.
１ ボイラ
２ 缶体
６ セパレータ
１０ 濃縮ブローライン
１１ 第一分岐ライン
１２ 第一ブロー電磁弁
１５ 第二分岐ライン
１６ 第二ブロー電磁弁
１９ 第三分岐ライン
２０ 第三ブロー電磁弁
３０ 制御器 1Boiler 2 Can 6 Separator 10 Concentration Blow Line 11 First Branch Line 12 First Blow Solenoid Valve 15 Second Branch Line 16 Second Blow Solenoid Valve 19 Third Branch Line 20 Third Blow Solenoid Valve 30 Controller
２ 缶体
６ セパレータ
１０ 濃縮ブローライン
１１ 第一分岐ライン
１２ 第一ブロー電磁弁
１５ 第二分岐ライン
１６ 第二ブロー電磁弁
１９ 第三分岐ライン
２０ 第三ブロー電磁弁
３０ 制御器 1
以下、図面を参照しながら、本発明の実施形態に係るボイラについて説明する。図１は、本実施形態に係るボイラの構成を概略的に示す模式図である。同図に示すように、ボイラ１は、缶体２、送風機３、ダクト４、排気筒５、セパレータ６、濃縮ブローライン１０、制御器３０を備えている。
Hereinafter, a boiler according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram schematically showing the configuration of the boiler according to the present embodiment. As shown in the figure, the boiler 1 includes a can body 2, a blower 3, a duct 4, an exhaust pipe 5, a separator 6, a concentration blow line 10, and a controller 30.
ボイラ１では、送風機３から燃焼用空気が供給され、ダクト４において混合される燃料ガスと燃焼用空気が缶体２内で燃焼して缶体２内の上部ヘッダーと下部ヘッダーとを連結する多数の水管を加熱する。燃焼後の排気ガスは、排気筒５から外部へ排出される。セパレータ６は、蒸気取出ライン７によって上部ヘッダーと接続され、降水管８によって下部ヘッダーと接続されており、主蒸気弁９を開くことでセパレータ６から蒸気が取り出される。
In the boiler 1, combustion air is supplied from the blower 3, and the fuel gas mixed in the duct 4 and the combustion air are burned in the can body 2 to connect the upper header and the lower header in the can body 2. Heat the water tube. The exhaust gas after combustion is discharged from the exhaust cylinder 5 to the outside. The separator 6 is connected to the upper header by the steam extraction line 7 and is connected to the lower header by the downcomer 8, and the steam is taken out from the separator 6 by opening the main steam valve 9.
濃縮ブローライン１０は降水管８に接続されており、濃縮ブロー時には濃縮水が濃縮ブローライン１０を介して外部に排出される。濃縮ブローライン１０は、並列に分岐した第一分岐ライン１１、第二分岐ライン１５、第三分岐ライン１９を備えている。第一分岐ライン１１には、第一ブロー電磁弁１２と、第一オリフィス１３が設置され、第二分岐ライン１５には、第二ブロー電磁弁１６が設置され、第三分岐ライン１９には、第三ブロー電磁弁２０が設置されている。
The concentration blow line 10 is connected to the downcomer 8, and concentrated water is discharged to the outside through the concentration blow line 10 at the time of concentration blow. The concentration blow line 10 includes a first branch line 11, a second branch line 15, and a third branch line 19 that are branched in parallel. In the first branch line 11, a first blow electromagnetic valve 12 and a first orifice 13 are installed, in the second branch line 15, a second blow electromagnetic valve 16 is installed, and in the third branch line 19, A third blow solenoid valve 20 is installed.
ここで、第一～第三分岐ライン１１，１５，１９を構成する配管サイズは10Aであり、第一分岐ライン１１の第一オリフィスはサイズを5Aに絞るように構成されている。また、制御器３０は、主蒸気弁９、第一ブロー電磁弁１２、第二ブロー電磁弁１６及び第三電磁ブロー弁２０と接続されており、これらの弁の開閉を制御する。なお、本実施形態に係るボイラ１のターンダウン比は、１：５である。
Here, the piping size constituting the first to third branch lines 11, 15, and 19 is 10A, and the first orifice of the first branch line 11 is configured to reduce the size to 5A. The controller 30 is connected to the main steam valve 9, the first blow electromagnetic valve 12, the second blow electromagnetic valve 16, and the third electromagnetic blow valve 20, and controls the opening and closing of these valves. In addition, the turndown ratio of the boiler 1 which concerns on this embodiment is 1: 5.
以上、ボイラ１の構成について説明したが、続いて、ボイラ１における濃縮ブローの制御態様について、図２を参照しながら説明する。図２は、本実施形態に係る濃縮ブロー時の各ブロー電磁弁の開閉制御態様を示す図である。ここで、本実施形態に係るボイラ１は、燃焼量を、高燃焼、低燃焼、停止の三位置で制御するものであり、所定周期の１サイクルあたりのブロー電磁弁の開時間を増減することで、予め設定された所望の濃縮ブロー率（給水量に対するブロー水量の比率）となるように濃縮ブロー量を調整するよう構成されている。
The configuration of the boiler 1 has been described above. Subsequently, the control mode of the concentration blow in the boiler 1 will be described with reference to FIG. FIG. 2 is a diagram showing an open / close control mode of each blow solenoid valve during the concentration blow according to the present embodiment. Here, the boiler 1 according to the present embodiment controls the combustion amount at three positions of high combustion, low combustion, and stop, and increases or decreases the opening time of the blow solenoid valve per cycle of a predetermined period. Thus, the concentrated blow amount is adjusted so as to be a preset desired concentrated blow rate (ratio of the blow water amount to the water supply amount).
給蒸量の多い高燃焼時には、制御器３０は、第一～第三ブロー電磁弁１２，１６，２０の全てを開閉制御し、第一～第三分岐ライン１１，１５，１９の全てのラインからブロー水を排出するように制御しており、第一～第三ブロー電磁弁１２，１６，２０の開時間の増減により設定された濃縮ブロー率となるように制御する。
At the time of high combustion with a large amount of steam supply, the controller 30 controls opening and closing of all of the first to third blow solenoid valves 12, 16, 20, and all the lines of the first to third branch lines 11, 15, 19. The blow water is controlled to be discharged from the first and third blow solenoid valves 12, 16 and 20 so that the concentration blow rate is set by increasing or decreasing the open time.
また、給蒸量の少ない低燃焼時には、制御器３０は、第一ブロー電磁弁１２のみを開閉制御し、第二及び第三ブロー電磁弁１６，２０を閉じおくことで、第一分岐ライン１１からのみブロー水を排出するよう制御しており、第一ブロー電磁弁１２の開時間の増減により設定された濃縮ブロー率となるように制御する。
Further, at the time of low combustion with a small amount of steam supply, the controller 30 controls the opening / closing of only the first blow solenoid valve 12 and closes the second and third blow solenoid valves 16, 20, so that the first branch line 11. The blow water is controlled to be discharged only from the exhaust gas, and the concentration blow rate is set by increasing or decreasing the opening time of the first blow solenoid valve 12.
このように、濃縮ブローライン１０に並列に設置された複数のブロー電磁弁１２，１６，２０を、高燃焼と低燃焼とで選択的に開閉制御するようにすれば、濃縮ブロー時に分岐ライン１１，１５，１９を選択的に使用して、濃縮ブローライン１０を流れる濃縮ブロー水の瞬間ブロー量を各燃焼モードに適した流量に調整することができるので、ターンダウン比が大きなボイラであっても各燃焼モードにおいて適切な濃縮ブローを行うことが可能である。なお、本明細書において「選択的に」というときには、全ての選択肢を選択する場合も含むものとする。
As described above, if the plurality of blow solenoid valves 12, 16, and 20 installed in parallel to the concentration blow line 10 are selectively controlled to be opened and closed at high combustion and low combustion, the branch line 11 is supplied at the time of concentration blow. , 15, 19 can be selectively used to adjust the instantaneous blow amount of the concentrated blow water flowing through the concentrate blow line 10 to a flow rate suitable for each combustion mode, so that the boiler has a large turndown ratio. Also, it is possible to perform an appropriate concentration blow in each combustion mode. Note that the term “selectively” in this specification includes a case where all options are selected.
本実施形態では、低燃焼時の瞬間ブロー量と高燃焼時の瞬間ブロー量との比率は、１：６程度になっており、ボイラ１のターンダウン比が１：５と大きくても、各燃焼モードに適切な流量で濃縮ブロー水を排出することができる。
In this embodiment, the ratio of the instantaneous blow amount at the time of low combustion and the instantaneous blow amount at the time of high combustion is about 1: 6, and even if the turndown ratio of the boiler 1 is as large as 1: 5, Concentrated blow water can be discharged at a flow rate suitable for the combustion mode.
続いて、濃縮ブローの制御態様の変形例について、図３を参照しながら説明する。図３は、本変形例に係る濃縮ブロー時の各ブロー電磁弁の開閉制御態様を示す図である。上記実施形態では、燃焼モードに応じて濃縮ブロー時に選択的に使用する分岐ラインを決定しているが、本変形例では、予め設定された濃縮ブロー率に応じて濃縮ブロー時に選択的に使用する分岐ラインを決定する。
Subsequently, a modification of the control mode of the concentration blow will be described with reference to FIG. FIG. 3 is a diagram showing an open / close control mode of each blow solenoid valve during the concentration blow according to this modification. In the above embodiment, the branch line that is selectively used during the concentration blow is determined according to the combustion mode. However, in this modification, the branch line is selectively used during the concentration blow according to a preset concentration blow rate. Determine the branch line.
例えば、濃縮ブロー率が10%以下の場合には、第一分岐ライン１１のみを使用し、濃縮ブロー率が10～15%の場合には、第一分岐ライン１１及び第二分岐ライン１５のみを使用し、濃縮ブロー率が15%以上の場合には、第一～第三分岐ライン１１，１５，１９の全てを使用してブロー水を排出するように制御器３０が制御する。
For example, when the concentration blow rate is 10% or less, only the first branch line 11 is used. When the concentration blow rate is 10 to 15%, only the first branch line 11 and the second branch line 15 are used. If it is used and the concentration blow rate is 15% or more, the controller 30 controls to discharge the blow water using all of the first to third branch lines 11, 15 and 19.
具体的には、濃縮ブロー率が10%以下の場合には、制御器３０は、第二及び第三ブロー電磁弁１６，２０を閉じておき、第一ブロー電磁弁の開時間の増減により所望の濃縮ブロー率となるように制御する。また、濃縮ブロー率が10～15%の場合には、制御器３０は、第三ブロー電磁弁２０を閉じておき、第一及び第二ブロー電磁弁１２，１６の開時間の増減により所望の濃縮ブロー率となるように制御する。また、濃縮ブロー率が15%以上の場合には、制御器３０は、第一～第三ブロー電磁弁１２，１６，２０の開時間の増減により所望の濃縮ブロー率となるように制御する。
Specifically, when the concentration blow rate is 10% or less, the controller 30 keeps the second and third blow solenoid valves 16 and 20 closed, and changes the desired time by increasing or decreasing the open time of the first blow solenoid valve. It controls so that it may become the concentration blow rate of. Further, when the concentration blow rate is 10 to 15%, the controller 30 keeps the third blow solenoid valve 20 closed, and increases or decreases the opening time of the first and second blow solenoid valves 12 and 16 as desired. Control to achieve a concentration blow rate. When the concentration blow rate is 15% or more, the controller 30 controls the first to third blow solenoid valves 12, 16, and 20 to increase or decrease the open time so that the desired concentration blow rate is obtained.
本変形例においては、濃縮ブロー率に応じて濃縮ブロー時に分岐ライン１１，１５，１９を選択的に使用することで、濃縮ブローライン１０の瞬間ブロー量を濃縮ブロー率に応じて適切な流量に調整することができるので、容量の大きなボイラであって、濃縮ブロー率によってブロー水量が大きく変化する場合でもあっても、濃縮ブロー率に応じて適切な濃縮ブローを行うことが可能となる。
In this modification, the branch lines 11, 15, and 19 are selectively used during the concentration blow according to the concentration blow rate, so that the instantaneous blow amount of the concentration blow line 10 is set to an appropriate flow rate according to the concentration blow rate. Since it can be adjusted, even if it is a boiler with a large capacity and the amount of blown water varies greatly depending on the concentration blow rate, it is possible to perform an appropriate concentration blow according to the concentration blow rate.
以上、変形例も含めて本実施形態について詳細に説明したが、本実施形態によれば、複数の分岐ラインを選択的に使用して濃縮ブロー時の流量を調整することができるので、濃縮ブロー量の変動幅の大きいボイラであっても常に適切な量の濃縮ブローを行うことができる。また、濃縮ブロー時の流量を調整できれば、連続的に濃縮ブローを行うような調整も可能となり、濃縮ブロー水と給水との間で効率的な熱交換を行うことができる。
As described above, the present embodiment has been described in detail including modifications, but according to the present embodiment, the flow at the time of the concentration blow can be adjusted by selectively using a plurality of branch lines. Even in a boiler with a large fluctuation range, an appropriate amount of concentration blow can always be performed. Moreover, if the flow rate at the time of the concentration blow can be adjusted, it is possible to adjust the concentration blow continuously, so that efficient heat exchange can be performed between the concentration blow water and the feed water.
なお、本発明の実施形態は上述した形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々の変形が可能である。例えば、本実施形態では、濃縮ブローラインにおいて３つの分岐ラインを並列に設置したが、並列に設置する分岐ラインの数は、複数であれば２つでも４つ以上でも良い。
The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in this embodiment, three branch lines are installed in parallel in the concentration blow line, but the number of branch lines installed in parallel may be two or four or more as long as it is plural.
また、本実施形態では、濃縮ブローラインに設置するブロー弁を電磁ブロー弁としたが、ブロー弁として流量を連続して調整可能なモーターバルブ等の比例制御弁を用いても良い。
In this embodiment, the blow valve installed in the concentration blow line is an electromagnetic blow valve, but a proportional control valve such as a motor valve capable of continuously adjusting the flow rate may be used as the blow valve.
Claims (3)
- 缶体と、前記缶体からブロー水を排出するための濃縮ブローラインと、を備えるボイラにおいて、前記濃縮ブローラインは、それぞれブロー弁を有して並列に設置された複数の分岐ラインを有し、前記複数の分岐ラインを選択的に使用して前記濃縮ブローラインの流量を調整するために、複数の前記ブロー弁を選択的に開閉制御する制御器を備えることを特徴とするボイラ。 In a boiler comprising a can body and a concentrating blow line for discharging blow water from the can body, the concentrating blow line has a plurality of branch lines installed in parallel, each having a blow valve. A boiler comprising a controller for selectively opening and closing the plurality of blow valves in order to selectively use the plurality of branch lines to adjust the flow rate of the concentration blow line.
- 前記制御器は、燃焼ステージに応じて複数の前記ブロー弁うちの何れを開閉制御するかを決定することを特徴とする請求項１記載のボイラ。 2. The boiler according to claim 1, wherein the controller determines which of the plurality of blow valves is controlled to open and close according to a combustion stage.
- 前記制御器は、濃縮ブロー率に応じて複数の前記ブロー弁をうちの何れを開閉制御するかを決定することを特徴とする請求項１記載のボイラ。 The boiler according to claim 1, wherein the controller determines which of the plurality of blow valves is controlled to open and close according to a concentration blow rate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009119305A JP5360560B2 (en) | 2009-05-15 | 2009-05-15 | boiler |
| JP2009-119305 | 2009-05-15 |
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| Publication Number | Publication Date |
|---|---|
| WO2010131302A1 true WO2010131302A1 (en) | 2010-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2009/003982 WO2010131302A1 (en) | 2009-05-15 | 2009-08-20 | Boiler |
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| JP (1) | JP5360560B2 (en) |
| WO (1) | WO2010131302A1 (en) |
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|---|---|---|---|---|
| JP2016095091A (en) * | 2014-11-14 | 2016-05-26 | 株式会社サムソン | Boiler with thermal management device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012132651A (en) * | 2010-12-24 | 2012-07-12 | Miura Co Ltd | Boiler device and method for controlling the same |
| JP5632786B2 (en) * | 2011-03-31 | 2014-11-26 | バブコック日立株式会社 | Waste heat recovery boiler |
| JP5826539B2 (en) * | 2011-07-07 | 2015-12-02 | 株式会社日本サーモエナー | Boiler blow control device and blow control method |
| JP6098339B2 (en) * | 2013-05-01 | 2017-03-22 | 三浦工業株式会社 | Boiler system |
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| JP2002106806A (en) * | 2000-10-03 | 2002-04-10 | Samson Co Ltd | Concentration blowoff equipment having two concentration blowoff ports |
| JP2008002739A (en) * | 2006-06-21 | 2008-01-10 | Miura Co Ltd | Concentration blow control method for boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5937904U (en) * | 1982-09-01 | 1984-03-10 | 栗田工業株式会社 | Boiler blow device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002106806A (en) * | 2000-10-03 | 2002-04-10 | Samson Co Ltd | Concentration blowoff equipment having two concentration blowoff ports |
| JP2008002739A (en) * | 2006-06-21 | 2008-01-10 | Miura Co Ltd | Concentration blow control method for boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016095091A (en) * | 2014-11-14 | 2016-05-26 | 株式会社サムソン | Boiler with thermal management device |
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| JP2010266158A (en) | 2010-11-25 |
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