JPH11221433A - Method and apparatus for evaluating dissolution rate of powder desulfurization agent - Google Patents
Method and apparatus for evaluating dissolution rate of powder desulfurization agentInfo
- Publication number
- JPH11221433A JPH11221433A JP10024776A JP2477698A JPH11221433A JP H11221433 A JPH11221433 A JP H11221433A JP 10024776 A JP10024776 A JP 10024776A JP 2477698 A JP2477698 A JP 2477698A JP H11221433 A JPH11221433 A JP H11221433A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- dissolution rate
- powdery
- neutralization titration
- titration reagent
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉状脱硫薬剤の溶
解速度評価方法及びその装置に関する。さらに詳しく
は、排煙脱硫装置に適用する粉状脱硫薬剤の溶解速度
（活性度）評価方法及びその装置に関する。The present invention relates to a method and an apparatus for evaluating the dissolution rate of a powdery desulfurizing agent. More specifically, the present invention relates to a method for evaluating the dissolution rate (activity) of a powdery desulfurization agent applied to a flue gas desulfurization apparatus and an apparatus therefor.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】粉状ア
ルカリ性薬剤を脱硫剤として適用する湿式排煙脱硫装置
の性能は、粉状アルカリ性薬剤の溶剤の溶解速度（活性
度）に大きく影響される。しかしながら、従来、この溶
解速度（活性度）データは、薬剤納入メーカーの指示値
である独自の時間，％表示をそのまま信用するか、ある
いは、薬剤純度及び粒径分布測定結果より経験的に推定
していた。このような溶解速度データを利用して排煙脱
硫装置に適用すると、しばしば装置トラブルの原因とな
り、安定的かつ信頼性の高い装置の運転が困難になる問
題が生じていた。また、脱硫剤を長期間保存したような
ときには、該脱硫剤表面に膜等ができる場合がある。こ
のような状態になった薬剤は、一般に溶け難いため、実
機に用いるとトラブルの原因となり、運転が困難になる
問題が生じていた。2. Description of the Related Art The performance of a wet flue gas desulfurization apparatus employing a powdery alkaline chemical as a desulfurizing agent is greatly affected by the dissolution rate (activity) of the solvent of the powdery alkaline chemical. . However, in the past, this dissolution rate (activity) data has to be used as it is, based on the original time and% indications specified by the drug supplier, or empirically estimated from the results of drug purity and particle size distribution measurements. I was Applying such melting rate data to flue gas desulfurization equipment often causes equipment troubles, causing a problem in that stable and reliable equipment operation becomes difficult. When the desulfurizing agent is stored for a long period of time, a film or the like may be formed on the surface of the desulfurizing agent. The drug in such a state is generally difficult to dissolve, so that when used in an actual machine, it causes a trouble, and there has been a problem that driving becomes difficult.
【０００３】本発明者らは、上記問題点に鑑み、湿式排
煙脱硫装置の安定運転性及び信頼性の向上が図れるとと
もに、トラブル対応に必要とされるコスト低減が可能と
なるような粉状脱硫薬剤の溶解速度評価方法を開発すべ
く鋭意検討した。その結果、本発明者らは、粉状脱硫薬
剤を使用する際には、該脱粒剤の溶解速度を的確かつ迅
速に知ることが必要であるとの観点から、粉状脱硫薬剤
を含む溶液を反応容器に入れ、該溶液の温度を維持しな
がらｐＨを所定値になるまで中和滴定試薬を徐々に注入
し、該注入量から溶解速度を評価することにより、かか
る問題点が解決されることを見い出した。本発明は、か
かる見地より完成されたものである。[0003] In view of the above problems, the present inventors have attempted to improve the stable operation and reliability of a wet flue gas desulfurization apparatus and to reduce the cost required for troubleshooting. We worked diligently to develop a method for evaluating the dissolution rate of desulfurizing agents. As a result, the present inventors, when using the powdery desulfurization agent, from the viewpoint that it is necessary to know the dissolution rate of the deagglomeration agent accurately and quickly, the solution containing the powdery desulfurization agent Such a problem can be solved by gradually injecting the neutralization titration reagent into a reaction vessel until the pH reaches a predetermined value while maintaining the temperature of the solution, and evaluating the dissolution rate from the injected amount. I found The present invention has been completed from such a viewpoint.
【０００４】[0004]
【課題を解決するための手段】すなわち、本発明は、粉
状脱硫薬剤を溶媒に混合した溶液を反応容器に入れ、該
溶液の温度を一定に維持しながら該溶液のｐＨを所定値
になるまで中和滴定試薬を注入し、該注入量から溶解速
度を評価することを特徴とする粉状脱硫薬剤の溶解速度
評価方法を提供するものである。ここで、上記中和滴定
試薬としては、２Ｎ−Ｈ2 ＳＯ4 が特に好ましい。ま
た、上記粉状脱硫薬剤としては、ＭｇＯが特に好まし
い。また、本発明は、溶媒を注入する溶媒注入手段と、
粉状脱硫薬剤を供給する粉状脱硫供給手段と、該粉状脱
硫薬剤を該溶媒に混合した溶液を均一に攪拌する攪拌手
段及び該溶液を一定温度まで加熱する加熱手段を備えた
反応容器と、上記溶液のｐＨを検出するｐＨ検出手段
と、上記溶液に中和滴定試薬を供給する中和滴定試薬供
給手段と、該中和滴定試薬供給手段から供給される中和
滴定試薬の供給量を記録する中和滴定試薬供給記録手段
とからなり、記録された中和滴定試薬供給量から上記粉
状脱硫薬剤の上記溶媒に対する溶解度を評価することを
特徴とする粉状脱硫薬剤の溶解速度評価装置を提供する
ものである。That is, according to the present invention, a solution obtained by mixing a powdery desulfurization agent with a solvent is placed in a reaction vessel, and the pH of the solution is adjusted to a predetermined value while maintaining the temperature of the solution constant. It is intended to provide a method for evaluating the dissolution rate of a powdery desulfurizing agent, which comprises injecting a neutralization titration reagent until the dissolution rate and evaluating the dissolution rate from the injected amount. Here, 2N—H 2 SO 4 is particularly preferable as the neutralization titration reagent. As the powdery desulfurizing agent, MgO is particularly preferable. Further, the present invention, a solvent injection means for injecting a solvent,
A powdered desulfurization supply unit for supplying a powdery desulfurization agent, a reaction vessel including a stirring unit for uniformly stirring a solution obtained by mixing the powdery desulfurization agent with the solvent, and a heating unit for heating the solution to a certain temperature; A pH detection unit for detecting the pH of the solution, a neutralization titration reagent supply unit for supplying a neutralization titration reagent to the solution, and a supply amount of the neutralization titration reagent supplied from the neutralization titration reagent supply unit. A dissolving rate evaluation device for a powdery desulfurization agent, comprising: a neutralization titration reagent supply recording means for recording; and evaluating the solubility of the powdery desulfurization agent in the solvent from the recorded neutralization titration reagent supply amount. Is provided.
【０００５】本発明の粉状脱硫薬剤の溶解速度評価方法
及びその装置によれば、湿式排煙脱硫装置の性能やトラ
ブル発生に大きく影響する粉状脱硫薬剤の溶解速度を総
合的に、かつ迅速に評価できる。そして、溶解速度が非
常に遅い粗悪薬剤の実機適用を未然に防止することがで
きるため、粉状脱硫薬剤の溶解速度に起因するトラブル
を軽減あるいは防止することができる。以下、本発明に
ついて、詳細に説明する。[0005] According to the method and apparatus for evaluating the dissolution rate of a powdery desulfurization agent of the present invention, the dissolution rate of the powdery desulfurization agent, which greatly affects the performance and trouble occurrence of a wet flue gas desulfurization apparatus, can be comprehensively and rapidly increased. Can be evaluated. In addition, since it is possible to prevent the application of a poor drug having a very low dissolution rate to an actual machine, it is possible to reduce or prevent troubles caused by the dissolution rate of the powdery desulfurization drug. Hereinafter, the present invention will be described in detail.
【０００６】[0006]
【発明の実施の形態】本発明の粉状脱硫薬剤の溶解速度
評価方法においては、粉状脱硫薬剤を溶媒に混合した溶
液を反応容器に入れ、該溶液の温度を一定に維持しなが
ら該溶液のｐＨを所定値になるまで中和滴定試薬を徐々
に注入し、該注入量から溶解速度を評価する。また、本
発明の粉状脱硫薬剤の溶解速度評価装置は、溶媒注入
手段、粉状脱硫供給手段、攪拌手段及び加熱手段を
備えた反応容器、ｐＨ検出手段、中和滴定試薬供給
手段、中和滴定試薬供給記録手段からなり、記録され
た中和滴定試薬供給量から粉状脱硫薬剤の溶媒に対する
溶解度（溶解速度）を評価するものである。BEST MODE FOR CARRYING OUT THE INVENTION In the method for evaluating the dissolution rate of a powdery desulfurizing agent according to the present invention, a solution obtained by mixing a powdery desulfurizing agent with a solvent is placed in a reaction vessel, and the solution is maintained at a constant temperature. The neutralization titration reagent is gradually injected until the pH reaches a predetermined value, and the dissolution rate is evaluated based on the injected amount. Further, the apparatus for evaluating the dissolution rate of a powdery desulfurizing agent of the present invention comprises a reaction vessel equipped with a solvent injection means, a powdery desulfurization supply means, a stirring means and a heating means, a pH detection means, a neutralization titration reagent supply means, a neutralization The titration reagent supply recording means evaluates the solubility (dissolution rate) of the powdery desulfurization agent in the solvent from the recorded neutralization titration reagent supply amount.
【０００７】実施の形態 湿式脱硫のメカニズムは、気相中の亜硫酸ガスが液相溶
解し、さらに、液相中に溶解しているアルカリ性の脱硫
薬剤と反応する。反応式で具体例を挙げれば、例えば以
下のような反応である。 ＳＯ2 ＋ Ｈ2 Ｏ → ＨＳＯ3 - ＋ Ｈ+ ‥‥‥‥（溶解1) Ｍｇ（ＯＨ)2＋ＨＳＯ3 - ＋Ｈ+ → ＭｇＳＯ3 ＋２Ｈ2 Ｏ ‥‥（反応1) ここで、上記反応１式左辺のＭｇ（ＯＨ）2 の溶解状態
は、Ｍｇ2+と２ＯＨ-とにほぼ解離しており、右辺のＭ
ｇＳＯ3 の溶解状態は、Ｍｇ2+とＳＯ3 2- とにほぼ解離
している。すなわち、脱硫薬剤は液相に溶解して、その
役割を発揮するものであり、溶解速度（活性度）が大き
い脱硫薬剤の適用により、湿式排煙脱硫装置の高効率維
持の運転が容易になる。この溶解速度に関わる因子は、
薬剤の純度，粒子径，表面状態（表面粗さや表面積，難
溶性物質被膜の有無又はその厚さ）等に複雑に関係して
おり、その評価はこれらの因子を総合的に解析しなけれ
ばならない。[0007] mechanism in the form wet desulfurization embodiment, the sulfur dioxide in the gas phase dissolves the liquid phase, further, reacts with the alkaline desulfurizing agent which is dissolved in the liquid phase. Specific examples of the reaction formula include the following reactions. SO 2 + H 2 O → HSO 3 - + H + ‥‥‥‥ ( dissolved 1) Mg (OH) 2 + HSO 3 - + H + → MgSO 3 + 2H 2 O ‥‥ ( Reaction 1), where the reaction equation (1) The dissolved state of Mg (OH) 2 on the left side is almost dissociated into Mg 2+ and 2OH − and M
The dissolved state of gSO 3 is almost dissociated into Mg 2+ and SO 3 2- . In other words, the desulfurizing agent dissolves in the liquid phase and exerts its role. The application of the desulfurizing agent having a high dissolution rate (activity) facilitates the operation for maintaining the high efficiency of the wet flue gas desulfurization device. . The factors involved in this dissolution rate are:
It is complicatedly related to the purity, particle size, surface condition (surface roughness, surface area, presence or absence of a hardly soluble substance coating or its thickness) of the drug, and the evaluation must comprehensively analyze these factors. .
【０００８】そこで、本発明では、粉状脱硫薬剤を含む
溶液の温度を一定に維持しながら、該溶液のｐＨを所定
値になるまで中和滴定試薬を注入し、該注入量から溶解
速度を評価する。これによって、薬剤の純度，粒子径，
表面状態等が複雑に関係する溶解速度について、これら
の因子を総合的に勘案した評価をすることができるので
ある。なお、後述の実施例に示すように本発明の評価
は、非連続的にサンプリングして行うものである。Therefore, in the present invention, while maintaining the temperature of the solution containing the powdery desulfurization agent constant, a neutralization titration reagent is injected until the pH of the solution reaches a predetermined value, and the dissolution rate is determined from the injection amount. evaluate. This allows the purity, particle size,
The dissolution rate in which the surface state and the like are complicatedly related can be evaluated in consideration of these factors comprehensively. The evaluation of the present invention is performed by sampling non-continuously, as shown in Examples described later.
【０００９】本発明に用いられる粉状脱硫薬剤は、特に
限定されることなく、一般に広く脱硫剤として使用され
ているものを挙げることができる。具体的には、例え
ば、Ｍｇ系ではＭｇＯ，Ｍｇ（ＯＨ）2 等が挙げられ、
Ｃａ系ではＣａＯ等が挙げられる。Ｍｇ系は、取扱い面
で優れるという特徴を有しており、特にＭｇＯは粉状脱
硫薬剤として好ましい。一方、ＣａＯ等は、反応により
発熱するため溶解度の点ではＭｇ系より優れるという特
徴がある。また、本発明に用いられる中和滴定試薬とし
ては、特に限定されることなく通常滴定試薬として用い
られているものを使用できるが、特に２Ｎ−Ｈ2 ＳＯ4
が好ましい。なお、脱硫薬剤の評価は、上記中和滴定試
薬の積算適定量が所定時間経過後に、理論滴定終了点に
対してどの程度の割合（百分率）であるかによって行わ
れる。この評価では、一般に、一定の値以上を良好、一
定の値未満を粗悪、その中間を要注意等のように分類さ
れるものであるが、該分類は使用装置，使用環境，使用
薬剤等によって、その都度調整されるべきものである。[0009] The powdery desulfurizing agent used in the present invention is not particularly limited, and examples thereof include those generally and widely used as desulfurizing agents. Specifically, for example, Mg-based materials include MgO, Mg (OH) 2, and the like.
In the Ca system, CaO and the like can be mentioned. Mg-based materials have the feature of being excellent in handling, and MgO is particularly preferred as a powdery desulfurizing agent. On the other hand, CaO and the like have a feature that they are superior to Mg-based in terms of solubility because they generate heat by the reaction. The neutralization titration reagent used in the present invention is not particularly limited, and those usually used as a titration reagent can be used. In particular, 2N-H 2 SO 4
Is preferred. The evaluation of the desulfurizing agent is made based on the ratio (percentage) of the above-mentioned neutralization titration reagent to the theoretical titration end point after the lapse of a predetermined time. In this evaluation, in general, a certain value or more is classified as good, a value less than a certain value is poor, and the middle is classified as requiring caution, etc. Should be adjusted each time.
【００１０】本発明においては、温度を一定に維持し、
溶液に中和滴定試薬を注入する際に、Ｎ2 ガスを所定流
量で反応容器内に導入することが好ましい。上記反応１
式によって生成するＭｇＳＯ3 は、反応溶液中の酸素
（Ｏ2 ）と反応してＭｇＳＯ4となる場合があり、この
場合には溶解度が大きく異なってしまう。したがって、
酸素の影響を少なくして、溶解度の変動を防ぐために
は、Ｎ2 ガスを導入することが効果的である。In the present invention, the temperature is kept constant,
When injecting the neutralization titration reagent into the solution, it is preferable to introduce N 2 gas into the reaction vessel at a predetermined flow rate. Reaction 1 above
MgSO 3 generated by the formula may react with oxygen (O 2 ) in the reaction solution to form MgSO 4 , and in this case, the solubility is greatly different. Therefore,
In order to reduce the influence of oxygen and prevent a change in solubility, it is effective to introduce N 2 gas.
【００１１】また、本発明では、粉状脱硫薬剤を含む溶
液の所定の温度に維持しながら、該溶液のｐＨを所定値
になるように設定する。これらの温度及びｐＨ値につい
ては、特定の範囲に限定されるものではないが、脱硫薬
剤の種類，使用状況等に合わせて適宜選択する必要があ
る。Further, in the present invention, the pH of the solution containing the powdery desulfurization agent is set to a predetermined value while maintaining the solution at a predetermined temperature. These temperatures and pH values are not limited to specific ranges, but need to be appropriately selected according to the type of desulfurizing agent, usage conditions, and the like.
【００１２】一方、本発明の溶解速度評価装置は、上記
粉状脱硫薬剤の溶解速度評価を行う場合に、最も適した
装置の１つを提供するものである。本評価装置では、上
記粉状脱硫薬剤を含む溶液に中和滴定試薬を注入する際
に、粉状脱硫薬剤を溶媒に混合して溶液を均一に攪拌す
る攪拌手段と、この溶液を一定温度まで加熱する加熱手
段とを備えた反応容器を用いる。攪拌手段としては、反
応容器内に、プロペラ状の翼を有する回転装置などを用
いることができる。加熱手段としては、例えばホットプ
レート等を用いることができる。これらによって、溶液
の温度を一定に維持しながら、該溶液を所定のｐＨ値に
なるまで均一な状態に維持することができる。On the other hand, the dissolution rate evaluation apparatus of the present invention provides one of the most suitable apparatuses for evaluating the dissolution rate of the above-mentioned powdery desulfurization agent. In this evaluation device, when injecting the neutralization titration reagent into the solution containing the powdery desulfurization agent, a stirring means for mixing the powdery desulfurization agent with the solvent and uniformly stirring the solution, and bringing the solution up to a certain temperature. A reaction vessel provided with a heating means for heating is used. As the stirring means, a rotating device having a propeller-like blade in a reaction vessel can be used. As the heating means, for example, a hot plate or the like can be used. Thus, while maintaining the temperature of the solution constant, the solution can be maintained in a uniform state until it reaches a predetermined pH value.
【００１３】本評価装置では、上記反応容器に溶媒を注
入する溶媒注入手段と、粉状脱硫薬剤を供給する粉状脱
硫薬剤供給手段とを有しており、溶媒及び供試薬剤が供
給される。また、反応容器内の中和滴定試薬供給手段に
よって、上記中和滴定試薬が供給される。反応容器内で
の反応によるｐＨの変化は、溶液のｐＨを検出するｐＨ
検出手段により測定される。そして、中和滴定試薬の供
給量は、中和滴定試薬供給記録手段により記録され、こ
の記録された中和滴定試薬供給量から上記粉状脱硫薬剤
の上記溶媒に対する溶解度が評価できる。このような本
発明の溶解速度評価装置によれば、粉状脱硫薬剤の溶解
速度評価を迅速かつ的確に行うことができる。This evaluation apparatus has a solvent injecting means for injecting a solvent into the reaction vessel and a powdery desulfurizing agent supply means for supplying a powdery desulfurizing agent, and the solvent and the reagent agent are supplied. . Further, the neutralization titration reagent is supplied by the neutralization titration reagent supply means in the reaction vessel. The change in pH due to the reaction in the reaction vessel is determined by detecting the pH of the solution.
It is measured by the detecting means. The supply amount of the neutralization titration reagent is recorded by the neutralization titration reagent supply recording means, and the solubility of the powdery desulfurization agent in the solvent can be evaluated from the recorded neutralization titration reagent supply amount. According to such a dissolution rate evaluation device of the present invention, the dissolution rate of the powdery desulfurization agent can be evaluated quickly and accurately.
【００１４】本発明に係る粉状脱硫薬剤の溶解速度評価
方法及びその装置は、上記実施の形態に限らず、本発明
の技術的思想の範囲において、種々変形が可能である。
以下、実施例により本発明をより詳細に説明するが、本
発明はこれらの実施例によって何ら制限されるものでは
ない。The method and apparatus for evaluating the dissolution rate of a powdery desulfurizing agent according to the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the technical idea of the present invention.
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【００１５】[0015]
【実施例】実施例１ 図１に示す溶解速度評価装置を用いて、以下の試験を行
った。反応容器１（ガラス製保温２重構造）の容量を５
００ｍｌとし、供試薬剤はＭｇＯ粉末について、試験条
件を下記とした。反応容器１内の液温度を５０℃、反応
容器１内の液ｐＨを６．０、反応容器１内の初期液量を
２００ｍｌ、攪拌機３の軸回転速度を１８０ｒｐｍ、Ｎ
2 ガス１２パージ流量１０，１１を７０ｍｌ／分、供試
薬剤１３投入量を１８ｍｍｏｌ、中和滴定試薬６を２Ｎ
−Ｈ2 ＳＯ4 とした。Example 1 The following test was conducted using the dissolution rate evaluation apparatus shown in FIG. The capacity of the reaction vessel 1 (double glass insulation structure) is 5
The test conditions were as follows with MgO powder as the reagent agent. The temperature of the liquid in the reaction vessel 1 was 50 ° C., the pH of the liquid in the reaction vessel 1 was 6.0, the initial liquid volume in the reaction vessel 1 was 200 ml, the shaft rotation speed of the stirrer 3 was 180 rpm, and N
2 gas 12 purge flow rates 10 and 11 at 70 ml / min, reagent supply 13 charge 18 mmol, neutralization titration reagent 6 2N
—H 2 SO 4 .
【００１６】試験は、以下の手順にしたがって行った。
先ず、反応容器１に、純水を所定量（２００ｍｌ）注入
し、攪拌機３で容器１内液が均一となるように、一定速
度（１８０ｒｐｍ）で攪拌した。次いで、Ｎ2 ガス１２
を、流量調節弁１１及び流量計１０を介して、所定流量
（７０ｍｌ／分）で反応容器１内水に導入（溶存酸素パ
ージ）しながら、ホットプレート２及び温度計８，温度
調節器９にて、反応容器１内水を所定温度（５０℃）に
昇温保持した。さらに、反応容器１内に、所定量（１８
ｍｍｏｌ）の供試薬剤（ＭｇＯ粉末）１３を添加すると
同時に、ｐＨ電極４に接続されたｐＨコントローラ５を
スタートさせ、反応容器１内液ｐＨが所定値（６．０）
一定となるように、オービュレット６で中和滴定試薬
（２Ｎ−Ｈ2 ＳＯ4 ）を注入した。反応容器１内に供試
薬剤１３を添加するときから、容器１内液ｐＨ経時変化
及び中和滴定試薬注入積算量を、データ処理装置７に取
り込んだ。そのデータ出力の結果を、図２及び図３に示
す。The test was performed according to the following procedure.
First, a predetermined amount (200 ml) of pure water was injected into the reaction vessel 1, and the mixture was stirred by the stirrer 3 at a constant speed (180 rpm) so that the liquid in the vessel 1 became uniform. Next, N 2 gas 12
Is introduced into the water in the reaction vessel 1 (dissolved oxygen purge) at a predetermined flow rate (70 ml / min) through the flow control valve 11 and the flow meter 10 while the hot plate 2 and the thermometer 8 and the temperature controller 9 Then, the temperature of the water in the reaction vessel 1 was maintained at a predetermined temperature (50 ° C.). Further, a predetermined amount (18
(mmol) of the reagent agent (MgO powder) 13 and at the same time, the pH controller 5 connected to the pH electrode 4 is started, and the pH of the liquid in the reaction vessel 1 becomes a predetermined value (6.0).
A neutralizing titrant (2N—H 2 SO 4 ) was injected with Auburette 6 so as to be constant. From the time when the reagent 13 was added to the reaction container 1, the change in the pH of the solution in the container 1 with time and the integrated amount of the injection of the neutralization titration reagent were taken into the data processing device 7. The results of the data output are shown in FIGS.
【００１７】図２及び図３は、本発明の評価装置による
測定結果であり、図２（Ａ社ＭｇＯ粉使用）が良好薬
剤、図３（Ｂ社ＭｇＯ粉使用）が粗悪薬剤を供試して得
られたデータパターンを示している。これらの図より、
粗悪薬剤供試の場合に比較して、良好薬剤供試によれ
ば、より短時間で理論滴定終了点に近づくことがわかっ
た。なお、ＭｇＯ粉の分類としては、６０分間の評価で
理論滴定終了点に対して、２Ｎ−Ｈ2 ＳＯ4 積算滴定量
が８０％以上となるものを良好ＭｇＯ粉、７０％未満で
あるものを粗悪ＭｇＯ粉、７０％以上８０％未満のもの
を要注意ＭｇＯ粉としている。2 and 3 show the results of measurement by the evaluation apparatus of the present invention. FIG. 2 (using MgO powder from Company A) shows a good drug, and FIG. 3 (using MgO powder from Company B) shows a poor drug. The obtained data pattern is shown. From these figures,
It was found that the good drug test approached the theoretical titration end point in a shorter time than the bad drug test. As the classification of the MgO powder, the theoretical titration end point in the evaluation of 60 minutes, 2N-H 2 SO 4 those integrated titration is 80% or more favorable MgO powder, what is less than 70% The poor MgO powder, 70% or more and less than 80%, is regarded as cautionary MgO powder.
【００１８】このような試験により、粉状脱粒薬剤の溶
解速度を総合的かつ迅速に評価できる。そして、溶解速
度が遅い粗悪薬剤の実機適用を未然に防止することがで
きるため、粉状脱硫薬剤の溶解速度に起因する湿式排煙
脱硫装置のトラブルを、軽減あるいは防止することがで
きる。By such a test, the dissolution rate of the powdered granulated drug can be comprehensively and quickly evaluated. Further, since it is possible to prevent the application of a poorly-degraded chemical having a low dissolution rate to an actual machine beforehand, it is possible to reduce or prevent troubles in the wet flue gas desulfurization apparatus due to the dissolution rate of the powdery desulfurization chemical.
【００１９】[0019]
【発明の効果】本発明の評価方法の適用により、湿式排
煙脱硫装置の性能やトラブル発生に大きく影響する粉状
脱硫薬剤の溶解速度を総合的に、かつ迅速に評価でき
る。そして、溶解速度が非常に遅い粗悪薬剤の実機適用
を未然に防止することができるため、粉状脱硫薬剤の溶
解速度に起因するトラブルを軽減あるいは防止すること
ができる。したがって、本発明によれば、湿式排煙脱硫
装置の安定運転性及び信頼性の向上が図れるとともに、
トラブル対応に必要とされる費用の節減が可能となる。
本発明は産業上極めて大きな意義を有する。By applying the evaluation method of the present invention, it is possible to comprehensively and quickly evaluate the dissolution rate of a powdery desulfurization agent which greatly affects the performance of a wet flue gas desulfurization apparatus and the occurrence of troubles. In addition, since it is possible to prevent the application of a poor drug having a very low dissolution rate to an actual machine, it is possible to reduce or prevent troubles caused by the dissolution rate of the powdery desulfurization drug. Therefore, according to the present invention, stable operation and reliability of the wet flue gas desulfurization device can be improved,
Costs required for troubleshooting can be reduced.
The present invention is of great industrial significance.
【図１】本発明に係る溶解速度評価装置の実施の形態の
１つを示す配置図である。FIG. 1 is a layout view showing one embodiment of a dissolution rate evaluation device according to the present invention.
【図２】ＭｇＯ粉（良好薬剤）を供試した際の滴定曲線
を示した図である。FIG. 2 is a diagram showing a titration curve when MgO powder (good drug) was tested.
【図３】ＭｇＯ粉（粗悪薬剤）を供試した際の滴定曲線
を示した図である。FIG. 3 is a diagram showing a titration curve when MgO powder (poor drug) was tested.
１ 反応容器 ２ ホットプレート ３ 攪拌機 ４ ｐＨ電極 ５ ｐＨコントローラー ６ オービュレット ７ データ処理装置 ８ 温度計 ９ 温度調節器 １０ 流量計 １１ 流量弁 １２ Ｎ2 ガス １３ 供試剤（供試薬剤） １４ ｐＨ曲線 １５ ２Ｎ−Ｈ2 ＳＯ4 積算滴定量 １６ 理論滴定終了点1 reaction vessel 2 hotplate 3 stirrer 4 pH electrode 5 pH controller 6 O burette 7 data processing device 8 thermometer 9 temperature regulator 10 flowmeter 11 flow valve 12 N 2 gas 13 test preparation (test agent) 14 pH curve 15 2N-H 2 SO 4 integrated titration 16 Theoretical titration end point
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１０年５月１日[Submission date] May 1, 1998
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Correction target item name] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】粉状ア
ルカリ性薬剤を脱硫剤として適用する湿式排煙脱硫装置
の性能は、粉状アルカリ性薬剤の溶剤への溶解速度（活
性度）に大きく影響される。しかしながら、従来、この
溶解速度（活性度）データは、薬剤納入メーカーの指示
値である独自の時間，％表示をそのまま信用するか、あ
るいは、薬剤純度及び粒径分布測定結果より経験的に推
定していた。このような溶解速度データを利用して排煙
脱硫装置に適用すると、しばしば装置トラブルの原因と
なり、安定的かつ信頼性の高い装置の運転が困難になる
問題が生じていた。また、脱硫剤を長期間保存したよう
なときには、該脱硫剤表面に膜等ができる場合がある。
このような状態になった薬剤は、一般に溶け難いため、
実機に用いるとトラブルの原因となり、運転が困難にな
る問題が生じていた。2. Description of the Related Art The performance of a wet flue gas desulfurization apparatus using a powdery alkaline chemical as a desulfurizing agent is greatly affected by the dissolution rate (activity) of the powdery alkaline chemical in a solvent. You. However, in the past, this dissolution rate (activity) data has to be used as it is, based on the original time and% indications specified by the drug supplier, or empirically estimated from the results of drug purity and particle size distribution measurements. I was Applying such melting rate data to flue gas desulfurization equipment often causes equipment troubles, causing a problem in that stable and reliable equipment operation becomes difficult. When the desulfurizing agent is stored for a long period of time, a film or the like may be formed on the surface of the desulfurizing agent.
Drugs in such a state are generally difficult to dissolve,
If it is used in an actual machine, it causes a trouble, and there has been a problem that driving becomes difficult.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００３[Correction target item name] 0003
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００３】本発明者らは、上記問題点に鑑み、湿式排
煙脱硫装置の安定運転性及び信頼性の向上が図れるとと
もに、トラブル対応に必要とされるコスト低減が可能と
なるような粉状脱硫薬剤の溶解速度評価方法を開発すべ
く鋭意検討した。その結果、本発明者らは、粉状脱硫薬
剤を使用する際には、該脱硫剤の溶解速度を的確かつ迅
速に知ることが必要であるとの観点から、粉状脱硫薬剤
を含む溶液を反応容器に入れ、該溶液の温度を維持しな
がらｐＨを所定値になるまで中和滴定試薬を徐々に注入
し、該注入量から溶解速度を評価することにより、かか
る問題点が解決されることを見い出した。本発明は、か
かる見地より完成されたものである。[0003] In view of the above problems, the present inventors have attempted to improve the stable operation and reliability of a wet flue gas desulfurization apparatus and to reduce the cost required for troubleshooting. We worked diligently to develop a method for evaluating the dissolution rate of desulfurizing agents. As a result, the present inventors, when using the powdery desulfurization agent, from the viewpoint that it is necessary to know the dissolution rate of the desulfurization agent accurately and quickly, from the viewpoint of the solution containing the powdery desulfurization agent Such a problem can be solved by gradually injecting the neutralization titration reagent into a reaction vessel until the pH reaches a predetermined value while maintaining the temperature of the solution, and evaluating the dissolution rate from the injected amount. I found The present invention has been completed from such a viewpoint.
Claims (4)
応容器に入れ、該溶液の温度を一定に維持しながら該溶
液のｐＨを所定値になるまで中和滴定試薬を注入し、該
注入量から溶解速度を評価することを特徴とする粉状脱
硫薬剤の溶解速度評価方法。1. A solution obtained by mixing a powdery desulfurization agent with a solvent is placed in a reaction vessel, and a neutralization titration reagent is injected until the pH of the solution reaches a predetermined value while maintaining the temperature of the solution constant. A method for evaluating the dissolution rate of a powdery desulfurization drug, comprising evaluating the dissolution rate from an injection amount.
であることを特徴とする請求項１記載の粉状脱硫薬剤の
溶解速度評価方法。2. The method according to claim 1, wherein the neutralization titration reagent is 2N—H 2 SO 4
2. The method for evaluating the dissolution rate of a powdery desulfurizing agent according to claim 1, wherein:
を特徴とする請求項１又は２記載の粉状脱硫薬剤の溶解
速度評価方法。3. The method for evaluating the dissolution rate of a powdery desulfurizing agent according to claim 1, wherein the powdery desulfurizing agent is MgO.
硫薬剤を供給する粉状脱硫薬剤供給手段と、該粉状脱硫
薬剤を該溶媒に混合した溶液を均一に攪拌する攪拌手段
及び該溶液を一定温度まで加熱する加熱手段を備えた反
応容器と、上記溶液のｐＨを検出するｐＨ検出手段と、
上記溶液に中和滴定試薬を供給する中和滴定試薬供給手
段と、該中和滴定試薬供給手段から供給される中和滴定
試薬の供給量を記録する中和滴定試薬供給記録手段とか
らなり、記録された中和滴定試薬供給量から上記粉状脱
硫薬剤の上記溶媒に対する溶解度を評価することを特徴
とする粉状脱硫薬剤の溶解速度評価装置。4. A solvent injection means for injecting a solvent, a powdery desulfurization agent supply means for supplying a powdery desulfurization agent, a stirring means for uniformly stirring a solution obtained by mixing the powdery desulfurization agent with the solvent, and A reaction vessel provided with a heating means for heating the solution to a certain temperature, and a pH detection means for detecting the pH of the solution,
A neutralization titration reagent supply means for supplying a neutralization titration reagent to the solution, and a neutralization titration reagent supply recording means for recording a supply amount of the neutralization titration reagent supplied from the neutralization titration reagent supply means, An apparatus for evaluating the dissolution rate of a powdery desulfurization agent, wherein the solubility of the powdery desulfurization agent in the solvent is evaluated from the recorded neutralization titration reagent supply amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10024776A JPH11221433A (en) | 1998-02-05 | 1998-02-05 | Method and apparatus for evaluating dissolution rate of powder desulfurization agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10024776A JPH11221433A (en) | 1998-02-05 | 1998-02-05 | Method and apparatus for evaluating dissolution rate of powder desulfurization agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11221433A true JPH11221433A (en) | 1999-08-17 |
Family
ID=12147589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10024776A Withdrawn JPH11221433A (en) | 1998-02-05 | 1998-02-05 | Method and apparatus for evaluating dissolution rate of powder desulfurization agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11221433A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005116635A1 (en) * | 2004-05-25 | 2005-12-08 | Sirius Analytical Instruments Ltd | Method for determining solubility of a chemical compound |
| WO2013164629A1 (en) * | 2012-05-02 | 2013-11-07 | Ucl Business Plc | Apparatus and method for testing medicaments |
| CN112782158A (en) * | 2020-12-28 | 2021-05-11 | 杭州电子科技大学 | Monitoring system for crude copper desulfurization |
-
1998
- 1998-02-05 JP JP10024776A patent/JPH11221433A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005116635A1 (en) * | 2004-05-25 | 2005-12-08 | Sirius Analytical Instruments Ltd | Method for determining solubility of a chemical compound |
| JP2008500526A (en) * | 2004-05-25 | 2008-01-10 | シリウス アナリティカル インストゥルメンツ リミテッド | Determination of compound solubility |
| US7723119B2 (en) | 2004-05-25 | 2010-05-25 | Sirius Analytical Instruments Ltd. | Method for determining solubility of a chemical compound |
| JP4755180B2 (en) * | 2004-05-25 | 2011-08-24 | シリウス アナリティカル インストゥルメンツ リミテッド | Determination of compound solubility |
| WO2013164629A1 (en) * | 2012-05-02 | 2013-11-07 | Ucl Business Plc | Apparatus and method for testing medicaments |
| GB2509286A (en) * | 2012-05-02 | 2014-06-25 | Ucl Business Plc | Apparatus and method for testing medicaments |
| GB2509286B (en) * | 2012-05-02 | 2014-11-05 | Ucl Business Plc | Apparatus and method for testing medicaments |
| US10234467B2 (en) | 2012-05-02 | 2019-03-19 | Ucl Business Plc | Apparatus and method for testing medicaments |
| CN112782158A (en) * | 2020-12-28 | 2021-05-11 | 杭州电子科技大学 | Monitoring system for crude copper desulfurization |
| CN112782158B (en) * | 2020-12-28 | 2023-09-08 | 杭州电子科技大学 | Monitoring system for blister copper desulfurization |
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