JPS6388022A - Removal of mercury in exhaust gas - Google Patents
Removal of mercury in exhaust gasInfo
- Publication number
- JPS6388022A JPS6388022A JP61231925A JP23192586A JPS6388022A JP S6388022 A JPS6388022 A JP S6388022A JP 61231925 A JP61231925 A JP 61231925A JP 23192586 A JP23192586 A JP 23192586A JP S6388022 A JPS6388022 A JP S6388022A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- mercury
- cleaning
- gas
- nozzle
- 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
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims description 32
- 229910052753 mercury Inorganic materials 0.000 title claims description 31
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 49
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 20
- 239000000460 chlorine Substances 0.000 claims description 20
- 229910052801 chlorine Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 abstract description 26
- 238000005406 washing Methods 0.000 abstract description 11
- 239000003595 mist Substances 0.000 abstract description 9
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract description 2
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 abstract 2
- 229910001488 sodium perchlorate Inorganic materials 0.000 abstract 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 50
- 239000007788 liquid Substances 0.000 description 13
- 238000007791 dehumidification Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 102220578530 Meprin A subunit alpha_N71L_mutation Human genes 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002731 mercury compounds Chemical class 0.000 description 1
- 229940008718 metallic mercury Drugs 0.000 description 1
- -1 metallic mercury) Chemical compound 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ごみ焼却炉等から排気される排ガス中の水銀
除去方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for removing mercury from exhaust gas exhausted from a garbage incinerator or the like.
［従来の技術］
ごみ焼却炉の排ガス中には、法規制の対象となる塩化水
素（ＨＣｌ）、亜硫酸（ＳＯ２）等のを害ガスが含まれ
ているため、通常、排ガスは乾式法、半乾式法、又は湿
式法により処理されている。[Conventional technology] The exhaust gas from garbage incinerators contains harmful gases such as hydrogen chloride (HCl) and sulfur dioxide (SO2), which are subject to legal regulations. Processed by dry method or wet method.
しかしながら、前記排ガス中には前記ａ害ガスの他に水
銀及びその化合物が含まれており、その含有量が作業環
境基準値（０，０５ＩＩＳ／ｍ’ ）を越える場合があ
るが、上記塩化水素や亜硫酸の除去方法では充分な水銀
の除去が期待できない。これは、次のような理由による
ものと推定される。即ち、排ガス中の水銀の大部分は水
溶性水銀であるにも拘らず、水銀が従来の湿式洗浄工程
で除去できないのは、洗浄液自体に酸化が不充分な還元
性物質を吸収しており、これが洗浄液に吸収された水銀
化合物を還元し、再揮散させるためである。従って、こ
の再揮散を防ぐには洗浄液のもつ還元性を酸化剤によっ
て打消す必要がある。However, the exhaust gas contains mercury and its compounds in addition to the above-mentioned harmful gases, and the content may exceed the working environment standard value (0.05IIS/m'), but the above-mentioned hydrogen chloride Sufficient mercury removal cannot be expected using methods for removing mercury or sulfite. This is presumed to be due to the following reasons. In other words, although most of the mercury in exhaust gas is water-soluble mercury, the reason why mercury cannot be removed by conventional wet cleaning processes is because the cleaning solution itself absorbs reducing substances that are not sufficiently oxidized. This is to reduce and revolatilize the mercury compounds absorbed in the cleaning solution. Therefore, in order to prevent this re-volatilization, it is necessary to use an oxidizing agent to counteract the reducing property of the cleaning liquid.
このようなことから、次亜塩素酸塩（例えば次亜塩素酸
ソーダ）を含む洗浄液に排ガスを接触させて該排ガス中
の水銀を除去する湿式洗煙法が開発されている。この湿
式洗煙法は次のような原理によるものである。まず、次
亜塩素酸ソーダが下記（１）〜（４）式に示すように水
溶性水銀以外の水銀（主に金属水銀）にも作用してＨｇ
Ｏが生成される。For this reason, a wet smoke cleaning method has been developed in which mercury in the exhaust gas is removed by bringing the exhaust gas into contact with a cleaning solution containing hypochlorite (for example, sodium hypochlorite). This wet smoke cleaning method is based on the following principle. First, as shown in equations (1) to (4) below, sodium hypochlorite acts on mercury other than water-soluble mercury (mainly metallic mercury), resulting in Hg
O is generated.
ＮａＣｌ０→ＮａＣノ＋０ −（１）
ＮａＣノＯ＋ＨＣｉ−Ｎａ Ｃノ＋ＨＣＩ！０−（２）
ＨＣＣｌ０ＨＣノ＋Ｏ・・・（３）
Ｈｇ＋０４ＨｇＯ・・・（４）
上記（４）式で生成したＨｇＯは、下記（５）、（６）
反応により洗煙水中に安定化される。NaCl0→NaCノ+0 -(1) NaCノO+HCi-Na C＋HCI! 0-(2)
HCCl0HCノ+O...(3) Hg+04HgO...(4) The HgO generated by the above formula (4) is the following (5), (6)
The reaction stabilizes it in the smoke wash water.
Ｈｇ Ｏ＋２ＨＣＪ！→Ｈｇ ＣＩ２ ＋Ｈ２０・・・
（５）Ｈｇ Ｃｌｚ ＋２Ｎａ ＣＪ！−＊Ｎａ ２
Ｈｇ Ｃｌ４・・・（６）
［発明が解決しようとする問題点］
しかしながら、次亜塩素酸塩を含む洗浄液を使用する湿
式洗煙法においては、ごみ焼却炉で燃焼されるごみ質の
変動等により排気される塩素（ＣＪ！２ ） ６度があ
る基準値を越える場合がある。Hg O+2HCJ! →Hg CI2 +H20...
(5) Hg Clz +2Na CJ! -*Na 2
Hg Cl4... (6) [Problems to be solved by the invention] However, in the wet smoke cleaning method that uses a cleaning solution containing hypochlorite, there are problems such as fluctuations in the quality of the waste burned in the waste incinerator. Chlorine (CJ!2) exhausted by 6 degrees may exceed a certain standard value.
本発明は、上記従来の問題点を解決するためになきれた
もので、水銀含有排ガスを湿式洗煙による次亜塩素酸塩
を含む洗浄液で処理して水銀を除去した後の処理ガス中
に含まれる塩素を効果的に除去し得る排ガス中の水銀除
去方法を提供しようとするものである。The present invention was developed to solve the above-mentioned conventional problems.The present invention was developed to solve the above-mentioned conventional problems. The present invention aims to provide a method for removing mercury from exhaust gas that can effectively remove the chlorine contained therein.
［問題点を解決するための手段］
本発明は、水銀含有排ガスを、湿式洗煙による次亜塩素
酸塩を含む洗浄液に接触させて水銀を除去する方法にお
いて、塩素と反応する還元剤が添加された冷却水に前記
洗浄後のガスを接触させて該ガス中の塩素を除去せしめ
ることを特徴とする排ガス中の水銀除去方法である。[Means for Solving the Problems] The present invention provides a method for removing mercury by bringing mercury-containing exhaust gas into contact with a cleaning solution containing hypochlorite by wet smoke washing, in which a reducing agent that reacts with chlorine is added. The method for removing mercury from exhaust gas is characterized in that the cleaned cooling water is brought into contact with the cleaned gas to remove chlorine from the gas.
以下、本発明を第１図を参照して詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to FIG.
第１図は、単一の洗浄塔からなる湿式洗煙装置の一形態
を示す概略図であり、図中の１は洗浄塔である。この洗
浄塔１の底部には、次亜塩素酸塩（例えばＮａＣ１７０
）を含む力性ソーダ水溶液からなる洗浄液２が収容され
ている。前記洗浄塔１の下部付近には、排ガスが供給さ
れる予冷部３が設けられており、該予冷部２内には前記
洗浄液を噴霧するための第１．のノズル４が配置されて
いる。 。FIG. 1 is a schematic diagram showing one form of a wet smoke scrubbing apparatus consisting of a single cleaning tower, and 1 in the figure is the cleaning tower. At the bottom of this washing tower 1, hypochlorite (e.g. NaC170
) A cleaning liquid 2 consisting of an aqueous solution of sodium hydroxide is contained therein. A pre-cooling section 3 to which exhaust gas is supplied is provided near the bottom of the cleaning tower 1, and a first section 3 for spraying the cleaning liquid is provided inside the pre-cooling section 2. Nozzles 4 are arranged. .
前記洗浄塔１とノズル４を連結する配管には、次亜塩素
酸塩（例えばＮａＣ）Ｏ）が供給される。Hypochlorite (for example, NaC) is supplied to the pipe connecting the cleaning tower 1 and the nozzle 4.
前記洗浄塔１の中間付近には、前記洗浄液を噴霧するた
めの第２のノズル５を有する気液接触洗浄部６が配置さ
れており、かつ前記洗浄塔１と第２のノズル５を連結す
る配管には次亜塩素酸塩（例えばＮａＣ，１’０）が供
給される。前記洗浄部６上刃の洗浄塔１内には、第１の
ミストセパレータ７が配置されている。このミストセパ
レータ７上方の洗浄塔１内には、冷却水を噴霧するため
の第３のノズル８を有する減湿冷却部９が配置されてい
る。この減湿冷却部９の処理済冷却水は冷却水貯槽ｌＯ
に導入され、更に冷却塔１１に供給される。この冷却塔
１１の冷却水は、前記第３のノズル８に供給される。こ
の冷却塔１１と第３のノズル８の間の配管には、塩素と
反応する還元剤が供給される。A gas-liquid contact cleaning section 6 having a second nozzle 5 for spraying the cleaning liquid is arranged near the middle of the cleaning tower 1, and connects the cleaning tower 1 and the second nozzle 5. The piping is supplied with hypochlorite (eg NaC, 1'0). A first mist separator 7 is disposed inside the cleaning tower 1 on the upper blade of the cleaning section 6 . A dehumidifying cooling section 9 having a third nozzle 8 for spraying cooling water is arranged in the cleaning tower 1 above the mist separator 7. The treated cooling water of this dehumidification cooling section 9 is stored in a cooling water storage tank lO.
and further supplied to the cooling tower 11. The cooling water of this cooling tower 11 is supplied to the third nozzle 8. A reducing agent that reacts with chlorine is supplied to the pipe between the cooling tower 11 and the third nozzle 8 .
なお、図中の１２は前記減湿冷却部９１方の洗浄塔１内
に配置された第２のミストセパレータである。Note that 12 in the figure is a second mist separator arranged in the cleaning tower 1 on the side of the dehumidification cooling section 91.
次に、上述した湿式洗煙装置を用いて本発明の水銀除去
方法を説明すると、まず、水銀含を排ガスを予冷部３に
供給し、この予冷部３で第１のノズル４からＮａＣＪＯ
が添加された洗浄液を噴霧することにより排ガスを冷却
した後、洗浄塔１内に供給する。洗浄塔１内の冷却され
た排ガスは洗浄部６に導入され、ここで第２のノズル５
からＮａ ＣＩＯが添加された洗浄液を噴霧することに
より前述した（１）〜（６）式の反応が進行して排ガス
中の水銀が洗浄液中に安定化される。洗浄部６で処理さ
れたガスは、第１のミストセパレータ７でミストが除去
され、更に減湿冷却部９に移行される。Next, to explain the mercury removal method of the present invention using the above-mentioned wet smoke cleaning device, first, mercury-containing exhaust gas is supplied to the pre-cooling section 3, and in this pre-cooling section 3, NaCJO is removed from the first nozzle 4.
After the exhaust gas is cooled by spraying the cleaning liquid to which is added, it is supplied into the cleaning tower 1. The cooled exhaust gas in the cleaning tower 1 is introduced into the cleaning section 6, where it is passed through the second nozzle 5.
By spraying the cleaning liquid to which Na CIO is added, the reactions of formulas (1) to (6) described above proceed, and the mercury in the exhaust gas is stabilized in the cleaning liquid. The gas processed in the cleaning section 6 has its mist removed by a first mist separator 7, and is further transferred to the dehumidification cooling section 9.
この減湿冷却部９では、第３のノズル８から塩素と反応
する還元剤を含む冷却水が噴霧され、処理ガスの冷却が
なされると共に該ガス中の塩素が還元されて除去される
。冷却等がなされた処理ガスは、第２のミストセパレー
タ１２でミスト除去が行われた後、洗浄塔１上部から排
出される。In this dehumidification cooling section 9, cooling water containing a reducing agent that reacts with chlorine is sprayed from the third nozzle 8, thereby cooling the processing gas and reducing and removing chlorine in the gas. The cooled processing gas is discharged from the upper part of the cleaning tower 1 after the mist is removed by the second mist separator 12 .
上記減湿冷却部の冷却水に添加される還元剤としては、
塩素ガスと反応するものであればいかなるものでよく、
具体的には亜硫酸塩又はチ°オ硫酸塩等を挙げることが
できる。この還元剤の添加量は、処理ガス中に含まれる
塩素に対して当量以上とすればよい。減湿冷却部での液
ガス比は、一般的には２〜６１！／ｍ”の範囲にあるた
め、還元剤の添加量はかかる点を考慮して決定すること
が望ましい。また、還元剤が添加された減湿冷却水のｐ
Ｈは、塩素に対する還元性が最も良好となる範囲に設定
すればよい。The reducing agent added to the cooling water in the dehumidification cooling section is as follows:
Any material that reacts with chlorine gas may be used.
Specific examples include sulfites and thiosulfates. The amount of the reducing agent added may be equal to or greater than the amount of chlorine contained in the process gas. The liquid-gas ratio in the dehumidifying cooling section is generally 2 to 61! /m'' range, so it is desirable to decide the amount of reducing agent to be added taking this point into consideration.Also, the
H may be set within a range that provides the best reducibility to chlorine.
［作用］
本発明は、水銀含有排ガスを、湿式洗煙による次亜塩素
酸塩を含む洗浄液に接触させて水銀を除去した後の処理
ガスを塩素と反応する還元剤が添加された冷却水に接触
させることによって、処理ガス中の塩素を除去でき、あ
る基準値以上の塩素を含有する処理ガスの排出を防止で
きる。[Function] The present invention brings the mercury-containing exhaust gas into contact with a cleaning solution containing hypochlorite by wet smoke washing to remove mercury, and then converts the treated gas into cooling water to which a reducing agent that reacts with chlorine is added. Through contact, chlorine in the processing gas can be removed, and discharge of processing gas containing chlorine exceeding a certain standard value can be prevented.
［発明の実施例］ 以下、本発明の実施例を詳細に説明する。[Embodiments of the invention] Examples of the present invention will be described in detail below.
まず、プロパン燃焼炉に水銀、塩化水素及び蒸気を吹き
込み、温度８００℃の模擬排ガスを作製した。つづいて
、この排ガスを熱交換器で３００℃まで冷却した後、湿
式洗煙装置の予冷部に供給し、ここで噴霧された洗浄液
により８０℃程度まで急冷した。ひきつづき、予冷部の
排ガスを該予冷部と連通ずる洗浄塔内に導入し、冷却さ
れた排ガスを該洗浄塔の洗浄部で噴霧された洗浄液と接
触させて水銀の除去を行なった。次いで、洗？ｐ部で処
理された下記表に示す量の塩素を含む処理ガスを該洗浄
塔の減湿冷却部に移行させ、この減湿冷却部において該
処理ガス中の塩素に対して同表に示すモル比率で還元剤
が添加された冷却水（水道水）を噴霧して、処理ガスの
冷却及び該ガス中の塩素の還元、除去を行なった後、大
気に排出した。なお、かかる排ガス処理工程での条件は
以下の通りである。First, mercury, hydrogen chloride, and steam were blown into a propane combustion furnace to create a simulated exhaust gas at a temperature of 800°C. Subsequently, this exhaust gas was cooled to 300° C. in a heat exchanger, and then supplied to a pre-cooling section of a wet smoke scrubber, where it was rapidly cooled to about 80° C. by the sprayed cleaning liquid. Subsequently, the exhaust gas from the precooling section was introduced into a cleaning tower communicating with the precooling section, and the cooled exhaust gas was brought into contact with the cleaning liquid sprayed in the cleaning section of the cleaning tower to remove mercury. Next, wash? The treated gas containing chlorine in the amount shown in the table below, which has been treated in part p, is transferred to the dehumidification cooling section of the cleaning tower, and in this dehumidification cooling section, the molar amount shown in the table is calculated based on the amount of chlorine in the treated gas. Cooling water (tap water) to which a reducing agent was added at a certain ratio was sprayed to cool the treated gas and reduce and remove chlorine in the gas, which was then discharged into the atmosphere. Note that the conditions in this exhaust gas treatment step are as follows.
■排ガス童；４５ｍ３／ｈｒ
■洗浄液；ＮａＣｌ０が添加された力性ソーダ水溶液
■洗浄部での液ガス比；３．ｌ？／７７Ｚ３■洗浄後の
処理ガス温度；７２℃
■還元剤；亜硫酸ナトリウム
■減湿冷却部での液ガス、比；３ノ／ｍ３■冷却後の処
理ガス温度； ６０”Ｃ
しかして、減湿冷却部で冷却処理等がなされた処理ガス
中の塩素（ＣＩ！２ ）濃度を調べた。その結果を同表
に併記した。なお、同表に示す各洗浄部処理ガスは、い
ずれも洗浄部で水銀が９４％以上（０，５Ｂ／Ｎ７１Ｌ
’ −０，０３＋ｙ９／Ｎ７ＩＬ’ ）除去さレテいた
。■Exhaust gas: 45m3/hr ■Cleaning liquid: NaCl0-added aqueous sodium hydroxide solution ■Liquid-gas ratio in cleaning section;3. l? /77Z3■ Processing gas temperature after cleaning; 72℃ ■Reducing agent: Sodium sulfite ■Liquid gas in dehumidification cooling section, ratio: 3 no/m3 ■Processing gas temperature after cooling; 60"C Therefore, dehumidification The concentration of chlorine (CI!2) in the processing gas that was subjected to cooling treatment in the cooling section was investigated.The results are also listed in the same table.In addition, each cleaning section processing gas shown in the same table is and mercury is 94% or more (0.5B/N71L
'-0,03+y9/N7IL') was removed.
表
上記表から明らかなように、本実施例では水銀除去後の
処理ガスを還元剤が添加された冷却水で処理することに
より塩素量を著しく低減した処理ガスが得られることが
わかる。Table As is clear from the above table, in this example, by treating the treated gas after mercury removal with cooling water to which a reducing agent has been added, a treated gas with a significantly reduced amount of chlorine can be obtained.
［発明の効果］
以上詳述した如く本発明によれば、ごみ焼却炉等からの
水銀含を排ガスを湿式洗煙による次亜塩素酸塩を含む洗
浄液で処理して水銀を除去する際、該焼却炉中のごみ質
の変動により処理ガス中にある基準値以上の塩素が含有
するようになっても、該塩素を効果的に除去でき、ひい
ては環境汚染を防止し得る排ガス中の水銀除去方法を提
供できる。[Effects of the Invention] As detailed above, according to the present invention, when mercury-containing exhaust gas from a garbage incinerator or the like is treated with a cleaning solution containing hypochlorite by wet smoke washing, mercury is removed. A method for removing mercury from exhaust gas that can effectively remove chlorine even if the treated gas contains more than a standard value due to changes in the quality of waste in an incinerator, and can further prevent environmental pollution. can be provided.
８ｔ、本発明の排ガス中の水銀除去法に使用される湿式
洗煙装置の一形態を示す概略図である。
１・・・洗浄塔、２・・・洗浄液、３・・・予冷部、４
．５．８・・・ノズル、６・・・洗浄部、９・・・減湿
冷却部、１１・・・冷却塔。8t is a schematic diagram showing one form of a wet smoke scrubbing device used in the method for removing mercury from exhaust gas of the present invention. 1... Washing tower, 2... Cleaning liquid, 3... Pre-cooling section, 4
．． 5.8... Nozzle, 6... Washing section, 9... Dehumidification cooling section, 11... Cooling tower.
Claims (1)
洗浄液に接触させて水銀を除去する方法において、塩素
と反応する還元剤が添加された冷却水に前記洗浄後のガ
スを接触させて該ガス中の塩素を除去せしめることを特
徴とする排ガス中の水銀除去方法。In a method of removing mercury by bringing mercury-containing exhaust gas into contact with a cleaning solution containing hypochlorite by wet smoke cleaning, the cleaning gas is brought into contact with cooling water to which a reducing agent that reacts with chlorine is added. A method for removing mercury from exhaust gas, which comprises removing chlorine from the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61231925A JPS6388022A (en) | 1986-09-30 | 1986-09-30 | Removal of mercury in exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61231925A JPS6388022A (en) | 1986-09-30 | 1986-09-30 | Removal of mercury in exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6388022A true JPS6388022A (en) | 1988-04-19 |
Family
ID=16931211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61231925A Pending JPS6388022A (en) | 1986-09-30 | 1986-09-30 | Removal of mercury in exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6388022A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0356123A (en) * | 1989-07-25 | 1991-03-11 | Nkk Corp | Removal of mercury and nox in gas |
| JP2013007356A (en) * | 2011-06-27 | 2013-01-10 | Kobelco Eco-Solutions Co Ltd | Power generation system and power generation method |
| JP2013007547A (en) * | 2011-06-27 | 2013-01-10 | Kobelco Eco-Solutions Co Ltd | Power generation system and method of generating power |
-
1986
- 1986-09-30 JP JP61231925A patent/JPS6388022A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0356123A (en) * | 1989-07-25 | 1991-03-11 | Nkk Corp | Removal of mercury and nox in gas |
| JP2013007356A (en) * | 2011-06-27 | 2013-01-10 | Kobelco Eco-Solutions Co Ltd | Power generation system and power generation method |
| JP2013007547A (en) * | 2011-06-27 | 2013-01-10 | Kobelco Eco-Solutions Co Ltd | Power generation system and method of generating power |
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