JPH0732862B2 - Operating method of filtration dust collection type exhaust gas treatment equipment - Google Patents
Operating method of filtration dust collection type exhaust gas treatment equipmentInfo
- Publication number
- JPH0732862B2 JPH0732862B2 JP1116868A JP11686889A JPH0732862B2 JP H0732862 B2 JPH0732862 B2 JP H0732862B2 JP 1116868 A JP1116868 A JP 1116868A JP 11686889 A JP11686889 A JP 11686889A JP H0732862 B2 JPH0732862 B2 JP H0732862B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- cacl
- dust
- gas treatment
- dust collection
- 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.)
- Expired - Lifetime
Links
- 239000000428 dust Substances 0.000 title claims description 34
- 238000001914 filtration Methods 0.000 title claims 2
- 238000011017 operating method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 55
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 17
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 17
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 17
- 239000004744 fabric Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000002378 acidificating effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910052815 sulfur oxide Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 150000002013 dioxins Chemical class 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、濾過集塵式排ガス処理装置を用いて、塩化
水素ガスや硫黄酸化物のような酸性ガスを含む燃焼排ガ
スを処理する方法に関し、さらに詳しくは、これら含有
物質の除去効果を調整するとともに、濾布の目詰まりを
防止する新規運転方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for treating a combustion exhaust gas containing an acidic gas such as hydrogen chloride gas or sulfur oxide by using a filter dust collecting type exhaust gas treatment apparatus. More specifically, the present invention relates to a novel operation method for adjusting the removal effect of these contained substances and preventing clogging of the filter cloth.
［従来技術およびその問題点］ 濾過集塵式排ガス処理装置たとえばバグフィルタを用い
て上記のような燃焼排ガスを処理する場合、排ガス中の
重金属やダイオキシンの除去は結果的に達成されるもの
であり、また排ガスの温度調節は専ら同装置の安全運転
および排ガス中の酸性ガスの除去を目的として行われて
いた。[Prior Art and its Problems] When the above combustion exhaust gas is treated by using a filter dust collecting type exhaust gas treatment apparatus such as a bag filter, removal of heavy metals and dioxins in the exhaust gas is eventually achieved. Moreover, the temperature control of the exhaust gas has been performed exclusively for the purpose of safe operation of the device and removal of acid gas in the exhaust gas.
しかし、重金属やダイオキシンと、塩化水素ガスや硫黄
酸化物のような酸性ガスとでは、各々の除去形態が全く
異なり、前者の除去効果は、第４図に示すように排ガス
の温度に大きく依存する一方、後者の除去効果は、第３
図に示すように酸吸着剤の添加量にも直接大きく影響を
受ける。However, heavy metals and dioxins and acidic gases such as hydrogen chloride gas and sulfur oxides have completely different removal forms, and the removal effect of the former largely depends on the temperature of the exhaust gas as shown in FIG. On the other hand, the latter removal effect is
As shown in the figure, the addition amount of the acid adsorbent is also directly affected.
ところで、上記のようにHClガスを含む排ガスを濾過集
塵式排ガス処理装置を用いて処理するには、通常、同装
置の前流側で排ガスに脱酸剤として消石灰Ca（OH）２を
添加している。しかし、HClとCa（OH）２の反応によっ
て生じたCaCl2は、特に低温において著しい潮解性を示
すために、運転停止時や運転準備中などの低温時にCaCl
2が濾布に付着して濾布が目詰まりを起こすという問題
があった。By the way, in order to treat the exhaust gas containing HCl gas by using the filter dust collecting type exhaust gas treatment device as described above, usually, slaked lime Ca (OH) 2 is added as a deoxidizing agent to the exhaust gas on the upstream side of the device. is doing. However, CaCl 2 generated by the reaction between HCl and Ca (OH) 2 exhibits remarkable deliquescent properties, especially at low temperatures, so CaCl 2 is used at low temperatures such as when operation is stopped or during operation preparation.
There was a problem that 2 was attached to the filter cloth and the filter cloth was clogged.
この発明は、上記の如き実情に鑑み、塩化水素ガスや硫
黄酸化物のような酸性ガスの除去効果を効率的に調整す
るとともに、集塵ダスト中のCaCl2の含有量を低く抑制
することによって、潮解性CaCl2が濾布に付着して目詰
まりを起こすのを回避し、以って排ガス処理装置を支障
なく運転する方法を提供することを目的とする。In view of the above situation, the present invention efficiently adjusts the effect of removing acidic gases such as hydrogen chloride gas and sulfur oxides, and suppresses the content of CaCl 2 in the collected dust to be low. It is an object of the present invention to provide a method for preventing deliquescent CaCl 2 from adhering to a filter cloth and causing clogging, thereby operating the exhaust gas treatment device without any trouble.
［問題点の解決手段］ この発明による濾過集塵式排ガス処理装置の運転方法
は、処理すべき排ガスにCa（OH）２を添加して排ガス中
のHClガスをCaCl2として濾過集塵式排ガス処理装置で除
去するに当たり、集塵ダスト中のCaCl2の含有量を検知
し、CaCl2の含有量にしたがってCa（OH）２の添加量を
調節することによって、または埋火時にCa（OH）２の添
加量を増加させかつ付着粉塵の払い落とし間隔を密にす
ることによって、集塵ダスト中のCaCl2の含有量を低く
抑制することを特徴とする。[Means for Solving Problems] A method for operating a filter dust collecting type exhaust gas treatment apparatus according to the present invention is a filter dust collecting type exhaust gas in which Ca (OH) 2 is added to exhaust gas to be treated and HCl gas in the exhaust gas is changed to CaCl 2. When removing it with the treatment equipment, the content of CaCl 2 in the collected dust is detected, and the amount of Ca (OH) 2 added is adjusted according to the content of CaCl 2 , or Ca (OH) 2 at the time of burial. It is characterized in that the content of CaCl 2 in the collected dust is suppressed to a low level by increasing the amount of addition of 2 and making the interval for removing the adhered dust close.
脱酸剤としては消石灰Ca（OH）２が一般的であるが、必
ずしもこれに限定されない。Slaked lime Ca (OH) 2 is generally used as the deoxidizing agent, but is not limited thereto.
本発明において、集塵ダスト中のCaCl2の含有量は、集
塵ダストを一部サンプリングして水に溶解させ、溶液中
のCa濃度を測定することよって検知される。そして、排
ガスへのCa（OH）２の添加量および付着粉塵の払い落と
し間隔の調節は、この検知信号によってCa（OH）２の供
給バルブの開閉および払い落とし用タイマーを制御する
ことによって行われる。In the present invention, the content of CaCl 2 in the collected dust is detected by sampling a part of the collected dust, dissolving it in water, and measuring the Ca concentration in the solution. Then, the amount of Ca (OH) 2 added to the exhaust gas and the interval for removing the adhering dust are adjusted by controlling the opening / closing of the Ca (OH) 2 supply valve and the timer for removing by the detection signal. .
また、埋火時には排ガス中のHCl濃度が高くなるので、
埋火操作と同時にCa（OH）２の添加量を増加させかつ付
着粉塵の払い落とし間隔を密にする。その結果、集塵ダ
スト中の潮解性CaCl2の含有量が低く抑制せられ、CaCl2
が濾布に付着して目詰まりをおこすことが防止される。Also, since the HCl concentration in the exhaust gas becomes high when the fire is buried,
Increase the amount of Ca (OH) 2 added at the same time as the blasting operation and close the interval for removing the adhered dust. As a result, the content of deliquescent CaCl 2 in the collected dust was suppressed to a low level, and CaCl 2
Are prevented from adhering to the filter cloth and causing clogging.
［実施例］ つぎに、図示の実施例によりこの発明を具体的に説明す
る。[Examples] Next, the present invention will be described in detail with reference to the illustrated examples.
実施例１（参考例） 添付の第１図において、重金属やダイオキシン、さらに
は塩化水素ガスや硫黄酸化物のような酸性ガスを含む燃
焼排ガスは、まず減温塔（１）に通される。同塔（１）
の頂部にはバルブ（２）を有する給水管（３）が配さ
れ、同管（３）から水が噴射されている。バルブ（２）
の開閉は、後述する処理ガスの温度を温度検知器（４）
によって検知して得られた検知信号によって調節され
る。こうして、水の供給量を制御することによって、排
ガスは減温塔（１）を通過する間に所要の温度に調節さ
れる。Example 1 (Reference Example) In the attached FIG. 1, combustion exhaust gas containing heavy metals, dioxins, and acid gases such as hydrogen chloride gas and sulfur oxides is first passed through a temperature reducing tower (1). Same tower (1)
A water supply pipe (3) having a valve (2) is arranged at the top of the pipe, and water is injected from the pipe (3). Valve (2)
The temperature of the processing gas, which will be described later, is opened and closed by the temperature detector (4).
It is adjusted by the detection signal obtained by detecting by. Thus, by controlling the amount of water supplied, the exhaust gas is adjusted to the required temperature while passing through the temperature reducing tower (1).
減温塔（１）の後流側には、バルブ（５）を有する脱酸
剤供給管（６）が配され、同管（６）によって排ガスに
脱酸剤としてCa（OH）２が添加されている。Ca（OH）２
の添加量の調節も、後述する処理ガスのHCl濃度をHCl検
知器（７）によって検知し、得られた検知信号によって
バルブ（５）の開閉を制御することによって行われる。
こうして、排ガスに所要量のCa（OH）２を添加すること
によって、排ガス中のHClガスはCaCl2になされ、その他
の酸性ガスもCa塩になされる。A deoxidizer supply pipe (6) having a valve (5) is arranged on the downstream side of the temperature reduction tower (1), and Ca (OH) 2 as a deoxidizer is added to the exhaust gas through the pipe (6). Has been done. Ca (OH) 2
The amount of HCl added is also adjusted by detecting the HCl concentration of the processing gas described later by the HCl detector (7) and controlling the opening / closing of the valve (5) by the obtained detection signal.
Thus, by adding a required amount of Ca (OH) 2 to the exhaust gas, the HCl gas in the exhaust gas becomes CaCl 2 and the other acidic gases also become Ca salts.
温度が調節されかつCa（OH）２が添加された排ガスは、
ついでバグフィルタ（８）に通されて集塵処理される。
この処理ガスの温度およびHCl濃度は、上述のごとく各
検知器（４）（７）によってそれぞれ検知され、得られ
た検知信号によってバルブ（２）およびバルブ（５）の
開閉が制御される。The exhaust gas whose temperature is adjusted and Ca (OH) 2 is added is
Then, it is passed through a bag filter (8) for dust collection.
The temperature and the HCl concentration of the processing gas are respectively detected by the detectors (4) and (7) as described above, and the opening and closing of the valve (2) and the valve (5) are controlled by the obtained detection signals.
こうして、処理すべき排ガスの温度を減温塔（１）にお
ける水洗によって調節することによって、バグフィルタ
（８）による重金属およびダイオキシンの除去効果が調
整せられるとともに、排ガスへのCa（OH）２の添加量を
調節することによって、排ガス中の塩化水素ガスや硫黄
酸化物のような酸性ガスの除去効果が調整せられる。Thus, by adjusting the temperature of the exhaust gas to be treated by washing with water in the temperature reducing tower (1), the effect of removing heavy metals and dioxins by the bag filter (8) can be adjusted, and Ca (OH) 2 in the exhaust gas can be adjusted. By adjusting the addition amount, the effect of removing acidic gas such as hydrogen chloride gas and sulfur oxides in the exhaust gas can be adjusted.
実施例２ 添付の第２図において、バグフィルタ（18）の前流側
に、バルブ（15）を有する脱酸剤供給管（16）が配さ
れ、同管（16）によって排ガスに脱酸剤としてCa（OH）
２が添加されている。こうして排ガスに所要量のCa（O
H）２を添加することによって、排ガス中のHClガスはCa
Cl2になされる。Example 2 In FIG. 2 attached, a deoxidizing agent supply pipe (16) having a valve (15) is arranged on the upstream side of a bag filter (18), and the deoxidizing agent is supplied to exhaust gas by the same pipe (16). As Ca (OH)
2 has been added. Thus, the required amount of Ca (O
H) 2 is added so that HCl gas in the exhaust gas becomes Ca
Done to Cl 2 .
Ca（OH）２が添加された排ガスは、ついでバグフィルタ
（18）に通されて集塵処理される。バグフィルタ（18）
には付着粉塵の払い落とし装置が設けられている。同装
置は逆気流、揺動、音波などの手段によって濾布から粉
塵を離脱させるものである。この払い落とし装置にはタ
イマー（10）が備え付けられ、同装置はタイマー（10）
によって間欠的に作動させられる。The exhaust gas to which Ca (OH) 2 has been added is then passed through a bag filter (18) for dust collection. Bag filters (18)
Is equipped with a device for removing adhered dust. The device removes dust from the filter cloth by means of reverse air flow, rocking, and sound waves. This expulsion device is equipped with a timer (10), which is a timer (10).
It is operated intermittently by.
バグフィルタ（18）によって集塵されたダストは、一部
サンプリングされて水に溶解され、検知器（９）によっ
て溶液中のCa濃度を測定することによって、集塵ダスト
中のCaCl2の含有量が検知される。この検知信号によっ
てCa（OH）２の供給バルブ（15）の開閉が制御される。
こうして、集塵ダスト中のCaCl2の含有量にしたがってC
a（OH）２の添加量が調節される。その結果、集塵ダス
ト中の潮解性CaCl2の含有量が低く抑制せられ、CaCl2が
濾布に付着して目詰まりをおこすことが防止される。The dust collected by the bag filter (18) is partially sampled and dissolved in water, and the Ca concentration in the solution is measured by the detector (9) to determine the CaCl 2 content in the dust. Is detected. The detection signal controls the opening and closing of the Ca (OH) 2 supply valve (15).
Thus, according to the content of CaCl 2 in the collected dust, C
The amount of a (OH) 2 added is adjusted. As a result, the content of deliquescent CaCl 2 in the collected dust is suppressed low, and CaCl 2 is prevented from adhering to the filter cloth and causing clogging.
また、この検知信号によって払い落とし装置のタイマー
（10）も制御される。The detection signal also controls the timer (10) of the scrubbing device.
実施例３ 第２図の構成において、埋火時には排ガス中のHCl濃度
が高くなるので、埋火操作と同時にCa（OH）２の添加量
が増加させられ、かつ付着粉塵の払い落とし間隔が密に
なされる。Ca（OH）２の添加量および付着粉塵の払い落
とし間隔は、バルブ（15）およびタイマー（10）の各設
定値を変更することによって調節される。Example 3 In the configuration of FIG. 2, since the HCl concentration in the exhaust gas becomes high at the time of burial, the Ca (OH) 2 addition amount is increased at the same time as the blasting operation, and the dust removal interval of the adhered dust is tight. Done The amount of Ca (OH) 2 added and the interval for removing the adhered dust are adjusted by changing the set values of the valve (15) and the timer (10).
その結果、集塵ダスト中の潮解性CaCl2の含有量が低く
抑制せられ、CaCl2が濾布に付着して目詰まりをおこす
ことが防止される。その他の構成は、実施例２のものと
同じである。As a result, the content of deliquescent CaCl 2 in the collected dust is suppressed low, and CaCl 2 is prevented from adhering to the filter cloth and causing clogging. Other configurations are the same as those of the second embodiment.
［発明の効果］ この発明による濾過集塵式排ガス処理装置の運転方法
は、以上の通り構成されているので、排ガス中の塩化水
素ガスや硫黄酸化物のような酸性ガスの除去効果を効率
的に調整することができるとともに、集塵ダスト中のCa
Cl2の含有量を低く抑制することによって、潮解性CaCl2
が濾布に付着して目詰まりを起こすのを効果的に回避す
ることができ、以って排ガス処理装置を支障なく運転す
ることができる。[Effect of the Invention] Since the operating method of the filter dust collecting type exhaust gas treatment apparatus according to the present invention is configured as described above, it is possible to efficiently remove the effect of removing acidic gas such as hydrogen chloride gas and sulfur oxides in the exhaust gas. Can be adjusted to
By controlling the Cl 2 content to a low level, deliquescent CaCl 2
It is possible to effectively avoid clogging of the filter cloth with the filter cloth, and thus the exhaust gas treatment device can be operated without any trouble.
第１図はこの発明の参考例をフローシートであり、第２
図はこの発明の実施例を示すフローシートであり、第３
図は消石灰供給量と酸濃度の関係を示すグラフであり、
第４図は温度とダイオキシン濃度の関係を示すグラフで
ある。FIG. 1 is a flow sheet of a reference example of the present invention.
FIG. 3 is a flow sheet showing an embodiment of the present invention.
The figure is a graph showing the relationship between slaked lime supply and acid concentration,
FIG. 4 is a graph showing the relationship between temperature and dioxin concentration.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 53/34 ＺＡＢ 53/50 53/81 Ｂ０１Ｄ 53/34 ＺＡＢ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location B01D 53/34 ZAB 53/50 53/81 B01D 53/34 ZAB
Claims (1)
排ガス中のHClガスをCaCl2として濾過集塵式排ガス処理
装置で除去するに当たり、集塵ダスト中のCaCl2の含有
量を検知し、CaCl2の含有量にしたがってCa（OH）２の
添加量を調節することによって、または埋火時にCa（O
H）２の添加量を増加させかつ付着粉塵の払い落とし間
隔を密にすることによって、集塵ダスト中のCaCl2の含
有量を低く抑制することを特徴とする、濾過集塵式排ガ
ス処理装置の運転方法。1. When Ca (OH) 2 is added to the exhaust gas to be treated and HCl gas in the exhaust gas is removed as CaCl 2 by a filter dust collecting type exhaust gas treatment apparatus, the content of CaCl 2 in the dust collecting dust By adjusting the amount of Ca (OH) 2 added according to the CaCl 2 content, or when Ca (O)
H) A filtration dust collection type exhaust gas treatment device characterized by suppressing the content of CaCl 2 in the dust collection to a low level by increasing the amount of addition of 2 and making the intervals for removing the adhered dust close. Driving method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116868A JPH0732862B2 (en) | 1989-05-09 | 1989-05-09 | Operating method of filtration dust collection type exhaust gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116868A JPH0732862B2 (en) | 1989-05-09 | 1989-05-09 | Operating method of filtration dust collection type exhaust gas treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02298316A JPH02298316A (en) | 1990-12-10 |
| JPH0732862B2 true JPH0732862B2 (en) | 1995-04-12 |
Family
ID=14697620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1116868A Expired - Lifetime JPH0732862B2 (en) | 1989-05-09 | 1989-05-09 | Operating method of filtration dust collection type exhaust gas treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732862B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5500195A (en) * | 1992-11-13 | 1996-03-19 | Foster Wheeler Energy Corporation | Method for reducing gaseous emission of halogen compounds in a fluidized bed reactor |
| JP2813543B2 (en) * | 1994-02-28 | 1998-10-22 | 古河電気工業株式会社 | Waste gas treatment equipment for glass synthesis equipment for optical fibers |
| EP0930091B1 (en) * | 1997-04-25 | 2004-06-30 | JFE Engineering Corporation | Method of treating exhaust gas |
| AU2003266504A1 (en) * | 2002-09-09 | 2004-03-29 | Babcock-Hitachi Kabushiki Kaisha | Exhaust smoke-processing system |
| JP2013017956A (en) * | 2011-07-12 | 2013-01-31 | Takuma Co Ltd | Method for controlling additive rate of chelating agent to fly ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210418A (en) * | 1975-07-10 | 1977-01-26 | Katayama Chem Works Co Ltd | Controlling agent against adhesive organisms living in the sea |
-
1989
- 1989-05-09 JP JP1116868A patent/JPH0732862B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02298316A (en) | 1990-12-10 |
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