JP2000325747A - Process and device for removing mercury in combustion exhaust gas of coal - Google Patents
Process and device for removing mercury in combustion exhaust gas of coalInfo
- Publication number
- JP2000325747A JP2000325747A JP11138079A JP13807999A JP2000325747A JP 2000325747 A JP2000325747 A JP 2000325747A JP 11138079 A JP11138079 A JP 11138079A JP 13807999 A JP13807999 A JP 13807999A JP 2000325747 A JP2000325747 A JP 2000325747A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- coal
- gas
- mercury
- coals
- 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.)
- Granted
Links
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、石炭類の燃焼排ガ
ス中の水銀除去方法および装置に関し、特にボイラなど
の燃焼装置から排出される排ガス中に含まれる水銀を効
率的に除去する方法および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 method and an apparatus for removing mercury from combustion exhaust gas of coals, and more particularly to a method and an apparatus for efficiently removing mercury contained in exhaust gas discharged from a combustion apparatus such as a boiler. It is about.
【０００２】[0002]
【従来の技術】火力発電所等において、石炭などの化石
燃料の燃焼に伴って発生する排煙中の水銀（排煙中では
主として金属水銀または塩化水銀として存在）は含有量
は多くないが、その毒性の強さから処理技術の普及が望
まれている。排ガス中の水銀を除去する方法としては、
ごみ焼却炉から排出される排ガス中の水銀処理が盛んに
検討されている（特公平６−６１４２４号および同６−
１０４１８２号）。これはごみ焼却炉からの排ガス中に
より高濃度の水銀が含まれているためである。特公平６
−６１４２４号および同６−１０４１８２号には、吸収
液または固体吸収剤を排ガス中に噴霧し、排ガス中の水
銀を剤に捕集し、排ガス中のばい塵などとともに水銀を
捕集したものを後流のバグや電気集塵機などの集塵装置
で回収する方法が開示されている。図６は、石炭焚きの
火力発電所にこのような固体吸収剤を排ガス中に噴霧し
て排ガス中の水銀を除去する排煙処理システムの一例を
示したものである。2. Description of the Related Art In a thermal power plant, mercury in flue gas (present mainly as metallic mercury or mercury chloride in flue gas) generated by the combustion of fossil fuels such as coal is not large, Due to its toxicity, the spread of treatment technology is desired. As a method for removing mercury in exhaust gas,
The treatment of mercury in exhaust gas discharged from refuse incinerators has been actively studied (Japanese Patent Publication Nos. 6-61424 and 6-61424).
104182). This is because the exhaust gas from the refuse incinerator contains a higher concentration of mercury. Tokuhei 6
JP-A-614424 and JP-A-6-104182 disclose a method in which an absorbing liquid or a solid absorbent is sprayed into exhaust gas, mercury in the exhaust gas is collected by the agent, and mercury is collected together with dust and the like in the exhaust gas. A method of collecting by a dust collector such as a wake bug or an electric dust collector is disclosed. FIG. 6 shows an example of a flue gas treatment system for spraying such a solid absorbent into exhaust gas to a coal-fired thermal power plant to remove mercury in the exhaust gas.
【０００３】ボイラ２から排出される排ガスＤは、脱硝
装置４、Ａ／Ｈ（エアヒータ、以下同様）５およびＧＧ
Ｈ（ガスガスヒータ、以下同様）の熱回収部６を経由し
て水銀除去装置１３に導かれ、そこでライン１４から供
給された固体吸収剤Ｅが噴霧される。排ガス中の水銀を
含んだ吸着剤はばい塵とともに後流のＥＰ（電気集塵装
置、以下同様）７に導かれ、排ガス中のばい塵とともに
水銀を含んだ吸収剤が除去される。ＥＰ７で除去されな
かったばい塵を含む排ガスは脱硫装置８に導入され、排
ガス中のＳＯ2 が除去され、さらに脱硫装置８から排出
された排ガスはＧＧＨの再加熱部９で排ガス温度を高め
られた後、煙突１０から排出される。The exhaust gas D discharged from the boiler 2 is supplied to a denitration device 4, an A / H (air heater, hereinafter the same) 5 and a GG
The H (gas gas heater, hereinafter the same) heat guide unit 6 is led to the mercury removal device 13 through which the solid absorbent E supplied from the line 14 is sprayed. The adsorbent containing mercury in the exhaust gas is guided to the downstream EP (electrostatic precipitator, the same applies hereinafter) 7 together with the dust, and the absorbent containing mercury together with the dust in the exhaust gas is removed. Exhaust gas containing soot and dust not removed in EP 7 is introduced into a desulfurizer 8 to remove SO 2 from the exhaust gas. Further, the exhaust gas discharged from the desulfurizer 8 is subjected to a reheating unit 9 of GGH to increase the temperature of the exhaust gas. After that, it is discharged from the chimney 10.
【０００４】しかし、このような従来技術では、吸収液
または固体吸収剤を排ガス中に噴霧する装置および吸収
液または固体吸収剤と排ガスをある程度の時間（通常、
数秒）接触させるための反応器が必要になり、その設置
スペースを確保する必要がある。また、比較的高価な吸
収液または固体吸収剤を消費するのはいうまでもない。
新たに発電所を建設する場合は、あらかじめ必要なスペ
ースを確保しておけばよいが、既設の発電所にこのよう
な吸収液または固体吸収剤を排ガス中に噴霧する装置お
よび反応器を追設することとは実質的に不可能である。However, in such a conventional technique, an apparatus for spraying an absorbent or a solid absorbent into exhaust gas and an absorbent or a solid absorbent and exhaust gas for a certain time (usually,
(Several seconds) A reactor for contact is required, and it is necessary to secure an installation space for the reactor. It goes without saying that a relatively expensive absorbent or solid absorbent is consumed.
When constructing a new power plant, it is sufficient to secure the necessary space in advance.However, a device and a reactor for spraying such an absorbent or solid absorbent into the exhaust gas are added to the existing power plant. Is virtually impossible to do.
【０００５】既設のプラントに適用可能な方法として、
ごみ焼却炉においては、供給するごみに塩素化合物を添
加する方法（特公昭６２−４７５７２号）、また特公昭
６２−４７５７２号には、ごみ焼却炉に供給するごみに
塩素化合物を添加し、後流の洗浄装置で洗浄水により洗
浄して排ガス中の水銀を捕集・回収する方法（特公昭６
２−４７５７２号）が知られている。また、特公昭６２
−４７５７２号に示された技術では、集塵装置では水銀
は除去不可能であり、また洗浄水で効率よく除去するに
は、尿素やキレート剤などを添加する必要があるとして
いる。さらに、本発明者らが検討した結果、石炭焚きボ
イラ等からの排ガスのように亜硫酸ガス（以下、ＳＯ2
と呼ぶ）を多く含む場合、ＳＯ2 を除去するための脱硫
装置（一般的に石灰石−石膏法）が設置されるが、脱硫
装置内ではＳＯ2 を吸収した際には吸収液のｐＨが低下
し、また吸収液温度が５０℃程度になるため、尿素が分
解し易くなることがわかった。さらに、脱硫の吸収液中
には排ガスなどから起因する多くの金属が溶解している
ためキレート剤の効果が低くなり、脱硫装置内での水銀
の除去は高い効率が期待できないことが判明した。As a method applicable to an existing plant,
In a refuse incinerator, a chlorine compound is added to the refuse to be supplied (JP-B-62-47572). In JP-B-62-47572, a chlorine compound is added to the refuse to be supplied to the refuse incinerator. Method for collecting and collecting mercury in exhaust gas by washing with washing water using a washing device of the flow
No. 2-47572) is known. In addition, Tokiko Sho 62
According to the technique disclosed in Japanese Patent No. 47572, mercury cannot be removed by a dust collector, and urea or a chelating agent must be added to remove the mercury efficiently with washing water. Furthermore, as a result of investigations by the present inventors, sulfurous acid gas (hereinafter referred to as SO 2) such as exhaust gas from a coal-fired boiler
If containing a large amount of a called), desulfurization apparatus for removing SO 2 (typically limestone - gypsum method) but is installed, lowered the pH of the absorption liquid upon absorption of SO 2 in the desulfurization apparatus Further, it was found that the urea was easily decomposed because the temperature of the absorbing solution was about 50 ° C. Furthermore, since many metals derived from exhaust gas and the like are dissolved in the desulfurization absorption liquid, the effect of the chelating agent is reduced, and it has been found that high efficiency in removing mercury in the desulfurization device cannot be expected.
【０００６】[0006]
【発明が解決しようとする課題】上記の従来技術では、
高価な吸収液または固体吸収剤の消費量が多いばかりで
なく、吸収液または固体吸収剤を排ガス中に噴霧する装
置および反応器が必要になり、その設置スペースを確保
する必要がある。さらに、設置スペースの点から既設の
発電所では実質的に適用が不可能であるという問題点が
ある。また、既設の発電所に適用可能な技術では充分な
水銀除去率が期待できない。本発明の課題は、これらの
課題を解決し、経済的に既設の発電所に適用可能で、高
い水銀除去率を得る排ガス中の水銀除去方法および装置
を提案することにある。In the above prior art,
Not only is consumption of an expensive absorbent or solid absorbent large, but also a device and a reactor for spraying the absorbent or solid absorbent into the exhaust gas are required, and it is necessary to secure the installation space. Furthermore, there is a problem in that it is practically impossible to apply the method to an existing power plant in terms of installation space. In addition, sufficient mercury removal rates cannot be expected with technologies applicable to existing power plants. An object of the present invention is to solve these problems and to propose a method and an apparatus for removing mercury from exhaust gas, which can be economically applied to an existing power plant and can obtain a high mercury removal rate.
【０００７】[0007]
【課題を解決するための手段】上記課題を達成するた
め、本願で特許請求する発明は以下のとおりである。 （１）石炭類をボイラのような燃焼装置で燃焼する際、
該石炭類に予め塩素化合物を添加して燃焼させ、次いで
該燃焼装置の後流に設置された集塵装置で排ガス中のば
い塵を除去、回収することを特徴とする石炭類の燃焼排
ガス中の水銀除去方法。 （２）集塵装置入口のガス温度が１５０℃以下であるこ
とを特徴とする（１）記載の石炭類の燃焼排ガス中の水
銀除去方法。 （３）前記集塵装置の前流にガスガスヒータの熱回収部
を設置することを特徴とする（１）または（２）記載の
石炭類の燃焼排ガス中の水銀除去方法。Means for Solving the Problems To achieve the above object, the invention claimed in the present application is as follows. (1) When burning coals with a combustion device such as a boiler,
A chlorine compound is added to the coals in advance, and the coals are burnt. Then, dust in the flue gas is removed and collected by a dust collector installed downstream of the combustion device. Mercury removal method. (2) The method according to (1), wherein the gas temperature at the inlet of the dust collector is 150 ° C. or less. (3) The method according to (1) or (2), wherein a heat recovery unit of a gas gas heater is installed upstream of the dust collector.
【０００８】（４）石炭類に塩素化合物を予め添加する
方法として、塩素化合物の水溶液を粉砕前の石炭類に添
加することを特徴とする（１）ないし（３）のいずれか
に記載の石炭類の燃焼排ガス中の水銀除去方法。 （５）集塵装置出口ガス中の水銀濃度を測定し、その測
定値に基づいて石炭類に添加する塩素化合物の量を調整
することを特徴とする（１）ないし（４）のいずれかに
記載の石炭類の燃焼排ガス中の水銀除去方法。 （６）石炭類をボイラのような燃焼装置で燃焼する際、
塩素化合物を燃焼装置またはその出口以降の排ガス中に
供給し、後流に設置された集塵装置で排ガス中の水銀を
除去することを特徴とする石炭類の燃焼排ガス中の水銀
除去方法。(4) The method according to any one of (1) to (3), wherein the chlorine compound is previously added to the coal by adding an aqueous solution of the chlorine compound to the coal before pulverization. For removing mercury from combustion exhaust gases. (5) The method according to any one of (1) to (4), wherein the mercury concentration in the exhaust gas from the dust collector is measured, and the amount of the chlorine compound added to the coals is adjusted based on the measured value. A method for removing mercury from a combustion exhaust gas of coal as described above. (6) When burning coals with a combustion device such as a boiler,
A method for removing mercury from coal combustion exhaust gas, comprising supplying a chlorine compound to the exhaust gas after the combustion device or its outlet, and removing mercury from the exhaust gas by a dust collector installed downstream.
【０００９】（７）集塵装置入口のガス温度が１５０℃
以下であることを特徴とする（６）記載の石炭類の燃焼
排ガス中の水銀除去方法。 （８）集塵装置の前流でガスガスヒータにより熱回収を
行うことを特徴とする（６）または（７）記載の石炭類
の燃焼排ガス中の水銀除去方法。 （９）集塵装置出口ガス中の水銀濃度を測定し、その測
定値に基づいて石炭類に添加する塩素化合物の量を調整
することを特徴とする（６）ないし（８）のいずれかに
記載の石炭類の燃焼排ガス中の水銀除去方法。 （１０）燃焼装置に供給される石炭類に塩素化合物を添
加する手段と、該石炭類を燃焼装置で燃焼した際に発生
する排ガス中の粒子を除去する集塵装置とを備えたこと
を特徴とする石炭類の燃焼排ガス中の水銀除去装置。 （１１）集塵装置入口のガス温度を１５０℃以下にする
手段を有することを特徴とする（１０）記載の石炭類の
燃焼排ガス中の水銀除去装置。 （１２）集塵装置の前流にガスガスヒータの熱回収部を
設置したことを特徴とする（１０）または（１１）記載
の石炭類の燃焼排ガス中の水銀除去装置。(7) The gas temperature at the inlet of the dust collector is 150 ° C.
(6) The method for removing mercury in a combustion exhaust gas of coals according to (6), wherein: (8) The method according to (6) or (7), wherein heat recovery is performed by a gas gas heater upstream of the dust collector. (9) The method according to any one of (6) to (8), wherein the mercury concentration in the gas at the outlet of the dust collector is measured, and the amount of the chlorine compound added to the coals is adjusted based on the measured value. A method for removing mercury from a combustion exhaust gas of coal as described above. (10) It is characterized by comprising a means for adding a chlorine compound to coals supplied to the combustion device, and a dust collection device for removing particles in exhaust gas generated when the coals are burned by the combustion device. A device for removing mercury from the flue gas of coals. (11) The apparatus for removing mercury in the combustion exhaust gas of coals according to (10), further comprising means for reducing the gas temperature at the inlet of the dust collector to 150 ° C. or lower. (12) The device for removing mercury from coal flue gas according to (10) or (11), wherein a heat recovery unit of a gas gas heater is provided upstream of the dust collector.
【００１０】（１３）塩素化合物の水溶液を粉砕前の石
炭類に添加する手段を有することを特徴とする（１０）
ないし（１２）のいずれかに記載の石炭類の燃焼排ガス
中の水銀除去装置。 （１４）集塵装置出口ガス中の水銀濃度を測定する手段
と、その測定値に基づいて石炭類に添加する塩素化合物
の量を調整する手段とをさらに有することを特徴とする
（１０）ないし（１３）のいずれかに記載の石炭類の燃
焼排ガス中の水銀除去装置。[0013] (13) A means for adding an aqueous solution of a chlorine compound to coals before pulverization is provided (10).
The apparatus for removing mercury from coal flue gas according to any one of (12) to (12). (14) The apparatus further comprises means for measuring the mercury concentration in the gas at the outlet of the dust collector, and means for adjusting the amount of the chlorine compound added to the coal based on the measured value. (13) The apparatus for removing mercury in a combustion exhaust gas of coals according to any of (13).
【００１１】（１５）石炭類の燃焼装置またはその出口
以降の排ガス中に塩素化合物を供給する手段と、石炭類
を前記燃焼装置で燃焼した際に発生する排ガス中の粒子
を除去する集塵装置とを備えたことを特徴とする石炭類
の燃焼排ガス中の水銀除去装置。 （１６）集塵装置入口のガス温度を１５０℃以下にする
手段を有することを特徴とする（１５）記載の石炭類の
燃焼排ガス中の水銀除去装置。 （１７）集塵装置の前流にガスガスヒータの熱回収部を
設けたことを特徴とする（１５）または（１６）記載の
石炭類の燃焼排ガス中の水銀除去装置。 （１８）集塵装置出口ガス中の水銀濃度を測定する手段
と、その測定値に基づいて石炭に添加する塩素化合物の
量を調整する手段とをさらに有することを特徴とする
（１５）ないし（１７）のいずれかに記載の石炭類の燃
焼排ガス中の水銀除去装置。(15) Means for supplying a chlorine compound to the flue gas after the coal combustion device or its outlet, and a dust collector for removing particles in the flue gas generated when the coals are burned by the combustion device A device for removing mercury from combustion exhaust gas of coals, comprising: (16) The apparatus for removing mercury in the combustion exhaust gas of coals according to (15), further comprising means for reducing the gas temperature at the inlet of the dust collector to 150 ° C. or lower. (17) The apparatus for removing mercury from coal flue gas according to (15) or (16), wherein a heat recovery unit of a gas gas heater is provided upstream of the dust collector. (18) The apparatus further comprises means for measuring the mercury concentration in the exhaust gas at the dust collector, and means for adjusting the amount of the chlorine compound added to the coal based on the measured value. 17) The apparatus for removing mercury from coal flue gas according to any one of 17).
【００１２】本発明で用いる塩素化合物としては、塩化
ナトリウム、塩化カリウム、塩化カルシウム等の塩化物
が代表的なものとして挙げられる。As the chlorine compound used in the present invention, chlorides such as sodium chloride, potassium chloride and calcium chloride are representative.
【００１３】[0013]
【発明の実施の形態】以下、本発明を下記の実施例を示
す図面によりさらに詳細に説明するが、本発明はこれら
の例で制限されるものではない。図１は、本発明の一実
施例を示す排ガス中の水銀除去方法のフロー図である。
石炭供給管１からボイラ２に供給される石炭Ａにライン
３から塩素化合物として塩化カルシウムＢが添加され、
ボイラ２で燃焼された後、灰粒子などのばい塵Ｃを含む
排出される排ガスＤは、脱硝装置４、Ａ／Ｈ５およびＧ
ＧＨの熱回収部６を経由してＥＰ７に導かれ、排ガス中
のばい塵Ｃが除去される。その際に、排ガスの水銀の一
部がばい塵表面に付着し、ＥＰ７によりばい塵Ｃととも
に回収される。ＥＰ７で除去されなかったばい塵を含む
排ガスは脱硫装置８に導入され、排ガス中のＳＯ2 が除
去される。さらに、脱硫装置８から排出された排ガスは
ＧＧＨの再加熱部９では排ガス温度を高められ、煙突１
０から排出される。石炭に添加する塩素カルシウムＢの
量は、ＥＰ７出口ガス中の水銀濃度を水銀計測装置１１
で測定し、その測定値に基づいて調整される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the drawings showing the following examples, but the present invention is not limited to these examples. FIG. 1 is a flow chart of a method for removing mercury from exhaust gas showing one embodiment of the present invention.
Calcium chloride B is added as a chlorine compound from line 3 to coal A supplied from coal supply pipe 1 to boiler 2,
After being burned in the boiler 2, the exhaust gas D containing the dust C such as ash particles is discharged to the denitration device 4, A / H5 and G
It is led to the EP 7 via the GH heat recovery unit 6, and the dust C in the exhaust gas is removed. At that time, part of the mercury in the exhaust gas adheres to the surface of the dust and is collected together with the dust C by EP7. Exhaust gas containing soot and dust not removed in EP 7 is introduced into a desulfurization device 8 to remove SO 2 in the exhaust gas. Further, the exhaust gas discharged from the desulfurization unit 8 is heated at the reheating unit 9 of the GGH to increase the temperature of the exhaust gas.
Emitted from 0. The amount of calcium chloride B added to the coal is determined by measuring the mercury concentration in the outlet gas of EP7 using a mercury measuring device 11.
And adjusted based on the measured values.
【００１４】図２は、図１に示した実施例での塩化カル
シウム添加装置の詳細を示す。タンク２１に蓄えれらた
塩化カルシウムＢ溶液はライン２２を通じてポンプ２３
により、バンカ２４から石炭定量供給機２５により粗粉
砕機２６に送られる途中の石炭Ａに添加される。粗粉砕
機２６から石炭供給管２７を通じてバンカ２８に送られ
た石炭Ａは、石炭定量供給機２９により微粉砕機３０に
送られて所定の粒度に微粉砕された後、石炭供給管３１
からボイラ２のバーナ（図示せず）に送られて燃焼され
る。塩化カルシウムの添加量は、水銀計測装置１１で測
定されたＥＰ７出口ガス中の水銀濃度測定値およびその
設定濃度に基づいて、演算器３２によりその最適添加量
が計算され、ポンプ２３から供給される塩化カルシウム
Ｂ溶液の流量が調整される。FIG. 2 shows the details of the apparatus for adding calcium chloride in the embodiment shown in FIG. The calcium chloride B solution stored in the tank 21 is supplied through a line 22 to a pump 23.
Is added to the coal A being sent from the bunker 24 to the coarse crusher 26 by the coal quantitative feeder 25. The coal A sent from the coarse crusher 26 to the bunker 28 through the coal supply pipe 27 is sent to the fine crusher 30 by the coal quantitative feeder 29 and finely crushed to a predetermined particle size.
Is sent to a burner (not shown) of the boiler 2 for combustion. Based on the measured value of mercury concentration in the EP7 outlet gas measured by the mercury measuring device 11 and the set concentration, the optimum amount of calcium chloride is calculated by the calculator 32 and supplied from the pump 23. The flow rate of the calcium chloride B solution is adjusted.
【００１５】図３には、石炭の性状やＥＰ入口での排ガ
ス温度など他の条件が一定で、石炭中の塩素濃度がＥＰ
での水銀の除去率（ＥＰ入口排ガスＤ中に含まれていた
水銀のうち、ばい塵Ｃとともに回収された水銀の割合、
以下同様）に及ぼす影響を示す。石炭中の塩素濃度が高
くなるほど水銀の除去率が高まり、塩素として７００mg
／kg−石炭以上でほぼ一定となった。FIG. 3 shows that the other properties such as the properties of the coal and the exhaust gas temperature at the EP inlet are constant, and the chlorine concentration in the coal is EP.
Removal rate of mercury in the mercury contained in the EP inlet exhaust gas D
The same shall apply hereinafter). The higher the chlorine concentration in coal, the higher the mercury removal rate; 700 mg of chlorine
/ Kg-coal and became almost constant.
【００１６】また、石炭中の塩素濃度が一定で、ＥＰ入
口での排ガス温度がＥＰでの水銀の除去率に及ぼす影響
を図４に示す。石炭中の塩素濃度が高くても、ＥＰ入口
での排ガス温度が１５０℃以上になると水銀の除去率は
きわめて低くなるので、ＥＰ入口での排ガス温度として
は１５０℃以下（好ましくは１００℃以下）にする必要
がある。ＥＰ入口での排ガス温度を調整する具体的な手
段の一例としては、図１に示した実施例のようにＥＰ前
にＧＧＨの熱回収部を設置し、その運転条件を適切にす
ることにより達成できる。FIG. 4 shows the effect of the exhaust gas temperature at the EP inlet on the mercury removal rate in the EP while the chlorine concentration in the coal is constant. Even if the chlorine concentration in the coal is high, the mercury removal rate becomes extremely low when the exhaust gas temperature at the EP inlet is 150 ° C. or more, so the exhaust gas temperature at the EP inlet is 150 ° C. or less (preferably 100 ° C. or less). Need to be As an example of a specific means for adjusting the exhaust gas temperature at the EP inlet, this can be achieved by installing a GGH heat recovery unit before the EP and making the operating conditions appropriate as in the embodiment shown in FIG. it can.
【００１７】塩素化合物添加の効果が飽和になる塩素化
合物添加量は石炭の性状や水銀含有量、排ガス温度など
によっても影響されるので、ＥＰ７出口ガス中の水銀濃
度を水銀計測装置１１で測定し、その測定値に基づいて
石炭に添加する塩化カルシウムＢの量を調整することが
好ましい。具体的には、ＥＰ７出口ガス中の水銀濃度が
目標とする濃度より高い場合には塩化カルシウムＢの添
加量を増加させるが、必要以上に塩化カルシウムを添加
することは経済的でないばかりでなく、ＥＰや脱硫装置
などの金属材料の腐食の原因となるので注意する必要が
ある。このためＥＰ７出口ガス中の水銀濃度を測定し、
塩化カルシウムＢの添加量を調整することは有効であ
る。Since the amount of the chlorine compound added at which the effect of the addition of the chlorine compound becomes saturated is also affected by the properties of the coal, the mercury content, the temperature of the exhaust gas, etc., the mercury concentration in the EP7 outlet gas is measured by the mercury measuring device 11. It is preferable to adjust the amount of calcium chloride B added to the coal based on the measured value. Specifically, when the mercury concentration in the EP7 outlet gas is higher than the target concentration, the amount of calcium chloride B added is increased. However, adding calcium chloride more than necessary is not economical, Care must be taken because it causes corrosion of metal materials such as EP and desulfurization equipment. Therefore, the mercury concentration in the EP7 outlet gas was measured,
It is effective to adjust the amount of calcium chloride B added.
【００１８】図５は、図２に示した実施例で石炭中に塩
素化合物を添加する代わりに、排ガス中に塩素化合物を
水溶液の状態で添加する方法の装置構成を示す図であ
る。石炭供給管１からボイラ２に供給される石炭Ａとは
別に、ライン１２から塩化カルシウムＢが水溶液として
ボイラ内に噴霧され、灰粒子などのばい塵Ｃを含む排出
される排ガスＤは、脱硝装置４、Ａ／Ｈ５およびＧＧＨ
の熱回収部６を経由してＥＰ７に導かれ、排ガス中のば
い塵Ｃが除去される。その際に、排ガス中の水銀の一分
がばい塵表面に付着し、ＥＰ７によりばい塵Ｃとともに
回収される。ＥＰ７で除去されなかったばい塵を含む排
ガスは脱硫装置８に導入され、排ガス中のＳＯ2 が除去
される。さらに、脱硫装置８から排出された排ガスは、
ＧＧＨの再加熱部９で排ガス温度を高められた後、煙突
１０から排出される。本実施例ではボイラ内に塩化カル
シウム水溶液を噴霧するため、噴霧用のノズルがあれば
よく、従来技術のような吸収液または固体吸収剤と排ガ
スとをある程度の時間接触させるための反応器は必要と
しないという利点がある。FIG. 5 is a diagram showing an apparatus configuration of a method for adding a chlorine compound to an exhaust gas in the form of an aqueous solution instead of adding a chlorine compound to coal in the embodiment shown in FIG. Separately from the coal A supplied from the coal supply pipe 1 to the boiler 2, calcium chloride B is sprayed into the boiler from the line 12 as an aqueous solution, and the discharged exhaust gas D containing dust C such as ash particles is discharged into a denitration apparatus. 4, A / H5 and GGH
The exhaust gas is guided to the EP 7 through the heat recovery unit 6 to remove the dust C in the exhaust gas. At that time, a part of the mercury in the exhaust gas adheres to the surface of the dust and is collected together with the dust C by EP7. Exhaust gas containing soot and dust not removed in EP 7 is introduced into a desulfurization device 8 to remove SO 2 in the exhaust gas. Further, the exhaust gas discharged from the desulfurization device 8 is
After the exhaust gas temperature is increased in the GGH reheating unit 9, the exhaust gas is discharged from the chimney 10. In this embodiment, a spray nozzle may be provided for spraying the aqueous calcium chloride solution into the boiler, and a reactor for contacting the absorbent or solid absorbent with the exhaust gas for a certain time as in the prior art is required. There is an advantage that it does not.
【００１９】上記の実施例では塩素化合物として塩化カ
ルシウムを用いているが、塩化ナトリウムなど他の塩化
物でもかまわない。また、上記実施例では塩化カルシウ
ムの水溶液を用いているが、粉体で石炭に添加したり、
ボイラ以外の排ガスライン等で排ガス中に添加すること
も可能である。しかし、塩化カルシウムは潮解性で空気
中の水分を吸収し易いので、水溶液として使用したほう
が取扱いが容易である。上記の実施例で用いている水銀
計測装置は、ガス中の水銀濃度を測定できるものであれ
ば、どのような原理の測定装置でも使用可能である。In the above embodiment, calcium chloride is used as the chlorine compound, but other chlorides such as sodium chloride may be used. In the above embodiment, an aqueous solution of calcium chloride is used.
It is also possible to add to exhaust gas in an exhaust gas line other than the boiler. However, since calcium chloride is deliquescent and easily absorbs moisture in the air, it is easier to handle it as an aqueous solution. The mercury measuring device used in the above embodiment can use any measuring device of any principle as long as it can measure the mercury concentration in the gas.
【００２０】[0020]
【発明の効果】本発明によれば、既設のボイラ等の燃焼
装置にも適用可能で、設置スペースが少なくてすむ、高
効率の排ガス中の水銀除去方法および装置を提供するこ
とができる。According to the present invention, it is possible to provide a highly efficient method and apparatus for removing mercury from exhaust gas, which can be applied to an existing boiler or other combustion apparatus and requires a small installation space.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明による実施例の排煙処理システムのフロ
ーを示す図。FIG. 1 is a diagram showing a flow of a flue gas treatment system according to an embodiment of the present invention.
【図２】本実施例の装置の詳細フローを示す図。FIG. 2 is a diagram showing a detailed flow of the apparatus of the present embodiment.
【図３】本発明法に関する実験データを示す図。FIG. 3 is a view showing experimental data relating to the method of the present invention.
【図４】本発明法に関する実験データを示す図。FIG. 4 is a view showing experimental data relating to the method of the present invention.
【図５】本発明による実施例の排煙処理システムのフロ
ーを示す図。FIG. 5 is a diagram showing a flow of the smoke exhaust treatment system of the embodiment according to the present invention.
【図６】従来技術に基づく排煙処理システムのフローを
示す図。FIG. 6 is a diagram showing a flow of a flue gas treatment system based on a conventional technique.
１…石炭供給管、２…ボイラ、３…ライン、４…脱硝装
置、５…Ａ／Ｈ（エアヒータ）、６…ＧＧＨ（ガスガス
ヒータ）熱回収部、７…ＥＰ（電気集塵装置）、８…脱
硫装置、９…ＧＧＨ再加熱部、１０…煙突、１１…水銀
計測装置、１２…ライン、１３…水銀除去装置、１４…
ライン、２１…タンク、２２…ライン、２３…ポンプ、
２４…バンカ、２５…石炭定量供給機、２６…粗粉砕
機、２７…石炭供給管、２８…バンカ、２９…石炭定量
供給機、３０…微粉砕機、３１…石炭供給管、３２…演
算器。Ａ…石炭、Ｂ…塩化カルシウム、Ｃ…ばい塵、Ｄ
…排ガス、Ｅ…吸収剤。DESCRIPTION OF SYMBOLS 1 ... Coal supply pipe, 2 ... Boiler, 3 ... Line, 4 ... Denitration device, 5 ... A / H (air heater), 6 ... GGH (gas gas heater) heat recovery part, 7 ... EP (Electric dust collector), 8 ... desulfurization equipment, 9 ... GHH reheating unit, 10 ... chimney, 11 ... mercury measurement device, 12 ... line, 13 ... mercury removal device, 14 ...
Line, 21 ... tank, 22 ... line, 23 ... pump,
24 ... Banka, 25 ... Coal quantitative feeder, 26 ... Coarse crusher, 27 ... Coal supply pipe, 28 ... Banker, 29 ... Coal quantitative feeder, 30 ... Fine crusher, 31 ... Coal supply pipe, 32 ... Calculator . A: coal, B: calcium chloride, C: dust, D
... exhaust gas, E ... absorbent.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高本 成仁 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 (72)発明者 野沢 滋 広島県呉市宝町６番９号 バブコック日立 株式会社呉工場内 Ｆターム(参考） 3K070 DA07 DA09 DA22 DA23 DA30 DA45 DA58 DA83 4D002 AA29 AC01 BA03 BA05 BA14 CA01 DA02 DA03 DA05 DA17 GA01 GA03 GB03 GB06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Narito Takamoto 3-36 Takara-cho, Kure-shi, Hiroshima Pref. Inside the Kure Research Laboratory, Babcock Hitachi, Ltd. (72) Inventor Shigeru Nozawa 6-9 Takara-cho, Kure-shi, Hiroshima Pref. 3K070 DA07 DA09 DA22 DA23 DA30 DA45 DA58 DA83 4D002 AA29 AC01 BA03 BA05 BA14 CA01 DA02 DA03 DA05 DA17 GA01 GA03 GB03 GB06
Claims (18)
する際、該石炭類に予め塩素化合物を添加して燃焼さ
せ、次いで該燃焼装置の後流に設置された集塵装置で排
ガス中のばい塵を除去、回収することを特徴とする石炭
類の燃焼排ガス中の水銀除去方法。When a coal is combusted by a combustion device such as a boiler, a chlorine compound is added to the coal in advance to burn the coal, and then the coal is burned by a dust collector installed downstream of the combustion device. A method for removing mercury from coal flue gas, comprising removing and collecting soot and dust.
であることを特徴とする請求項１記載の石炭類の燃焼排
ガス中の水銀除去方法。2. The method according to claim 1, wherein the gas temperature at the inlet of the dust collector is 150 ° C. or less.
熱回収部を設置することを特徴とする請求項１または２
記載の石炭類の燃焼排ガス中の水銀除去方法。3. A heat recovery section of a gas gas heater is installed upstream of the dust collecting apparatus.
A method for removing mercury from a combustion exhaust gas of coal as described above.
として、塩素化合物の水溶液を粉砕前の石炭類に添加す
ることを特徴とする請求項１ないし３のいずれかに記載
の石炭類の燃焼排ガス中の水銀除去方法。4. The combustion of coals according to claim 1, wherein the method of adding the chlorine compounds to the coals in advance includes adding an aqueous solution of the chlorine compound to the coals before pulverization. A method for removing mercury from exhaust gas.
し、その測定値に基づいて石炭類に添加する塩素化合物
の量を調整することを特徴とする請求項１ないし４のい
ずれかに記載の石炭類の燃焼排ガス中の水銀除去方法。5. The method according to claim 1, wherein the mercury concentration in the gas at the outlet of the dust collector is measured, and the amount of the chlorine compound added to the coals is adjusted based on the measured value. A method for removing mercury from a combustion exhaust gas of coal as described above.
する際、塩素化合物を燃焼装置またはその出口以降の排
ガス中に供給し、後流に設置された集塵装置で排ガス中
の水銀を除去することを特徴とする石炭類の燃焼排ガス
中の水銀除去方法。6. When burning coals in a combustion device such as a boiler, a chlorine compound is supplied to exhaust gas after the combustion device or its outlet, and mercury in the exhaust gas is removed by a dust collector installed downstream. A method for removing mercury from a flue gas of coals, which comprises removing the same.
であることを特徴とする請求項６記載の石炭類の燃焼排
ガス中の水銀除去方法。7. The method according to claim 6, wherein the gas temperature at the inlet of the dust collector is 150 ° C. or less.
熱回収を行うことを特徴とする請求項６または７記載の
石炭類の燃焼排ガス中の水銀除去方法。8. The method according to claim 6, wherein heat recovery is performed by a gas gas heater upstream of the dust collector.
し、その測定値に基づいて石炭類に添加する塩素化合物
の量を調整することを特徴とする請求項６ないし８のい
ずれかに記載の石炭類の燃焼排ガス中の水銀除去方法。9. The method according to claim 6, wherein the mercury concentration in the exhaust gas from the dust collector is measured, and the amount of the chlorine compound added to the coals is adjusted based on the measured value. A method for removing mercury from a combustion exhaust gas of coal as described above.
合物を添加する手段と、該石炭類を燃焼装置で燃焼した
際に発生する排ガス中の粒子を除去する集塵装置とを備
えたことを特徴とする石炭類の燃焼排ガス中の水銀除去
装置。10. A fuel supply system comprising: means for adding a chlorine compound to coals supplied to a combustion device; and a dust collection device for removing particles in exhaust gas generated when the coals are burned by the combustion device. A device for removing mercury from coal flue gas.
下にする手段を有することを特徴とする請求項１０記載
の石炭類の燃焼排ガス中の水銀除去装置。11. The apparatus for removing mercury from combustion exhaust gas of coals according to claim 10, further comprising means for reducing the gas temperature at the inlet of the dust collecting apparatus to 150 ° C. or less.
回収部を設置したことを特徴とする請求項１０または１
１記載の石炭類の燃焼排ガス中の水銀除去装置。12. A heat recovery section of a gas gas heater is provided upstream of the dust collecting apparatus.
2. A device for removing mercury from coal flue gas according to claim 1.
に添加する手段を有することを特徴とする請求項１０な
いし１２のいずれかに記載の石炭類の燃焼排ガス中の水
銀除去装置。13. The apparatus for removing mercury from coal flue gas according to claim 10, further comprising means for adding an aqueous solution of a chlorine compound to coals before pulverization.
する手段と、その測定値に基づいて石炭類に添加する塩
素化合物の量を調整する手段とをさらに有することを特
徴とする請求項１０ないし１３のいずれかに記載の石炭
類の燃焼排ガス中の水銀除去装置。14. The apparatus according to claim 1, further comprising: means for measuring the mercury concentration in the gas at the outlet of the dust collecting apparatus; and means for adjusting the amount of the chlorine compound to be added to the coals based on the measured value. 14. An apparatus for removing mercury from coal flue gas according to any one of 10 to 13.
の排ガス中に塩素化合物を供給する手段と、石炭類を前
記燃焼装置で燃焼した際に発生する排ガス中の粒子を除
去する集塵装置とを備えたことを特徴とする石炭類の燃
焼排ガス中の水銀除去装置。15. A coal combustion apparatus or a means for supplying a chlorine compound to exhaust gas after the outlet thereof, a dust collector for removing particles in exhaust gas generated when the coal is burned by the combustion apparatus, and A device for removing mercury in combustion exhaust gas of coals, comprising:
下にする手段を有することを特徴とする請求項１５記載
の石炭類の燃焼排ガス中の水銀除去装置。16. The apparatus for removing mercury from coal flue gas according to claim 15, further comprising means for reducing the gas temperature at the inlet of the dust collector to 150 ° C. or lower.
回収部を設けたことを特徴とする請求項１５または１６
記載の石炭類の燃焼排ガス中の水銀除去装置。17. A heat recovery part of a gas gas heater is provided upstream of the dust collecting device.
An apparatus for removing mercury from a combustion exhaust gas of coal as described above.
する手段と、その測定値に基づいて石炭に添加する塩素
化合物の量を調整する手段とをさらに有することを特徴
とする請求項１５ないし１７のいずれかに記載の石炭類
の燃焼排ガス中の水銀除去装置。18. The apparatus according to claim 15, further comprising: means for measuring the concentration of mercury in the gas at the outlet of the dust collector; and means for adjusting the amount of chlorine compound added to the coal based on the measured value. 18. The apparatus for removing mercury in a combustion exhaust gas of coals according to any one of claims 17 to 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13807999A JP3698916B2 (en) | 1999-05-19 | 1999-05-19 | Method and apparatus for removing mercury from coal flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13807999A JP3698916B2 (en) | 1999-05-19 | 1999-05-19 | Method and apparatus for removing mercury from coal flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000325747A true JP2000325747A (en) | 2000-11-28 |
| JP3698916B2 JP3698916B2 (en) | 2005-09-21 |
Family
ID=15213476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13807999A Expired - Lifetime JP3698916B2 (en) | 1999-05-19 | 1999-05-19 | Method and apparatus for removing mercury from coal flue gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3698916B2 (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005059005A (en) * | 2003-08-14 | 2005-03-10 | General Electric Co <Ge> | System for diminishing mercury in combustion flue gas using coal mixture and method thereof |
| JP2005164228A (en) * | 2003-11-18 | 2005-06-23 | General Electric Co <Ge> | Mercury reduction system and method in combustion flue gas using staging |
| JP2006263513A (en) * | 2005-03-22 | 2006-10-05 | Kobelco Eco-Solutions Co Ltd | Method for removing mercury in incinerator waste gas |
| WO2008078721A1 (en) * | 2006-12-27 | 2008-07-03 | Babcock-Hitachi Kabushiki Kaisha | Exhaust gas treating method and apparatus |
| JP2008537587A (en) * | 2005-03-17 | 2008-09-18 | ノックス・ツー・インターナショナル・リミテッド | Reduction of mercury emissions from coal combustion. |
| JP2009028655A (en) * | 2007-07-27 | 2009-02-12 | Ihi Corp | Exhaust gas treating method and exhaust gas treatment apparatus |
| JP2009045522A (en) * | 2007-08-15 | 2009-03-05 | Ihi Corp | Exhaust gas treating method and treatment apparatus |
| WO2009130815A1 (en) * | 2008-04-25 | 2009-10-29 | 三菱重工業株式会社 | System for treating discharge gas and method of removing mercury from discharge gas |
| EP2127728A1 (en) * | 2006-12-27 | 2009-12-02 | Babcock-Hitachi Kabushiki Kaisha | Method and apparatus for treating discharge gas |
| US7662352B2 (en) | 2005-02-28 | 2010-02-16 | Mitsubishi Heavy Industries, Ltd. | Method and system for removing mercury from flue gas |
| US7955577B2 (en) | 2005-03-17 | 2011-06-07 | NOx II, Ltd | Reducing mercury emissions from the burning of coal |
| US8124036B1 (en) | 2005-10-27 | 2012-02-28 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
| US8150776B2 (en) | 2006-01-18 | 2012-04-03 | Nox Ii, Ltd. | Methods of operating a coal burning facility |
| US8372362B2 (en) | 2010-02-04 | 2013-02-12 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US8496894B2 (en) | 2010-02-04 | 2013-07-30 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US8524179B2 (en) | 2010-10-25 | 2013-09-03 | ADA-ES, Inc. | Hot-side method and system |
| US8574324B2 (en) | 2004-06-28 | 2013-11-05 | Nox Ii, Ltd. | Reducing sulfur gas emissions resulting from the burning of carbonaceous fuels |
| US8883099B2 (en) | 2012-04-11 | 2014-11-11 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US8951487B2 (en) | 2010-10-25 | 2015-02-10 | ADA-ES, Inc. | Hot-side method and system |
| US9669351B2 (en) | 2003-06-03 | 2017-06-06 | General Electric Technology Gmbh | Removal of mercury emissions |
| US10465137B2 (en) | 2011-05-13 | 2019-11-05 | Ada Es, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
| US10589292B2 (en) | 2013-08-16 | 2020-03-17 | ADA-ES, Inc. | Method to reduce mercury, acid gas, and particulate emissions |
| US10767130B2 (en) | 2012-08-10 | 2020-09-08 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
| US11298657B2 (en) | 2010-10-25 | 2022-04-12 | ADA-ES, Inc. | Hot-side method and system |
-
1999
- 1999-05-19 JP JP13807999A patent/JP3698916B2/en not_active Expired - Lifetime
Cited By (66)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9669351B2 (en) | 2003-06-03 | 2017-06-06 | General Electric Technology Gmbh | Removal of mercury emissions |
| JP2005059005A (en) * | 2003-08-14 | 2005-03-10 | General Electric Co <Ge> | System for diminishing mercury in combustion flue gas using coal mixture and method thereof |
| JP2005164228A (en) * | 2003-11-18 | 2005-06-23 | General Electric Co <Ge> | Mercury reduction system and method in combustion flue gas using staging |
| JP4718822B2 (en) * | 2003-11-18 | 2011-07-06 | ゼネラル・エレクトリック・カンパニイ | System and method for reducing mercury in combustion flue gas using staging |
| US8574324B2 (en) | 2004-06-28 | 2013-11-05 | Nox Ii, Ltd. | Reducing sulfur gas emissions resulting from the burning of carbonaceous fuels |
| US7662352B2 (en) | 2005-02-28 | 2010-02-16 | Mitsubishi Heavy Industries, Ltd. | Method and system for removing mercury from flue gas |
| US10962224B2 (en) | 2005-03-17 | 2021-03-30 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US10670265B2 (en) | 2005-03-17 | 2020-06-02 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
| EP3424585A1 (en) * | 2005-03-17 | 2019-01-09 | Nox II International, Ltd. | Reducing mercury emissions from the burning of coal |
| US9702554B2 (en) | 2005-03-17 | 2017-07-11 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US10359192B2 (en) | 2005-03-17 | 2019-07-23 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
| US10612779B2 (en) | 2005-03-17 | 2020-04-07 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US7955577B2 (en) | 2005-03-17 | 2011-06-07 | NOx II, Ltd | Reducing mercury emissions from the burning of coal |
| US10641483B2 (en) | 2005-03-17 | 2020-05-05 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US7988939B2 (en) | 2005-03-17 | 2011-08-02 | NOx II Ltd. | Sorbents for coal combustion |
| US9169453B2 (en) | 2005-03-17 | 2015-10-27 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US9945557B2 (en) | 2005-03-17 | 2018-04-17 | Nox Ii, Ltd. | Sorbents for coal combustion |
| CN103759249A (en) * | 2005-03-17 | 2014-04-30 | Noxii国际有限公司 | Reducing mercury emissions from the burning of coal |
| US8703081B2 (en) | 2005-03-17 | 2014-04-22 | Nox Ii, Ltd. | Sorbents for coal combustion |
| JP2008537587A (en) * | 2005-03-17 | 2008-09-18 | ノックス・ツー・インターナショナル・リミテッド | Reduction of mercury emissions from coal combustion. |
| US8545778B2 (en) | 2005-03-17 | 2013-10-01 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US11732889B2 (en) | 2005-03-17 | 2023-08-22 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal by remote sorbent addition |
| US11060723B2 (en) | 2005-03-17 | 2021-07-13 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal by remote sorbent addition |
| US11732888B2 (en) | 2005-03-17 | 2023-08-22 | Nox Ii, Ltd. | Sorbents for coal combustion |
| US8501128B2 (en) | 2005-03-17 | 2013-08-06 | Nox Ii, Ltd. | Reducing mercury emissions from the burning of coal |
| JP2006263513A (en) * | 2005-03-22 | 2006-10-05 | Kobelco Eco-Solutions Co Ltd | Method for removing mercury in incinerator waste gas |
| US8293196B1 (en) | 2005-10-27 | 2012-10-23 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
| US8124036B1 (en) | 2005-10-27 | 2012-02-28 | ADA-ES, Inc. | Additives for mercury oxidation in coal-fired power plants |
| US8150776B2 (en) | 2006-01-18 | 2012-04-03 | Nox Ii, Ltd. | Methods of operating a coal burning facility |
| JP5180097B2 (en) * | 2006-12-27 | 2013-04-10 | バブコック日立株式会社 | Exhaust gas treatment method and apparatus |
| EP2127728A1 (en) * | 2006-12-27 | 2009-12-02 | Babcock-Hitachi Kabushiki Kaisha | Method and apparatus for treating discharge gas |
| US8302388B2 (en) | 2006-12-27 | 2012-11-06 | Babcock-Hitachi Kabushiki Kaisha | Exhaust gas treating method and apparatus |
| EP2127728A4 (en) * | 2006-12-27 | 2011-09-21 | Babcock Hitachi Kk | Method and apparatus for treating discharge gas |
| WO2008078721A1 (en) * | 2006-12-27 | 2008-07-03 | Babcock-Hitachi Kabushiki Kaisha | Exhaust gas treating method and apparatus |
| JP2009028655A (en) * | 2007-07-27 | 2009-02-12 | Ihi Corp | Exhaust gas treating method and exhaust gas treatment apparatus |
| JP2009045522A (en) * | 2007-08-15 | 2009-03-05 | Ihi Corp | Exhaust gas treating method and treatment apparatus |
| US7704472B2 (en) | 2008-04-25 | 2010-04-27 | Mitsubishi Heavy Industries, Ltd. | Air pollutant control system and method for removing mercury in flue gas |
| WO2009130815A1 (en) * | 2008-04-25 | 2009-10-29 | 三菱重工業株式会社 | System for treating discharge gas and method of removing mercury from discharge gas |
| KR101229680B1 (en) | 2008-04-25 | 2013-02-04 | 미츠비시 쥬고교 가부시키가이샤 | System for treating discharge gas and method of removing mercury from discharge gas |
| JP2009262081A (en) * | 2008-04-25 | 2009-11-12 | Mitsubishi Heavy Ind Ltd | System for treating discharge gas and method of removing mercury from discharge gas |
| US9221013B2 (en) | 2010-02-04 | 2015-12-29 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US8496894B2 (en) | 2010-02-04 | 2013-07-30 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US9352275B2 (en) | 2010-02-04 | 2016-05-31 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US8372362B2 (en) | 2010-02-04 | 2013-02-12 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US9884286B2 (en) | 2010-02-04 | 2018-02-06 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US11213787B2 (en) | 2010-02-04 | 2022-01-04 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US10427096B2 (en) | 2010-02-04 | 2019-10-01 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US10843130B2 (en) | 2010-02-04 | 2020-11-24 | ADA-ES, Inc. | Method and system for controlling mercury emissions from coal-fired thermal processes |
| US11298657B2 (en) | 2010-10-25 | 2022-04-12 | ADA-ES, Inc. | Hot-side method and system |
| US9657942B2 (en) | 2010-10-25 | 2017-05-23 | ADA-ES, Inc. | Hot-side method and system |
| US10124293B2 (en) | 2010-10-25 | 2018-11-13 | ADA-ES, Inc. | Hot-side method and system |
| US8951487B2 (en) | 2010-10-25 | 2015-02-10 | ADA-ES, Inc. | Hot-side method and system |
| US10730015B2 (en) | 2010-10-25 | 2020-08-04 | ADA-ES, Inc. | Hot-side method and system |
| US8524179B2 (en) | 2010-10-25 | 2013-09-03 | ADA-ES, Inc. | Hot-side method and system |
| US10731095B2 (en) | 2011-05-13 | 2020-08-04 | ADA-ES, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
| US11118127B2 (en) | 2011-05-13 | 2021-09-14 | ADA-ES, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
| US10465137B2 (en) | 2011-05-13 | 2019-11-05 | Ada Es, Inc. | Process to reduce emissions of nitrogen oxides and mercury from coal-fired boilers |
| US10758863B2 (en) | 2012-04-11 | 2020-09-01 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US8883099B2 (en) | 2012-04-11 | 2014-11-11 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US9889405B2 (en) | 2012-04-11 | 2018-02-13 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US11065578B2 (en) | 2012-04-11 | 2021-07-20 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US9409123B2 (en) | 2012-04-11 | 2016-08-09 | ASA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US10159931B2 (en) | 2012-04-11 | 2018-12-25 | ADA-ES, Inc. | Control of wet scrubber oxidation inhibitor and byproduct recovery |
| US10767130B2 (en) | 2012-08-10 | 2020-09-08 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
| US11384304B2 (en) | 2012-08-10 | 2022-07-12 | ADA-ES, Inc. | Method and additive for controlling nitrogen oxide emissions |
| US10589292B2 (en) | 2013-08-16 | 2020-03-17 | ADA-ES, Inc. | Method to reduce mercury, acid gas, and particulate emissions |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3698916B2 (en) | 2005-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000325747A (en) | Process and device for removing mercury in combustion exhaust gas of coal | |
| JP5484689B2 (en) | Exhaust gas treatment system and method for removing mercury in exhaust gas | |
| JP5180097B2 (en) | Exhaust gas treatment method and apparatus | |
| JP2007530256A (en) | Bromine addition to improve mercury removal from flue gas | |
| JPWO2004023040A1 (en) | Smoke treatment system | |
| JPWO2008078722A1 (en) | Exhaust gas treatment method and apparatus | |
| CN104984640A (en) | Comprehensive purification process of glass kiln smoke | |
| KR20000062190A (en) | Mercury removal in utility wet scrubber using a chelating agent | |
| EP1399695B1 (en) | Flue gas purification device for an incinerator | |
| Moretti et al. | Advanced emissions control technologies for coal-fired power plants | |
| JP5284251B2 (en) | Oxy-combustion exhaust gas treatment device and method of operating the exhaust gas treatment device | |
| CN113864789A (en) | Incineration system for treating sulfur-containing, nitrogen-containing and salt-containing waste liquid | |
| CN212188526U (en) | Flue gas treatment system after sludge treatment | |
| JP2012213744A (en) | Apparatus and method for treating exhaust gas and coal upgrading process facility | |
| CN106178877A (en) | A kind of coke oven flue waste gas purification waste heat recovery apparatus and technique | |
| JPH08192029A (en) | Denitrifying and desulfurizing method and device therefor | |
| JP2000325746A (en) | Process and device for removing mercury in exhaust gas | |
| KR101508268B1 (en) | Boiler System for Petro Coke with Dry Scrubber and Dust Collector Equipment | |
| KR101424129B1 (en) | Boiler System for Petro Coke with Wet Scrubber and Dust Collector Equipment | |
| JP5003887B2 (en) | Exhaust gas treatment method and exhaust gas treatment apparatus | |
| CN113663490A (en) | Method for removing sulfur oxides in catalytic cracking regeneration flue gas in cascade manner | |
| JP5299600B2 (en) | Exhaust gas treatment method and exhaust gas treatment apparatus | |
| JP5279062B2 (en) | Combustion exhaust gas treatment method and combustion exhaust gas treatment apparatus | |
| JP2005125261A (en) | Method and device for removing mercury in boiler exhaust gas | |
| JPH01200110A (en) | Method of incinerating low nox |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040617 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050322 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050523 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050705 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050706 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080715 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090715 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100715 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100715 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110715 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120715 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120715 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130715 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |