JPH09243014A - Chemical liquid feeding device for boiler - Google Patents
Chemical liquid feeding device for boilerInfo
- Publication number
- JPH09243014A JPH09243014A JP7953096A JP7953096A JPH09243014A JP H09243014 A JPH09243014 A JP H09243014A JP 7953096 A JP7953096 A JP 7953096A JP 7953096 A JP7953096 A JP 7953096A JP H09243014 A JPH09243014 A JP H09243014A
- Authority
- JP
- Japan
- Prior art keywords
- water supply
- boiler
- pump
- chemical liquid
- chemical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ボイラの給水へ
腐食防止や、スケール付着防止等のために注入する薬液
量を、適正な値に制御するための薬液注入装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical liquid injection device for controlling an appropriate amount of a chemical liquid to be injected into a feedwater of a boiler to prevent corrosion and scale adhesion.
【０００２】[0002]
【従来の技術】一般に、ボイラシステムにおいては、給
水管理のための水処理として、軟水器等によってボイラ
に給水するまでに硬度分を除去する缶外処理と、薬液の
注入によって、スケール付着の原因となるシリカ分や硬
度分を分散や沈殿させたり、缶体腐食の原因となる溶存
酸素等を除去する缶内処理が採用されており、これによ
って高効率運転と耐久性の向上が図られている。これら
のうち缶内処理としては、ボイラシステムの給水装置と
連動して作動する薬液注入装置（以下、薬注装置とい
う。）により、給水量に対して一定の割合で薬液を注入
する方法が採られている。2. Description of the Related Art Generally, in a boiler system, as a water treatment for water supply management, the outside of the can is removed by a water softener or the like to remove hardness until the water is supplied to the boiler. The inside of the can is adopted to disperse and precipitate the silica and hardness that become the main component, and to remove the dissolved oxygen that causes the corrosion of the can, which results in high efficiency operation and improved durability. There is. Among these, as the in-can treatment, a method of injecting the chemical liquid at a constant ratio with respect to the amount of water supplied by a chemical liquid injection device (hereinafter referred to as a chemical injection device) that operates in conjunction with the water supply device of the boiler system is adopted. Has been.
【０００３】この薬注装置は、薬液を収容したタンク
（以下、薬注タンクという。）とボイラの給水ラインと
を、薬注ポンプを挿入してなる薬注ラインで連結して構
成している。そして、給水に対して一定の割合で薬品を
注入するために、薬注ポンプを給水ポンプと連動させて
駆動している。しかし、この薬注装置では、給水に対す
る薬液の注入割合は実用上は必ずしも一定にならない。
つまり、ボイラの缶内圧によって給水流量（吐出量）が
変化するためで、ボイラの缶内圧が高いときには給水流
量が減少し、缶内圧が低いときには給水流量が増加する
ため、給水ポンプと連動して一定量の薬品を注入しても
その濃度が変化し、適正な薬注濃度を維持することは困
難であった。具体的に例を挙げると、ブロー後の新規給
水時等のように、ボイラ缶内の圧力が低い場合には、給
水ポンプによる給水量が増加するため、相対的に薬液の
量が不足することになる。また、ボイラへの要求負荷が
少なく、缶内圧力が大幅に上昇している場合には、給水
ポンプによる給水流量が減少するため、相対的に薬液の
量が過剰になる。This chemical dosing device is constructed by connecting a tank containing a chemical liquid (hereinafter referred to as a chemical dosing tank) and a water supply line of a boiler with a chemical dosing line having a chemical dosing pump inserted therein. . Then, in order to inject the medicine at a constant ratio to the water supply, the chemical injection pump is driven in conjunction with the water supply pump. However, in this chemical injection device, the injection ratio of the chemical liquid to the water supply is not always constant in practice.
In other words, because the feed water flow rate (discharge amount) changes depending on the boiler internal pressure, the feed water flow rate decreases when the boiler internal pressure is high, and increases when the boiler internal pressure is low. Even if a certain amount of drug was injected, its concentration changed, and it was difficult to maintain an appropriate drug concentration. To give a specific example, when the pressure inside the boiler can is low, such as when new water is supplied after blowing, the amount of water supplied by the water supply pump increases, so the amount of chemical liquid is relatively insufficient. become. In addition, when the required load on the boiler is small and the pressure in the can is significantly increased, the flow rate of the water supplied by the water supply pump is reduced, so the amount of the chemical liquid becomes relatively excessive.
【０００４】[0004]
【発明が解決しようとする課題】従って、この発明が解
決しようとする課題は、ボイラの缶内圧によらず、給水
量に対して一定量の薬液を注入することのできる薬液注
入装置を提供することである。SUMMARY OF THE INVENTION Therefore, the problem to be solved by the present invention is to provide a chemical liquid injector capable of injecting a constant amount of chemical liquid with respect to the amount of water supplied, regardless of the boiler internal pressure. That is.
【０００５】[0005]
【課題を解決するための手段】この発明は、ボイラへの
給水ラインに薬注ラインを接続し、給水ライン中に給水
ポンプを接続するとともに、薬注ライン中に、前記給水
ポンプと連動する薬注ポンプを接続し、給水ラインにお
ける給水ポンプの吐出側、或はボイラに設けた圧力検出
手段と、圧力検出手段からの圧力検出値に基づいて、予
め記憶させた給水ポンプの圧力−流量特性を参照して給
水ポンプの流量を求め、この流量に基づいて薬注ポンプ
の吐出量を制御する制御器を備えたボイラ用薬液注入装
置により、上述の課題を解決するものである。According to the present invention, a chemical feed line is connected to a water feed line to a boiler, a water feed pump is connected to the water feed line, and a chemical feed line is connected to the water feed pump. A pressure-flow rate characteristic of the water supply pump that is stored in advance based on the pressure detection means provided by connecting the pump to the discharge side of the water supply pump in the water supply line or the boiler and the pressure detection means. The above-described problem is solved by a chemical injection device for a boiler, which is provided with a controller that obtains the flow rate of the water supply pump with reference and controls the discharge rate of the chemical injection pump based on this flow rate.
【０００６】[0006]
【発明の実施の形態】この発明のボイラ用薬液注入装置
の実施の形態としては、ボイラへの給水ラインに薬注ラ
インを接続し、給水ライン中に給水ポンプを接続すると
ともに、薬注ライン中に、前記給水ポンプと連動する薬
注ポンプを接続し、ボイラ、或は給水ラインにおける給
水ポンプの吐出側に設けた圧力検出手段と、圧力検出手
段からの圧力検出値に基づいて、予め記憶させた給水ポ
ンプの圧力−流量特性を参照して給水ポンプの流量を求
め、この流量に基づいて薬注ポンプの吐出量を制御する
制御器を備えたものとする。BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of a chemical liquid injector for a boiler of the present invention, a chemical injection line is connected to a water supply line to a boiler, a water supply pump is connected to the water supply line, and To the boiler, or pressure detection means provided on the discharge side of the water supply pump in the water supply line, and based on the pressure detection value from the pressure detection means, it is stored in advance. The flow rate of the water supply pump is determined with reference to the pressure-flow rate characteristics of the water supply pump, and a controller for controlling the discharge rate of the chemical injection pump based on this flow rate is provided.
【０００７】前記給水ポンプは、ボイラの制御装置によ
りボイラ内の水位を一定の範囲、或は一定の水位に保つ
ように制御されるものである。前記薬注ラインとは、ボ
イラ内に薬液を供給するための流路であり、薬注ポンプ
とは、薬液を前記薬注ラインを介して給水ライン中に供
給するためのものである。従って、薬液は、給水ポンプ
からの給水とともに、給水ラインからボイラ内に供給さ
れる。また、給水ラインへの薬注ラインの接続箇所は、
給水ポンプの上流側、下流側を問わない。この薬注ポン
プと給水ポンプの連動は、ボイラの制御装置により、給
水ポンプと連動して作動するように構成する場合と、給
水ポンプの作動を検出し、薬注ポンプを作動させるよう
に構成する場合を含む。この給水ポンプの作動の検出
は、給水ポンプへの作動信号や、電力の供給状態を検出
する他、給水ポンプの吐出圧力の変化、給水ライン中の
水の流れの有無を検出することによって行なう。The water supply pump is controlled by a boiler control device so as to keep the water level in the boiler within a certain range or at a certain water level. The chemical injection line is a flow path for supplying the chemical liquid into the boiler, and the chemical injection pump is for supplying the chemical liquid into the water supply line via the chemical injection line. Therefore, the chemical liquid is supplied into the boiler from the water supply line together with the water supply from the water supply pump. In addition, the connection point of the chemical injection line to the water supply line is
It does not matter whether the water supply pump is upstream or downstream. The interlocking of the chemical feed pump and the water feed pump is configured such that the boiler control device operates in conjunction with the water feed pump, and the operation of the water feed pump is detected and the chemical feed pump is operated. Including cases. The operation of the water supply pump is detected by detecting the operation signal to the water supply pump, the power supply state, the discharge pressure change of the water supply pump, and the presence or absence of water flow in the water supply line.
【０００８】前記圧力検出手段は、ボイラの缶体内の圧
力、或は給水ラインにおける給水ポンプの吐出側におい
ての給水の圧力を検出するものである。The pressure detecting means detects the pressure inside the can of the boiler or the pressure of the water supply at the discharge side of the water supply pump in the water supply line.
【０００９】前記制御器は、前記給水ポンプの圧力−流
量特性を参照データとして記憶させてあり、前記圧力検
出手段からの圧力検出値が入力される。制御装置は、こ
の圧力検出値に基づいて前記圧力−流量特性を参照する
ことにより、前記給水ポンプの吐出量を求める。そし
て、この給水ポンプの吐出量に対する薬液の注入量を決
定し、この薬液の注入量に対応するように前記薬注ポン
プを制御する。前記薬液注入装置の制御器は、ボイラの
制御装置の一部として、或は別体に構成されるものを含
む。ここで、給水ポンプの圧力−流量特性とは、給水ポ
ンプの吐出圧（揚程）と吐出流量との関係を示すもので
ある。The controller stores the pressure-flow rate characteristic of the water supply pump as reference data, and receives the pressure detection value from the pressure detection means. The control device obtains the discharge amount of the water supply pump by referring to the pressure-flow rate characteristic based on the detected pressure value. Then, the injection amount of the chemical liquid with respect to the discharge amount of the water supply pump is determined, and the chemical injection pump is controlled so as to correspond to the injection amount of the chemical liquid. The controller of the chemical liquid injector includes one configured as a part of the controller of the boiler or separately. Here, the pressure-flow rate characteristic of the water supply pump indicates the relationship between the discharge pressure (lift) of the water supply pump and the discharge flow rate.
【００１０】ここで、給水ポンプの吐出量に対する薬液
の注入量は、ボイラの使用状況や、薬液の種類によって
決まる給水中の薬液濃度との関係から求める。この時、
薬注ポンプから吐出される薬液が、予め希釈されたもの
の場合には、その希釈率の分多くする。また、薬注ポン
プの吐出量の制御は、薬注ポンプ自体の吐出量を制御す
る場合と、薬注ライン中の流量を流量調整弁等の流量調
整手段を用いて制御する場合を含む。更に、この発明で
は、圧力検出値から、薬注ポンプの吐出量の制御まで
を、以上のような段階を経て行なう他、前記圧力検出値
に対応する薬液ポンプの吐出量の制御を行なうように構
成する場合も含んでいる。Here, the injection amount of the chemical liquid with respect to the discharge amount of the water supply pump is obtained from the relationship between the usage state of the boiler and the concentration of the chemical liquid in the supply water determined by the type of the chemical liquid. This time,
When the chemical liquid discharged from the chemical injection pump is diluted in advance, it is increased by the dilution rate. Further, the control of the discharge amount of the chemical injection pump includes the case of controlling the discharge amount of the chemical injection pump itself and the case of controlling the flow rate in the chemical injection line using a flow rate adjusting means such as a flow rate adjusting valve. Further, according to the present invention, from the pressure detection value to the control of the discharge amount of the chemical injection pump through the steps as described above, the discharge amount of the chemical liquid pump corresponding to the pressure detection value is controlled. It also includes the case of configuring.
【００１１】[0011]
【実施例】以下、この発明の具体的な一実施例につい
て、図面を参照しながら説明する。尚、図１は、この発
明に係るボイラ用薬液注入装置の具体的な一実施例を示
す概略構成図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. 1 is a schematic configuration diagram showing a specific embodiment of the chemical liquid injector for boiler according to the present invention.
【００１２】図１において、ボイラ１には、給水タンク
（図示省略）から延びる給水ライン２を接続してある。
前記給水ライン２中には、給水ポンプ３を接続してあ
り、更に、ボイラ１と給水ポンプ３との間には、逆止弁
４を接続してある。前記給水ポンプ３は、渦流ポンプや
タービンポンプ（特に多段のタービンポンプ）等であっ
て、これらの形式のポンプは吐出圧が高いほど吐出流量
が減少し、吐出圧が低いほど吐出流量が増加する傾向が
ある。薬液タンク５は、薬注ライン６を介して、給水ラ
イン２の逆止弁４の上流側に接続してあり、この薬注ラ
イン６の途中には、吐出量可変式の薬注ポンプ７を接続
してある。この薬液タンク５内には、希釈した薬液、或
は、薬液の原液を収容してある。そして、前記ボイラ１
には、ボイラ１の缶内力を検出する圧力検出手段として
の圧力センサ８を取り付けてある。この圧力センサ８
は、制御器１０に接続してあり、制御器１０は前記圧力
センサ８からの信号に基づき、薬注ポンプ７の吐出量を
制御する。In FIG. 1, a boiler 1 is connected to a water supply line 2 extending from a water supply tank (not shown).
A water supply pump 3 is connected to the water supply line 2, and a check valve 4 is connected between the boiler 1 and the water supply pump 3. The water supply pump 3 is a swirl pump, a turbine pump (particularly a multi-stage turbine pump), etc., and in these types of pumps, the discharge flow rate decreases as the discharge pressure increases, and the discharge flow rate increases as the discharge pressure decreases. Tend. The chemical liquid tank 5 is connected to the upstream side of the check valve 4 of the water supply line 2 via the chemical injection line 6, and in the middle of this chemical injection line 6, a variable discharge type chemical injection pump 7 is provided. It is connected. The chemical solution tank 5 contains a diluted chemical solution or a stock solution of the chemical solution. And the boiler 1
A pressure sensor 8 as pressure detecting means for detecting the internal force of the can of the boiler 1 is attached to the. This pressure sensor 8
Is connected to the controller 10, and the controller 10 controls the discharge amount of the chemical injection pump 7 based on the signal from the pressure sensor 8.
【００１３】ここで、前記制御器１０は、記憶部１０
ａ，演算部１０ｂ，駆動制御部１０ｃとで構成される。
記憶部１０ａは、前記給水ポンプ３の圧力−流量特性を
参照データとして記憶する他、目的とする給水中の薬液
濃度，薬液タンク５内の薬液の希釈率，薬液原液の比
重，薬注ポンプ７の最大吐出量等を参照データとして記
憶する。演算部１０ｂは、前記給水ポンプ３の作動信号
を受けた時点での圧力センサ８からの圧力検出値が入力
され、この圧力検出値に基づいて前記記憶部１０ａの圧
力−流量特性を参照することにより、給水ポンプ３の吐
出量を求める。更に演算部１０ｂは、この給水ポンプ３
の吐出量から、記憶部１０ａの他の参照データ（給水中
の薬液濃度，薬液の希釈率，薬液原液の比重等）を利用
して給水ポンプ３の吐出量に対する薬液の注入量を決定
する。この実施例においては、演算部１０ｂにおいて、
記憶部１０ａの薬注ポンプの最大吐出量の参照データを
利用することにより、薬注ポンプ７を最大吐出量に対し
てどれくらいの比率で駆動するかを演算し、この結果を
駆動制御部１０ｃに出力する。駆動制御部１０ｃは、前
記演算部１０ｂからの制御信号を受けて、前記の薬液の
注入量に対応するように前記薬注ポンプ７の吐出量を制
御する。ここで、前記吐出量可変の薬注ポンプ７が、ダ
イアフラムポンプ等のようなパルス駆動によるものの場
合、駆動制御部１０ｃは、前記演算部１０ｂで求めた吐
出量に対応するパルスを発生させて薬注ポンプ７を駆動
する。また、回転式の薬注ポンプ７の場合、駆動制御部
１０ｃは、前記演算部１０ｂで求めた吐出量に対応する
ように薬注ポンプ７の回転数をインバータ回路や、電圧
調整装置によって制御を行なう。Here, the controller 10 includes a storage unit 10
a, a calculation unit 10b, and a drive control unit 10c.
The storage unit 10a stores the pressure-flow rate characteristic of the water supply pump 3 as reference data, and also serves as a target chemical concentration in the feed water, a dilution rate of the chemical solution in the chemical solution tank 5, a specific gravity of the chemical solution, and a chemical injection pump 7. The maximum discharge amount and the like are stored as reference data. The calculation unit 10b receives the pressure detection value from the pressure sensor 8 at the time of receiving the operation signal of the water supply pump 3, and refers to the pressure-flow rate characteristic of the storage unit 10a based on this pressure detection value. Thus, the discharge amount of the water supply pump 3 is obtained. Further, the calculation unit 10b is configured to operate the water supply pump 3
From the discharge amount of the above, the injection amount of the chemical liquid with respect to the discharge amount of the water supply pump 3 is determined by using other reference data (the concentration of the chemical liquid in the feed water, the dilution rate of the chemical liquid, the specific gravity of the chemical liquid stock solution, etc.) in the storage unit 10a. In this embodiment, in the arithmetic unit 10b,
By using the reference data of the maximum discharge amount of the chemical injection pump of the storage unit 10a, it is calculated how much the chemical injection pump 7 is driven with respect to the maximum discharge amount, and the result is stored in the drive control unit 10c. Output. The drive control unit 10c receives the control signal from the arithmetic unit 10b and controls the discharge amount of the chemical injection pump 7 so as to correspond to the injection amount of the chemical liquid. Here, when the discharge amount variable chemical injection pump 7 is a pulse pump such as a diaphragm pump, the drive control unit 10c generates a pulse corresponding to the discharge amount obtained by the arithmetic unit 10b to generate a drug. The injection pump 7 is driven. Further, in the case of the rotary chemical dosing pump 7, the drive control unit 10c controls the rotation speed of the chemical dosing pump 7 by an inverter circuit or a voltage adjusting device so as to correspond to the discharge amount obtained by the arithmetic unit 10b. To do.
【００１４】尚、前記給水ポンプ３は、ボイラ１の給水
制御装置（図示省略）によって蒸気発生量に応じて低下
する水位を一定のレベルに保つようにＯＮ−ＯＦＦ制御
しており、前記制御器１０は、この給水制御装置から給
水ポンプ３への制御信号を検出して前記薬注ポンプ７を
この給水ポンプ３と連動して作動するよう制御する。
尚、この実施例においては前記圧力センサ８は、ボイラ
１の負荷状況を缶内圧として検出するためにも使用さ
れ、この負荷状況に基づいて燃焼制御器（図示省略）に
よりボイラ１の稼動、停止を制御する。即ち、缶内圧が
予め設定しておいた圧力値以上になれば燃焼を停止し、
缶内圧が設定値以下なれば燃焼を開始するように制御す
る。The water supply pump 3 is ON / OFF controlled by a water supply control device (not shown) of the boiler 1 so as to keep the water level, which decreases according to the amount of steam generated, at a constant level. Reference numeral 10 detects a control signal from the water supply control device to the water supply pump 3 and controls the chemical injection pump 7 to operate in conjunction with the water supply pump 3.
In this embodiment, the pressure sensor 8 is also used to detect the load condition of the boiler 1 as the internal pressure of the can. Based on this load condition, the combustion controller (not shown) starts and stops the boiler 1. To control. That is, if the internal pressure of the can exceeds a preset pressure value, the combustion is stopped,
When the can internal pressure is below the set value, combustion is controlled to start.
【００１５】前記構成のボイラ用薬液注入装置におい
て、全ブロー後の初期給水時には、ボイラ１の缶内にお
ける圧力は定常運転時より低くなっており、圧力センサ
８は缶内の圧力の検出値を制御器１０に出力する。制御
器１０の演算部１０ｂは、圧力センサ８からの圧力検出
値に基づいて、記憶部１０ａの参照データを利用し、こ
の時の給水ポンプ３の吐出量を求め、この給水ポンプ３
の吐出量に対する薬液の注入量を決定する。そして、演
算部１０ｂは、薬注ポンプ７を最大吐出量に対してどれ
くらいの比率で駆動するかを演算し、この結果を駆動制
御部１０ｃに出力する。駆動制御部１０ｃは、前記演算
部１０ｂからの制御信号を受けて、前記の薬液の注入量
に対応するように前記薬注ポンプ７の吐出量を制御す
る。即ち、この場合には、給水ポンプ３の吐出量は、前
述のように定常運転時より増加するため、これに見合っ
た量の薬液が注入される。従って、この発明に係る薬注
装置によれば、全ブロー後の運転時から注入薬液量の不
足による腐食を抑えることが可能となる。逆に、ボイラ
１への負荷が低い場合のように、ボイラ１の缶内におけ
る圧力は定常運転時より高い場合には、給水ポンプ３の
吐出量は、定常運転時より低下するため、定常運転時よ
り少ない量の薬液が注入される。In the chemical liquid injector for a boiler having the above-mentioned structure, the pressure inside the can of the boiler 1 is lower than that during steady operation at the initial water supply after full blow, and the pressure sensor 8 indicates the detected value of the pressure inside the can. Output to the controller 10. The calculation unit 10b of the controller 10 uses the reference data of the storage unit 10a based on the pressure detection value from the pressure sensor 8 to obtain the discharge amount of the water supply pump 3 at this time, and the water supply pump 3
Determines the injection amount of the chemical liquid with respect to the discharge amount of. Then, the calculation unit 10b calculates the ratio at which the chemical injection pump 7 is driven with respect to the maximum discharge amount, and outputs the result to the drive control unit 10c. The drive control unit 10c receives the control signal from the arithmetic unit 10b and controls the discharge amount of the chemical injection pump 7 so as to correspond to the injection amount of the chemical liquid. That is, in this case, since the discharge amount of the water supply pump 3 is larger than that in the steady operation as described above, the amount of the chemical liquid commensurate with this is injected. Therefore, according to the chemical injection device according to the present invention, it is possible to suppress the corrosion due to the insufficient amount of the injected chemical liquid from the time of operation after the full blow. On the contrary, when the pressure in the can of the boiler 1 is higher than that during steady operation, such as when the load on the boiler 1 is low, the discharge amount of the water supply pump 3 is lower than during steady operation, so A lesser amount of drug solution is injected.
【００１６】[0016]
【発明の効果】以上説明したように、この発明に係るボ
イラ用薬液注入装置によれば、ボイラの缶内圧に関係な
く、給水量に対して常に一定の割合で薬品を注入するこ
とができる。従って、薬注濃度を適正な値に維持して、
ボイラ缶内の腐食やスケール付着等を効果的に防止する
ことができる。また、ボイラの運転開始直後から確実な
スケール付着防止効果、及び防食効果を得られ、これに
よって缶体のスケール付着や腐食の機会を大幅に減少さ
せ、ボイラの効率的な運転や長寿命化を達成することが
できる。更に、この発明に係るボイラ用薬液注入装置に
よれば、薬注ポンプの吐出量の設定が不要であるので、
吐出量の調整作業の煩わしさから開放できる。As described above, according to the boiler liquid injector according to the present invention, it is possible to always inject the chemical at a constant ratio with respect to the water supply amount, regardless of the boiler internal pressure. Therefore, maintain the drug concentration at an appropriate value,
It is possible to effectively prevent corrosion and scale adhesion in the boiler can. In addition, it is possible to obtain a reliable scale adhesion prevention effect and a corrosion prevention effect immediately after the boiler operation starts, which greatly reduces the chances of scale adhesion and corrosion of the can body, which enables efficient operation and longer life of the boiler. Can be achieved. Further, according to the chemical liquid injector for a boiler of the present invention, it is not necessary to set the discharge amount of the chemical injection pump,
It can be released from the trouble of adjusting the discharge amount.
【図１】この発明に係るボイラ用薬液注入装置の具体的
な一実施例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing a specific embodiment of a chemical liquid injector for a boiler according to the present invention.
１ ボイラ ２ 給水ライン ３ 給水ポンプ ４ 逆止弁 ６ 薬注ライン ７ 薬注ポンプ ８ 圧力センサ（圧力検出手段） １０ 制御器 1 Boiler 2 Water supply line 3 Water supply pump 4 Check valve 6 Chemical injection line 7 Chemical injection pump 8 Pressure sensor (pressure detection means) 10 Controller
Claims (1)
６を接続し、給水ライン２中に給水ポンプ３を接続する
とともに、薬注ライン６中に、前記給水ポンプ３と連動
する薬注ポンプ７を接続し、ボイラ１、或は給水ライン
２における給水ポンプ３の吐出側に設けた圧力検出手段
８と、圧力検出手段８からの圧力検出値に基づいて、予
め記憶させた給水ポンプ３の圧力−流量特性を参照して
給水ポンプ３の流量を求め、この流量に基づいて薬注ポ
ンプ７の吐出量を制御する制御器１０を備えたことを特
徴とするボイラ用薬液注入装置。1. A chemical injection line 6 is connected to a water supply line 2 to a boiler 1, a water supply pump 3 is connected to the water supply line 2, and a chemical injection line interlocking with the water supply pump 3 is provided in the chemical injection line 6. A pressure detecting means 8 provided on the discharge side of the water supply pump 3 in the boiler 1 or the water supply line 2 to which the pump 7 is connected, and the water supply pump 3 stored in advance based on the pressure detection value from the pressure detecting means 8. 1. The boiler liquid injector for a boiler, comprising a controller 10 for determining the flow rate of the feed water pump 3 with reference to the pressure-flow rate characteristic of 1. and controlling the discharge rate of the chemical injection pump 7 based on this flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7953096A JPH09243014A (en) | 1996-03-06 | 1996-03-06 | Chemical liquid feeding device for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7953096A JPH09243014A (en) | 1996-03-06 | 1996-03-06 | Chemical liquid feeding device for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09243014A true JPH09243014A (en) | 1997-09-16 |
Family
ID=13692553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7953096A Pending JPH09243014A (en) | 1996-03-06 | 1996-03-06 | Chemical liquid feeding device for boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09243014A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010133682A (en) * | 2008-12-08 | 2010-06-17 | Niigata Power Systems Co Ltd | Combustion treatment device for liquid voc (volatile organic compound) |
| WO2015129618A1 (en) * | 2014-02-28 | 2015-09-03 | 栗田工業株式会社 | Method and device for controlling charging of chemical into boiler |
| JP2015161494A (en) * | 2014-02-28 | 2015-09-07 | 栗田工業株式会社 | Control device and control method of chemical injection to boiler |
| JP2015175551A (en) * | 2014-03-14 | 2015-10-05 | 栗田工業株式会社 | Injection method of steam condensate system treatment agent and steam generation plant |
-
1996
- 1996-03-06 JP JP7953096A patent/JPH09243014A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010133682A (en) * | 2008-12-08 | 2010-06-17 | Niigata Power Systems Co Ltd | Combustion treatment device for liquid voc (volatile organic compound) |
| WO2015129618A1 (en) * | 2014-02-28 | 2015-09-03 | 栗田工業株式会社 | Method and device for controlling charging of chemical into boiler |
| JP2015161494A (en) * | 2014-02-28 | 2015-09-07 | 栗田工業株式会社 | Control device and control method of chemical injection to boiler |
| US10179743B2 (en) | 2014-02-28 | 2019-01-15 | Kurita Water Industries Ltd. | Device and method for controlling chemical injection into boiler |
| JP2015175551A (en) * | 2014-03-14 | 2015-10-05 | 栗田工業株式会社 | Injection method of steam condensate system treatment agent and steam generation plant |
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