JPH09173958A - Control method of small quantity of fluid - Google Patents

Control method of small quantity of fluid

Info

Publication number
JPH09173958A
JPH09173958A JP34158795A JP34158795A JPH09173958A JP H09173958 A JPH09173958 A JP H09173958A JP 34158795 A JP34158795 A JP 34158795A JP 34158795 A JP34158795 A JP 34158795A JP H09173958 A JPH09173958 A JP H09173958A
Authority
JP
Japan
Prior art keywords
ammonia water
fluid
air tank
spraying
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP34158795A
Other languages
Japanese (ja)
Inventor
Yoshio Shimizu
芳夫 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP34158795A priority Critical patent/JPH09173958A/en
Publication of JPH09173958A publication Critical patent/JPH09173958A/en
Withdrawn legal-status Critical Current

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Flow Control (AREA)

Abstract

PROBLEM TO BE SOLVED: To eliminate pulsation during transportation and to guarantee stable flow rate control by disposing an air tank in a line between a storage tank for storing a fluid and a spray nozzle for spraying the fluid and spraying a small quantity of the fluid from the spray nozzle. SOLUTION: In an equipment for stably supplying a small quantity of a chemical or the like such as an equipment for removing NOx by spraying an ammonia water in an incineration plant, an ammonia water spray nozzle 7 is connected to the storage tank 1 through a line 6, in which an ammonia water supply pump 2, an air tank 3, a spray flow meter 4 and flow rate controlling valve 5 are interposed. At the time of spraying the ammonia water to a denitration reactor 8 from the nozzle 7, the ammonia water is sprayed from the nozzle 7 not by the operation of the pump 2 but by the air pressure of the air tank 3. As a result, the generation of pulsation in the line 6 is suppressed by keeping the pressure of the air tank 3 constant and the quantity to be sprayed is stably controlled by the flow rate control valve 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は少量の流体の制御
方法に関し、特にゴミ焼却場でアンモニア水を噴霧する
ことによりNOx を除去する設備,あるいは薬液等の小
使用量を安定して供給する設備等に使用される制御方法
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a small amount of fluid, and in particular, equipment for removing NOx by spraying ammonia water in a refuse incineration plant, or equipment for stably supplying a small amount of a chemical solution or the like. Control method used for the above.

【0002】[0002]

【従来の技術】周知の如く、ごみ焼却炉の排ガス中のN
Ox を除去するために排ガス中のNOx 濃度を検出し、
アンモニア水の噴霧量を制御する必要がある。このよう
な場合の例として、排ガス中のNOx 濃度を検出してア
ンモニア水の噴霧量を流量調節弁で制御する場合のフロ
ーを図2に示す。
As is well known, N in exhaust gas from a refuse incinerator is known.
To detect the NOx concentration in the exhaust gas to remove Ox,
It is necessary to control the spray amount of ammonia water. As an example of such a case, FIG. 2 shows a flow when the NOx concentration in the exhaust gas is detected and the spray amount of the ammonia water is controlled by the flow rate control valve.

【0003】図中の21は、アンモニア水貯留タンクであ
る。このタンク21には、アンモニア水噴霧ポンプ22,噴
霧流量計23及び流量調節弁24を介在したライン25を介し
てアンモニア水噴霧ノズル26が連結されている。このノ
ズル26より、前記タンク21に貯留されたアンモニア水が
脱硝反応塔27に噴霧されるようになっている。前記噴霧
ポンプ22の下流のライン25には、エアチャンバー28が取
り付けられている。また、前記流量調節弁24には、NO
x インジケータ兼コントローラ(NOx IC)29が電気
的に接続されている。
Reference numeral 21 in the figure is an ammonia water storage tank. An ammonia water spray nozzle 26 is connected to the tank 21 via a line 25 having an ammonia water spray pump 22, a spray flow meter 23 and a flow rate control valve 24. From this nozzle 26, the ammonia water stored in the tank 21 is sprayed onto the denitration reaction tower 27. An air chamber 28 is attached to a line 25 downstream of the spray pump 22. Further, the flow control valve 24 is set to NO
An x indicator / controller (NOx IC) 29 is electrically connected.

【0004】こうした装置において、前記タンク21に貯
留されたアンモニア水は脱硝反応塔27に噴霧されるが、
アンモニア水噴霧量は排ガス中のNOx 濃度を検出し、
流量調節弁24で制御される。また、アンモニア水噴霧ポ
ンプ22はダイヤフラム(往復動)のためライン25等中に
脈動を発生させるので、これを防止するためにエアチャ
ンバー28を設置している。
In such an apparatus, the ammonia water stored in the tank 21 is sprayed on the denitration reaction tower 27,
The amount of ammonia water spray detected the NOx concentration in the exhaust gas,
It is controlled by the flow control valve 24. Further, the ammonia water spray pump 22 causes a pulsation in the line 25 and the like due to the diaphragm (reciprocating motion), so an air chamber 28 is installed to prevent this.

【0005】[0005]

【発明が解決しようとする課題】ところで、ごみ焼却炉
の排ガス中のNOx を除去するために必要なアンモニア
水は30〜200リットル/h程度であり、またアンモ
ニア水噴霧ノズル26からの噴霧圧は5Kg/cm2 g程
度である。しかしながら、このような小容量ポンプは、
上述した従来技術のようにダイヤフラム等の往復動式が
主流であり、かかるポンプは脈動が大きいため、安定し
た流量を制御することが困難であった。を完全に取れな
い。このため、図2のようにエアチャンバー28を設置す
るなどの手段が採られているが、脈動を十分にとること
ができず、噴霧制御を安定して行うことができない。
The ammonia water required to remove NOx in the exhaust gas of the refuse incinerator is about 30 to 200 liters / hour, and the spray pressure from the ammonia water spray nozzle 26 is It is about 5 Kg / cm 2 g. However, such small capacity pumps
A reciprocating type such as a diaphragm is mainly used as in the above-mentioned conventional technique, and since such a pump has large pulsation, it is difficult to control a stable flow rate. Can not be taken completely. Therefore, as shown in FIG. 2, a means such as installing the air chamber 28 is adopted, but the pulsation cannot be sufficiently taken and the spray control cannot be stably performed.

【0006】近年小容量のギアポンプ,ロータリーポン
プ等の回転式ポンプも製作されるようになってきている
が、アンモニア水ポンプ等に使用されている実績も少な
い。また、回転式ポンプを使用しても、ポンプを使用す
る限り、脈動は完全には無くせない。
In recent years, rotary pumps such as small-capacity gear pumps and rotary pumps have been manufactured, but they are rarely used in ammonia water pumps. Even if a rotary pump is used, pulsation cannot be completely eliminated as long as the pump is used.

【0007】この発明はこうした事情を考慮してなされ
たもので、貯留タンクと噴霧ノズル間のラインに空気タ
ンクを設けることにより、移送中の脈動をなくし、安定
した流量制御をなしえる少量の流体の制御方法を提供す
ることを目的とする。
The present invention has been made in consideration of such circumstances, and by providing an air tank in the line between the storage tank and the spray nozzle, a pulsation during transfer can be eliminated and a small amount of fluid that can achieve stable flow rate control. It aims at providing the control method of.

【0008】[0008]

【課題を解決するための手段】この発明は、流体を貯留
する貯留タンクとこの貯留タンクからの流体を噴霧する
噴霧ノズル間のラインに空気タンクを設け、前記噴霧ノ
ズルから少量の流体を噴霧することを特徴とする少量の
流体の制御方法である。
According to the present invention, an air tank is provided in a line between a storage tank for storing a fluid and a spray nozzle for spraying the fluid from the storage tank, and a small amount of fluid is sprayed from the spray nozzle. This is a method for controlling a small amount of fluid.

【0009】つまり、この発明では従来のポンプに代わ
って空気タンクを用いることにより、空気の圧力で流体
を移送して移送中の脈動をなくし、安定した流量制御を
行うものである。
That is, in the present invention, an air tank is used in place of the conventional pump to transfer the fluid at the pressure of air to eliminate the pulsation during the transfer and to perform stable flow rate control.

【0010】[0010]

【発明の実施の形態】以下、この発明の一実施例を図1
を参照して説明する。図中の符番1は、アンモニア水貯
留タンクである。この貯留タンク1には、アンモニア水
供給ポンプ2,空気タンク3,噴霧流量計4及び流量調
節弁5を介在したライン6を介してアンモニア水噴霧ノ
ズル7が連結されている。このノズル7より、前記タン
ク1に貯留されたアンモニア水が脱硝反応塔8に噴霧さ
れるようになっている。前記空気タンク3には調節弁
9,圧力コントローラ10が接続され、これにより空気タ
ンク3の圧力は空気を供給することで一定に保たれるよ
うになっている。前記アンモニア水供給ポンプ2,噴霧
流量計4にはフローコントローラ11が接続されている。
前記流量調節弁5には、NOx インジケータ兼コントロ
ーラ(NOx IC)12が接続されている。
BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG. Reference numeral 1 in the figure is an ammonia water storage tank. An ammonia water spray nozzle 7 is connected to the storage tank 1 through a line 6 having an ammonia water supply pump 2, an air tank 3, a spray flow meter 4 and a flow rate adjusting valve 5 interposed therebetween. Ammonia water stored in the tank 1 is sprayed from the nozzle 7 to the denitration reaction tower 8. A control valve 9 and a pressure controller 10 are connected to the air tank 3 so that the pressure of the air tank 3 can be kept constant by supplying air. A flow controller 11 is connected to the ammonia water supply pump 2 and the spray flow meter 4.
A NOx indicator / controller (NOx IC) 12 is connected to the flow rate control valve 5.

【0011】こうした装置では、ポンプで直接ノズルか
ら噴霧するのではなく、空気タンク3の空気圧によって
アンモニア水を噴霧する。この空気タンク3の圧力を一
定に保てばライン中に脈動は発生しないので、流量調節
弁5によって安定して噴霧量が制御できる。空気タンク
3の圧力は、調節弁9により空気を供給することで一定
に保たれるようになっている。また、空気タンク3には
アンモニア水貯留タンク1によりアンモニア水供給ポン
プ2でアンモニア水が供給され、空気タンク3の液面は
噴霧流量計4で噴霧量を検出することによりアンモニア
供給ポンプ2の吐出量を制御して一定に保たれる。アン
モニア水供給ポンプ2の吐出量はNOxIC12からの制
御も可能である。
In such an apparatus, the ammonia water is sprayed by the air pressure of the air tank 3 instead of directly spraying from the nozzle by the pump. If the pressure of the air tank 3 is kept constant, pulsation does not occur in the line, so that the flow rate control valve 5 can stably control the spray amount. The pressure of the air tank 3 is kept constant by supplying air from the control valve 9. Ammonia water is supplied from the ammonia water storage tank 1 to the air tank 3 by the ammonia water supply pump 2, and the liquid level of the air tank 3 is discharged by the spray flow meter 4 by detecting the amount of spray. The amount is controlled and kept constant. The discharge amount of the ammonia water supply pump 2 can be controlled by the NOx IC12.

【0012】しかして、上記実施例によれば、ライン6
に設けた空気タンク3により、空気圧によってアンモニ
ア水噴霧ノズル7からアンモニア水を噴霧するため、空
気タンク3の圧力,液面を一定に保てばライン6中に脈
動は発生しないので、流量調節弁5によって安定してア
ンモニア水の噴霧量が制御できる。なお、空気タンク3
は容量が大きい程空気圧は安定するが、圧力が1Kg/
cm2 gを越え、容量が40リットルを越えると圧力容
器となるため、40リットル未満にしてもアンモニア水
噴霧量が少ないため問題ない。なお、上記実施例では、
流体としてアンモニア水を用いた場合について述べた
が、これに限らず、多の流体の制御にも適用可能であ
る。
According to the above embodiment, however, the line 6
Since the ammonia water is sprayed from the ammonia water spray nozzle 7 by the air tank 3 provided in the air tank 3, pulsation does not occur in the line 6 if the pressure and the liquid level of the air tank 3 are kept constant. 5, the amount of sprayed ammonia water can be controlled stably. The air tank 3
The larger the capacity, the more stable the air pressure, but the pressure is 1 kg /
If it exceeds cm 2 g and the volume exceeds 40 liters, it becomes a pressure vessel, and even if it is less than 40 liters, there is no problem because the amount of sprayed ammonia water is small. In the above embodiment,
Although the case where the ammonia water is used as the fluid has been described, the present invention is not limited to this and can be applied to control of many fluids.

【0013】[0013]

【発明の効果】以上詳述したようにこの発明によれば、
貯留タンクと噴霧ノズル間のラインに空気タンクを設け
ることにより、移送中の脈動をなくし、安定した流量制
御をなしえる少量の流体の制御方法を提供できる。
As described in detail above, according to the present invention,
By providing the air tank in the line between the storage tank and the spray nozzle, it is possible to provide a method for controlling a small amount of fluid that can eliminate pulsation during transfer and achieve stable flow rate control.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の一実施例に係る少量の流体の制御方
法のフローを示す図。
FIG. 1 is a diagram showing a flow of a method for controlling a small amount of fluid according to an embodiment of the present invention.

【図2】従来の少量の流体の制御方法のフローを示す
図。
FIG. 2 is a diagram showing a flow of a conventional method for controlling a small amount of fluid.

【符号の説明】[Explanation of symbols]

1…アンモニア水貯留タンク、 2…アンモニア水供給ポンプ、 3…空気タンク、 4…噴霧流量計、 5…流量調節弁、 6…ライン、 7…アンモニア水噴霧ノズル、 8…脱硝反応塔、 9…調節弁、 10…圧力コントローラ、 11…フローコントローラ、 12…NOx IC。 DESCRIPTION OF SYMBOLS 1 ... Ammonia water storage tank, 2 ... Ammonia water supply pump, 3 ... Air tank, 4 ... Spray flow meter, 5 ... Flow control valve, 6 ... Line, 7 ... Ammonia water spray nozzle, 8 ... Denitration reaction tower, 9 ... Control valve, 10 ... Pressure controller, 11 ... Flow controller, 12 ... NOx IC.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 流体を貯留する貯留タンクとこの貯留タ
ンクからの流体を噴霧する噴霧ノズル間のラインに空気
タンクを設け、前記噴霧ノズルから少量の流体を噴霧す
ることを特徴とする少量の流体の制御方法。
1. A small amount of fluid characterized in that an air tank is provided in a line between a storage tank for storing a fluid and a spray nozzle for spraying the fluid from the storage tank, and a small amount of fluid is sprayed from the spray nozzle. Control method.
JP34158795A 1995-12-27 1995-12-27 Control method of small quantity of fluid Withdrawn JPH09173958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34158795A JPH09173958A (en) 1995-12-27 1995-12-27 Control method of small quantity of fluid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34158795A JPH09173958A (en) 1995-12-27 1995-12-27 Control method of small quantity of fluid

Publications (1)

Publication Number Publication Date
JPH09173958A true JPH09173958A (en) 1997-07-08

Family

ID=18347238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34158795A Withdrawn JPH09173958A (en) 1995-12-27 1995-12-27 Control method of small quantity of fluid

Country Status (1)

Country Link
JP (1) JPH09173958A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106989914A (en) * 2017-05-28 2017-07-28 西安成立航空制造有限公司 A kind of fuel nozzle air pulling liquid type multi-function test stand and its test method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106989914A (en) * 2017-05-28 2017-07-28 西安成立航空制造有限公司 A kind of fuel nozzle air pulling liquid type multi-function test stand and its test method

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20030304