JPH09173742A - Two-stage dust collection equipment and dust removing method of exhaust gas with two-stage dust collection equipment - Google Patents
Two-stage dust collection equipment and dust removing method of exhaust gas with two-stage dust collection equipmentInfo
- Publication number
- JPH09173742A JPH09173742A JP8279762A JP27976296A JPH09173742A JP H09173742 A JPH09173742 A JP H09173742A JP 8279762 A JP8279762 A JP 8279762A JP 27976296 A JP27976296 A JP 27976296A JP H09173742 A JPH09173742 A JP H09173742A
- Authority
- JP
- Japan
- Prior art keywords
- stage
- exhaust gas
- dust collecting
- chemical
- fly ash
- 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
- 239000000428 dust Substances 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 16
- 239000000126 substance Substances 0.000 claims abstract description 82
- 239000010881 fly ash Substances 0.000 claims abstract description 81
- 239000004744 fabric Substances 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 64
- 239000003814 drug Substances 0.000 claims description 40
- 229940079593 drug Drugs 0.000 claims description 32
- 150000001875 compounds Chemical class 0.000 claims description 21
- 239000007787 solid Substances 0.000 claims description 20
- 239000006185 dispersion Substances 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 8
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 claims description 3
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 118
- 238000011084 recovery Methods 0.000 description 18
- 238000005192 partition Methods 0.000 description 9
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 8
- 239000000920 calcium hydroxide Substances 0.000 description 8
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 8
- 235000011116 calcium hydroxide Nutrition 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 7
- 239000012752 auxiliary agent Substances 0.000 description 7
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 7
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000011575 calcium Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- -1 for example Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000002547 new drug Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ごみを含む産
業廃棄物を焼却した際に発生する排ガスを処理する排ガ
ス処理設備おいて、アルカリ性薬剤を排ガス中に吹き込
んで酸性ガスと反応させて生成された固形化合物や煤
塵、重金属類を濾布で回収する２段式集塵設備および２
段式集塵設備による排ガスの除塵方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment facility for treating exhaust gas generated when incinerating industrial wastes including municipal waste, and is produced by blowing an alkaline chemical into the exhaust gas and reacting it with acid gas. 2-stage dust collection equipment for collecting the collected solid compounds, soot dust, and heavy metals with a filter cloth and 2
The present invention relates to a method for removing dust from exhaust gas by using a stepped dust collecting facility.
【０００２】[0002]
【従来の技術】従来、２段式集塵装置の一例である２段
式バグフィルタは、それぞれ濾布を有する２つのろ過室
を直列に接続し、固形化合物や煤塵、重金属類を効果的
に回収するものである。2. Description of the Related Art Conventionally, a two-stage bag filter, which is an example of a two-stage dust collector, has two filter chambers each having a filter cloth connected in series to effectively remove solid compounds, soot dust, and heavy metals. It is to be collected.
【０００３】排ガス中に含まれる塩化水素ガスや亜硫酸
ガスを回収する方法として、アルカリ粉末、たとえば炭
酸カルシウムＣａＣＯ3 、消石灰Ｃａ（ＯＨ）2 などの
アルカリ性薬剤（粉末）を排ガス中に吹き込んで反応さ
せ、固形化合物を生成してバグフィルタにより回収する
ものがある。As a method for recovering hydrogen chloride gas and sulfurous acid gas contained in exhaust gas, an alkaline powder (eg, calcium carbonate CaCO 3 or slaked lime Ca (OH) 2 ) is injected into the exhaust gas to react. , Some produce solid compounds and collect them with a bag filter.
【０００４】上記アルカリ粉末、たとえば消石灰が吹き
込まれると、排ガス中の塩化水素や亜硫酸ガスは下記の
固気反応により、 ２ＨＣｌ＋Ｃａ（ＯＨ）2 →ＣａＣｌ2 ＋２Ｈ2 Ｏ ＳＯ2 ＋Ｃａ（ＯＨ）2 →ＣａＳＯ3 ＋Ｈ2 Ｏ 固形化合物が生成される。When the above-mentioned alkaline powder, for example, slaked lime is blown, hydrogen chloride and sulfurous acid gas in the exhaust gas are subjected to the following solid-gas reaction to produce 2HCl + Ca (OH) 2 → CaCl 2 + 2H 2 O SO 2 + Ca (OH) 2 → CaSO. A 3 + H 2 O solid compound is formed.
【０００５】ところで２段式バグフィルタでは、前段の
ろ過室で除塵を行った後、後段のろ過室の入口でアルカ
リ性薬剤と反応助剤が吹き込まれて固形化合物が生成さ
れ有害ガスが除去されている。By the way, in the two-stage bag filter, after the dust is removed in the former filtration chamber, an alkaline chemical and a reaction aid are blown into the latter filtration chamber to form a solid compound and remove harmful gases. There is.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記後段のろ
過室の濾布で回収されるアルカリ性薬剤は、約５０％が
未反応で、このため薬剤使用量が多く運転コストが高く
なるとともに、バグフィルタによる飛灰の捕集量が増大
して、この飛灰の処理量が増大し、飛灰の処理設備の大
形化を招いている。However, about 50% of the alkaline chemicals recovered by the filter cloth in the latter-stage filtration chamber are unreacted, which causes a large amount of chemicals to be used, resulting in high operating cost and baggage. The amount of fly ash collected by the filter is increased, and the amount of fly ash treated is increased, resulting in an increase in the size of fly ash treatment equipment.
【０００７】なお、１段式のバグフィルタで一度使用し
た薬剤を貯留し、その一部を新しい薬剤と共に吹き込
み、再利用するものがあるが、再利用薬剤の反応効率を
上げるために再利用薬剤の冷却工程や粉砕工程を必要と
し、装置が複雑化するという問題があった。[0007] There is a one-stage bag filter in which a drug used once is stored and a part of it is blown with a new drug for reuse, but in order to improve the reaction efficiency of the reused drug, the reused drug is reused. However, there is a problem that the apparatus becomes complicated because it requires the cooling step and the crushing step.
【０００８】本発明のうち請求項１記載の発明は、上記
問題点を解決して、簡単な設備でアルカリ性薬剤を効果
的に反応させることができて、薬剤の使用量を低減させ
ることができる２段式集塵設備および２段式集塵設備に
よる排ガスの除塵方法を提供することを目的とする。The invention according to claim 1 of the present invention can solve the above-mentioned problems and can effectively react an alkaline drug with a simple facility, and can reduce the amount of the drug used. It is an object of the present invention to provide a two-stage type dust collecting facility and a method for removing exhaust gas from the two-stage type dust collecting facility.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に本発明の請求項１記載の２段式集塵設備は、排ガス管
路の上流側に前段集塵手段を配置するとともに、前段集
塵手段の下流側に後段集塵手段を配置した２段式集塵設
備において、前記後段集塵手段を濾布を備えた後段ろ過
室により構成し、前段集塵手段と後段ろ過室との間の排
ガス通路に、排ガス中にアルカリ性粉末薬剤を供給する
薬剤供給装置を設け、後段ろ過室の濾布により飛灰と共
に回収された未反応粉末薬剤を、飛灰と共に前段集塵手
段の入口側排ガス管路の排ガス中に吹き込む回収薬剤再
供給手段を設けたことを特徴とする。In order to achieve the above object, in the two-stage type dust collecting equipment according to claim 1 of the present invention, the pre-stage dust collecting means is arranged on the upstream side of the exhaust gas pipe and the pre-stage collecting equipment is provided. In a two-stage type dust collecting facility in which a post-stage dust collecting means is arranged on the downstream side of the dust means, the post-stage dust collecting means is constituted by a post-stage filtration chamber provided with a filter cloth, and the post-stage dust collecting means and the post-stage filtration chamber are provided. In the exhaust gas passage of, the chemical supply device that supplies alkaline powder chemicals into the exhaust gas is installed, and the unreacted powder chemicals collected with the fly ash by the filter cloth of the post-stage filtration chamber, together with the fly ash, the exhaust gas on the inlet side of the pre-stage dust collection means It is characterized in that a recovery chemical re-supply means for blowing into the exhaust gas of the pipeline is provided.
【００１０】上記構成によれば、後段ろ過室の濾布で捕
集される約半分の未反応粉末薬剤を、再度排ガス中に投
入することにより、排ガス中の酸性ガスと反応させて前
段集塵手段により捕集することができ、アルカリ性粉末
薬剤の反応率を大幅に向上することができる。その分、
粉末薬剤の使用量を大幅に減少させることができ、運転
コストを低減できるとともに、回収飛灰の処理量も減少
させることができ、飛灰の処理設備のコンパクト化が可
能となる。また冷却工程や粉砕工程を必要とせず、設備
の簡略化が図れる。According to the above construction, about half of the unreacted powder chemicals collected by the filter cloth in the latter filtration chamber is fed again into the exhaust gas to react with the acid gas in the exhaust gas and to collect the former dust. It can be collected by means, and the reaction rate of the alkaline powder drug can be greatly improved. That much
The amount of powdered chemicals used can be greatly reduced, the operating cost can be reduced, and the amount of recovered fly ash treated can be reduced, and the fly ash treatment facility can be made compact. Moreover, the cooling process and the crushing process are not required, and the equipment can be simplified.
【００１１】また、請求項２記載の発明は、請求項１記
載の構成において、前段集塵手段を濾布を備えた前段ろ
過室により構成したことを特徴とする。さらに、請求項
３記載の発明は、請求項１記載の構成において、前段集
塵手段をサイクロン式集塵器により構成したことを特徴
とする。The invention according to claim 2 is characterized in that, in the structure according to claim 1, the pre-stage dust collecting means is constituted by a pre-stage filtration chamber provided with a filter cloth. Further, the invention according to claim 3 is characterized in that, in the configuration according to claim 1, the pre-stage dust collecting means is constituted by a cyclone type dust collector.
【００１２】また、請求項４記載の発明は、請求項１〜
３記載の構成において、回収薬剤再供給手段に、排ガス
管路に配設された排ガス中に飛灰と共に未反応粉末薬剤
を吹き込む吹込ノズルと、この吹込ノズルの上流側に未
反応粉末薬剤を分散させる空気または蒸気を供給する分
散ノズルを配置したことを特徴とする。[0012] The invention described in claim 4 is the first invention.
In the configuration of 3, the blowing agent for blowing the unreacted powdered chemical together with the fly ash into the exhaust gas arranged in the exhaust gas pipe, and the unreacted powdered chemical are dispersed on the upstream side of the blowing nozzle in the recovered chemical resupply means. It is characterized in that a dispersion nozzle for supplying air or steam to be generated is arranged.
【００１３】上記構成によれば、吹込ノズルの上流側近
傍で空気または水蒸気が吹き込まれることにより、飛灰
と共にアルカリ粉末薬剤が効果的に分散されて排ガスと
の接触面接が増大され、固気反応がより促進されること
により、未反応粉末薬剤の反応率を向上させることがで
きる。According to the above construction, air or water vapor is blown in the vicinity of the upstream side of the blowing nozzle to effectively disperse the alkali powder chemicals together with the fly ash, thereby increasing the contact surface contact with the exhaust gas and solid-gas reaction. Is further promoted, the reaction rate of the unreacted powder drug can be improved.
【００１４】さらに請求項５記載の発明は、上記構成に
おいて、前段ろ過室と後段ろ過室とを左右に隣接して配
置したことを特徴とする。また請求項６記載の発明は、
上記構成において、前段ろ過室と後段ろ過室とを上下に
隣接して配置したことを特徴とする。Further, the invention according to claim 5 is characterized in that, in the above-mentioned structure, the front-stage filtration chamber and the rear-stage filtration chamber are arranged adjacent to each other on the left and right. The invention according to claim 6 is
In the above configuration, the front-stage filtration chamber and the rear-stage filtration chamber are arranged vertically adjacent to each other.
【００１５】上記請求項５および６の構成によれば、設
備全体をコンパクト化することができる。According to the structures of claims 5 and 6, the entire equipment can be made compact.
【００１６】さらに、請求項７記載の２段式集塵設備に
よる排ガスの除塵方法は、排ガスを前段集塵手段により
除塵した後、次いで後段集塵手段により除塵する２段式
集塵設備を使用して排ガスを除塵するに際し、後段集塵
手段である後段ろ過室の入口で排ガス中にアルカリ性薬
剤を吹き込んで排ガス中の酸性ガスと反応させ、生成さ
れた固形化合物および未反応粉末薬剤を含む飛灰を後段
ろ過室の濾布で捕集し、回収された飛灰を、再度前段集
塵手段の排ガス中に吹き込んで未反応粉末薬剤と酸性ガ
スとを再度反応させ、生成された固形化合物を飛灰と共
に前段集塵手段により捕集することを特徴とする。Further, the method of removing exhaust gas by the two-stage type dust collecting equipment according to claim 7 uses the two-stage type dust collecting equipment which removes the exhaust gas by the former stage dust collecting means and then by the latter stage dust collecting means. When removing the exhaust gas, the alkaline chemical agent is blown into the exhaust gas at the entrance of the latter-stage filtration chamber, which is the latter-stage dust collecting means, to react with the acidic gas in the exhaust gas, and the solid compound produced and the unreacted powder chemical agent The ash is collected by the filter cloth of the latter-stage filtration chamber, the fly ash collected is blown into the exhaust gas of the former-stage dust collecting means again to cause the unreacted powdered drug and the acid gas to react again, and the produced solid compound is removed. It is characterized in that it is collected together with the fly ash by the pre-stage dust collecting means.
【００１７】上記構成によれば、後段ろ過室の濾布で捕
集される約半分の未反応粉末薬剤を、再度排ガス中に投
入することにより、排ガス中の酸性ガスと反応させて前
段集塵手段により捕集することができ、アルカリ性粉末
薬剤の反応率を大幅に向上することができる。その分、
粉末薬剤の使用量を大幅に減少させることができ、運転
コストを低減できるとともに、回収飛灰の処理量も減少
させることができ、飛灰の処理設備のコンパクト化が可
能となる。また冷却工程や粉砕工程を必要とせず、設備
の簡略化が図れる。According to the above construction, about half of the unreacted powdered chemicals collected by the filter cloth in the latter-stage filtration chamber is fed again into the exhaust gas to react with the acid gas in the exhaust gas and to collect the former-stage dust. It can be collected by means, and the reaction rate of the alkaline powder drug can be greatly improved. That much
The amount of powdered chemicals used can be greatly reduced, the operating cost can be reduced, and the amount of recovered fly ash treated can be reduced, and the fly ash treatment facility can be made compact. Moreover, the cooling process and the crushing process are not required, and the equipment can be simplified.
【００１８】上記各構成において、「飛灰」とは、排ガ
ス中に含まれる塵埃や重金属類、未反応薬剤、薬剤と反
応されて生成された塩類や硫化物などの固形化合物を示
す。In each of the above-mentioned structures, "fly ash" refers to solid compounds such as dust and heavy metals contained in exhaust gas, unreacted chemicals, salts and sulfides produced by reaction with chemicals.
【００１９】[0019]
【発明の実施の形態】ここで、本発明に係る並設形２段
式バグフィルタ集塵設備の第１の実施の形態を図１およ
び図２に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a side-by-side two-stage bag filter dust collecting facility according to the present invention will now be described with reference to FIGS.
【００２０】ケーシング２Ａ，２Ｂにより形成される前
段ろ過室１Ａおよび後段ろ過室１Ｂが隔壁３を介して一
体に並設され、ろ過室１Ａ，１Ｂ内には、下部の濾布室
１ａと上部の排出室１ｂとを仕切る仕切り壁４Ａ，４Ｂ
に複数の挿通孔４ａ，４ｂが形成され、挿通孔４ａ，４
ｂに取り付けられて濾布室１ａに垂下された袋状濾布５
Ａ，５Ｂが設けられている。A front-stage filtration chamber 1A and a rear-stage filtration chamber 1B formed by casings 2A and 2B are integrally provided side by side through a partition wall 3. Inside the filtration chambers 1A and 1B, a lower filter cloth chamber 1a and an upper filter chamber 1a are provided. Partition walls 4A and 4B that partition the discharge chamber 1b
A plurality of insertion holes 4a, 4b are formed in the
The bag-like filter cloth 5 attached to the filter b and suspended in the filter cloth chamber 1a
A and 5B are provided.
【００２１】排ガス管路を形成する排ガス導入管６Ａは
前段ろ過室１Ａの濾布室１ａに接続され、また同排ガス
排出管６Ｂは後段ろ過室１Ｂの排出室１ｂに接続されて
いる。また前段ろ過室１Ａの排出室１ｂと後段ろ過室１
Ｂの濾布室１ａは、隔壁３に沿って形成された接続通路
（排ガス通路）７により連通され、接続通路７の入口の
ケーシング２Ａの天部には薬剤供給装置８が配置されて
いる。この薬剤供給装置８は、図示しない薬剤タンクや
定量供給装置と、排ガス中にアルカリ性粉末薬剤、たと
えば消石灰および反応を促進させる反応助剤を供給する
複数本（図示は４本）の薬剤ノズル８ａとで構成され
る。The exhaust gas introducing pipe 6A forming the exhaust gas pipe is connected to the filter cloth chamber 1a of the pre-stage filtration chamber 1A, and the exhaust gas discharge pipe 6B is connected to the exhaust chamber 1b of the post-stage filtration chamber 1B. In addition, the discharge chamber 1b of the front stage filtration chamber 1A and the rear stage filtration chamber 1
The filter cloth chamber 1a of B is communicated with a connection passage (exhaust gas passage) 7 formed along the partition wall 3, and a medicine supply device 8 is arranged at the top of the casing 2A at the inlet of the connection passage 7. The chemical supply device 8 includes a chemical tank and a constant quantity supply device (not shown), and a plurality (four in the figure) of chemical nozzles 8a for supplying alkaline powder chemicals such as slaked lime and a reaction auxiliary agent for accelerating the reaction in the exhaust gas. Composed of.
【００２２】前段ろ過室１Ａと後段ろ過室１Ｂの下部に
は、自然落下した飛灰または逆洗空気により強制的に落
下された飛灰を排出するたとえばスクリューコンベヤ装
置からなる前段飛灰回収装置９Ａ、後段飛灰回収装置９
Ｂがそれぞれ設けられている。そして後段飛灰回収装置
９Ｂと排ガス導入管６Ａとの間には、後段ろ過室１Ｂか
ら飛灰と共に回収された未反応粉末薬剤を、飛灰と共に
再度排ガス中に吹き込む回収薬剤再供給手段１０が設け
られており、この回収薬剤再供給手段１０は、後段飛灰
回収装置９Ｂの排出口に設けられた後段ロータリーバル
ブ１１Ｂを介して接続された薬剤循環ノズル１２と、そ
の上流側近傍に貫設された分散ノズル１３とが設けられ
ている。In the lower part of the pre-stage filtration chamber 1A and the post-stage filtration chamber 1B, the pre-stage fly ash recovery device 9A, which is composed of, for example, a screw conveyor device, which discharges fly ash that naturally falls or is forcedly dropped by backwash air , Rear fly ash recovery device 9
B are provided respectively. And between the latter-stage fly ash recovery device 9B and the exhaust gas introduction pipe 6A, there is a recovered chemical re-supply means 10 which blows the unreacted powdered medicine recovered together with the fly ash from the latter-stage filtration chamber 1B into the exhaust gas together with the fly ash. The collected chemical re-supplying means 10 is provided, and the chemical circulation nozzle 12 is connected through a rear rotary valve 11B provided at the discharge port of the rear fly ash recovery apparatus 9B, and is provided in the vicinity of the upstream side thereof. The dispersed nozzle 13 is provided.
【００２３】したがって、薬剤循環ノズル１２により後
段ろ過室１Ｂで捕集した未反応薬剤を含む飛灰を排ガス
導入管６Ａ内の排ガス中に吹き込み、未反応薬剤と排ガ
ス中の塩化水素ガスや亜硫酸ガスと反応させることがで
きる。さらに図示しない圧縮空気供給装置または蒸気発
生装置から分散ノズル１３により、分散用の圧縮空気ま
たは高圧蒸気が噴射され、未反応薬剤を含む飛灰が効果
的に分散されて未反応薬剤の反応効率をより向上させる
ことができる。Therefore, the fly ash containing the unreacted chemical collected by the chemical circulation nozzle 12 in the latter filtration chamber 1B is blown into the exhaust gas in the exhaust gas introducing pipe 6A, and the unreacted chemical and hydrogen chloride gas or sulfurous acid gas in the exhaust gas are blown. Can be reacted with. Further, compressed air or high-pressure steam for dispersion is jetted by a dispersion nozzle 13 from a compressed air supply device or a steam generator (not shown) to effectively disperse the fly ash containing the unreacted drug to improve the reaction efficiency of the unreacted drug. It can be further improved.
【００２４】上記構成において、排ガス導入管６Ａから
供給された排ガスは前段ろ過室１Ａに導入されて濾布５
Ａを通過し除塵された後、接続通路７に導入され、ここ
で薬剤ノズル８ａからアルカリ性粉末薬剤（たとえば消
石灰）と助剤とが排ガス中に吹き込まれて排ガス中に含
まれる塩化水素ガスや亜硫酸ガスと反応させ、固形化合
物が生成される。この固形化合物と未反応薬剤を含む飛
灰は、後段ろ過室１Ｂの濾布５Ｂに捕集され、排ガスは
排ガス排出管６Ｂからクリーンな排ガスとして排出され
る。In the above structure, the exhaust gas supplied from the exhaust gas introducing pipe 6A is introduced into the pre-stage filtration chamber 1A and the filter cloth 5
After passing through A to be dedusted, it is introduced into the connection passage 7, where an alkaline powder chemical (for example, slaked lime) and an auxiliary agent are blown into the exhaust gas from the chemical nozzle 8a, and hydrogen chloride gas or sulfurous acid contained in the exhaust gas. Reacting with gas produces a solid compound. The fly ash containing the solid compound and the unreacted chemical is collected on the filter cloth 5B in the post-filtration chamber 1B, and the exhaust gas is discharged from the exhaust gas discharge pipe 6B as clean exhaust gas.
【００２５】後段ろ過室１Ｂの濾布５Ｂに捕集された未
反応薬剤を含む飛灰は、自然落下または逆洗空気により
飛灰回収装置９Ｂにより回収されて排出され、後段ロー
タリーバルブ１１Ｂを介して薬剤循環ノズル１２から排
ガス導入管６Ａの排ガス中に吹き込まれる。この時、分
散ノズル１３から分散用の圧縮空気または高圧蒸気を噴
射されて未反応薬剤を含む飛灰が効果的に分散され、未
反応薬剤と排ガス中の酸性ガスとが効果的に反応され、
薬剤の反応効率がより向上される。そして、前段ろ過室
１Ａの濾布５Ａにより塵埃と固形化合物を含む飛灰が捕
集され、飛灰回収装置９Ａにより回収排出されて、飛灰
処理装置に搬送される。The fly ash containing the unreacted chemicals collected on the filter cloth 5B in the post-stage filtration chamber 1B is recovered by the fly ash recovery device 9B by natural fall or backwash air and discharged, and is passed through the post-stage rotary valve 11B. And is blown into the exhaust gas of the exhaust gas introduction pipe 6A from the chemical circulation nozzle 12. At this time, compressed air or high-pressure steam for dispersion is injected from the dispersion nozzle 13 to effectively disperse the fly ash containing the unreacted drug, and the unreacted drug and the acid gas in the exhaust gas are effectively reacted,
The reaction efficiency of the drug is further improved. Then, the fly ash containing dust and solid compounds is collected by the filter cloth 5A in the pre-stage filtration chamber 1A, collected and discharged by the fly ash collecting device 9A, and conveyed to the fly ash processing device.
【００２６】上記実施例によれば、従来において、飛灰
とともに処理されていた約５０％の未反応薬剤を、回収
した飛灰とともに、再度排ガス中に吹き込んで排ガスと
反応させ、前段ろ過室１Ａに導入して捕集するので、ア
ルカリ性粉末薬剤の反応率を大幅に向上させることがで
きて、その使用量を削減することができ、運転コストを
低減することができる。また、その結果固形化合物を含
む飛灰の回収量を減少させて、飛灰処理装置の処理量が
少なくてすみ、設備をコンパクト化できる。さらに、薬
剤の再利用に従来のように冷却工程や粉砕工程を必要と
しないので、全体を極めて簡素化することができる。According to the above-mentioned embodiment, about 50% of the unreacted chemical that has been conventionally treated with fly ash is blown into the exhaust gas again together with the recovered fly ash to react with the exhaust gas, and the pre-stage filtration chamber 1A is used. Since it is introduced and collected in the above, the reaction rate of the alkaline powder chemical can be significantly improved, the amount used can be reduced, and the operating cost can be reduced. Further, as a result, the amount of fly ash containing the solid compound can be reduced, the amount of fly ash processing equipment can be reduced, and the equipment can be made compact. Further, since the cooling process and the crushing process are not required for reusing the medicine as in the conventional case, the whole structure can be extremely simplified.
【００２７】ついで、本発明に係る平板形２段式バグフ
ィルタ集塵設備の第２の実施の形態を図３および図４に
基づいて説明する。下部に中央側に傾斜する収集傾斜板
２２ａ，２２ｂが設けられたケーシング２２Ａ，２２Ｂ
により、後段ろ過室２１Ｂと前段ろ過室２１Ａとが上下
に積み重ねられて一体に構成されている。Next, a second embodiment of the flat plate type two-stage bag filter dust collecting equipment according to the present invention will be described with reference to FIGS. 3 and 4. Casing 22A, 22B provided with collecting slanting plates 22a, 22b slanting toward the center side in the lower part
Thus, the post-stage filtration chamber 21B and the pre-stage filtration chamber 21A are vertically stacked and integrally configured.
【００２８】前段ろ過室２１Ａは、図３左側に設けられ
た仕切り壁２３Ａにより右側の濾布室２１ａと左側の排
出室２１ｂとに区画され、仕切り壁２３Ａに形成された
挿通穴２３ａに平板形断面の濾布２４Ａが取り付けられ
て濾布室２１ａ側に伸びている。そして、濾布室２１ａ
に排ガス導入管２５Ａが接続されるとともに、排出室２
１ｂに接続管（排ガス通路）２７が接続されている。収
集傾斜板２２ａの下部にはスクリューコンベヤ装置から
なる飛灰回収装置２６Ａが設けられている。The pre-stage filtration chamber 21A is partitioned into a filter cloth chamber 21a on the right side and a discharge chamber 21b on the left side by a partition wall 23A provided on the left side of FIG. 3, and a flat plate-shaped insertion hole 23a formed in the partition wall 23A. A filter cloth 24A having a cross section is attached and extends to the filter cloth chamber 21a side. And the filter cloth chamber 21a
The exhaust gas introducing pipe 25A is connected to the exhaust chamber 2
A connecting pipe (exhaust gas passage) 27 is connected to 1b. Below the collecting inclined plate 22a, a fly ash collecting device 26A including a screw conveyor device is provided.
【００２９】後段ろ過室２１Ｂは、図３右側に設けられ
た仕切り壁２３Ｂにより左側の濾布室２１ｃと右側の排
出室２１ｄとに区画され、仕切り壁２３Ｂに形成された
挿通穴２３ｂに平板形断面の濾布２４Ｂが取り付けられ
て濾布室２１ｃ側に伸びている。そして、濾布室２１ｃ
に接続管２７が接続されるとともに、排出室２１ｄに排
ガス排出管２５Ｂが接続されている。また収集傾斜板２
２ｂの下部にはスクリューコンベヤ装置からなる飛灰回
収装置２６Ｂが設けられている。２８は前段ロータリー
バルブ２９Ａを介して捕集した飛灰を飛灰処理装置に送
る飛灰排出管である。The latter-stage filtration chamber 21B is partitioned into a filter cloth chamber 21c on the left side and a discharge chamber 21d on the right side by a partition wall 23B provided on the right side of FIG. 3, and a flat plate-shaped insertion hole 23b formed in the partition wall 23B. A filter cloth 24B having a cross section is attached and extends to the filter cloth chamber 21c side. And the filter cloth chamber 21c
The connection pipe 27 is connected to the exhaust chamber 21d, and the exhaust gas exhaust pipe 25B is connected to the exhaust chamber 21d. In addition, the collecting slope plate
A fly ash recovery device 26B composed of a screw conveyor device is provided below 2b. Reference numeral 28 is a fly ash discharge pipe for sending the fly ash collected via the front rotary valve 29A to the fly ash processing apparatus.
【００３０】この飛灰回収装置２６Ｂの出口と排ガス導
入管２５Ａとの間には、回収薬剤再供給手段３０を構成
する後段ロータリーバルブ２９Ｂが設けられ、ロータリ
ーバルブ２９Ｂに薬剤循環ノズル３１が接続されてい
る。またその上流近傍に分散ノズル３２が貫設されてい
る。Between the outlet of the fly ash recovery device 26B and the exhaust gas introducing pipe 25A, a rear stage rotary valve 29B which constitutes the recovered drug resupply means 30 is provided, and the drug circulation nozzle 31 is connected to the rotary valve 29B. ing. A dispersion nozzle 32 is provided in the vicinity of the upstream of the dispersion nozzle 32.
【００３１】また、接続管２７には薬剤供給装置３３が
設けられている。この薬剤供給装置３３は図示しない薬
剤タンクと定量供給装置、そして接続管２７に貫設され
て排ガス中にアルカリ性粉末薬剤、たとえば消石灰を吹
き込む薬剤ノズル３３ａと、その下流側の助剤ノズル３
３ｂとで構成される。Further, the connection pipe 27 is provided with a medicine supply device 33. The chemical supply device 33 is provided with a chemical tank, a constant quantity supply device (not shown), and a connection pipe 27. The chemical supply nozzle 33 blows an alkaline powder chemical, for example, slaked lime into the exhaust gas, and the auxiliary agent nozzle 3 on the downstream side.
3b and.
【００３２】上記構成において、排ガス導入管２５Ａか
ら供給された排ガスは、まず前段ろ過室２１Ａに導入さ
れて濾布２４Ａを通過し除塵された後、接続管２７に導
入され、ここで薬剤ノズル３３ａと助剤ノズル３３ｂか
らアルカリ性粉末薬剤（たとえば消石灰）と助剤とが吹
き込まれて排ガス中に含まれる塩化水素ガスや亜硫酸ガ
スと反応され、固形化合物が生成される。この固形化合
物と未反応薬剤を含む飛灰は、後段ろ過室２１Ｂの濾布
２４Ｂに捕集され、排ガスは排ガス排出管２５Ｂからク
リーンな排ガスとして排出される。In the above structure, the exhaust gas supplied from the exhaust gas introducing pipe 25A is first introduced into the pre-stage filtration chamber 21A, passes through the filter cloth 24A to be dust-removed, and then is introduced into the connecting pipe 27, where the chemical nozzle 33a is provided. The alkaline powder chemical (for example, slaked lime) and the auxiliary agent are blown from the auxiliary agent nozzle 33b and reacted with hydrogen chloride gas or sulfurous acid gas contained in the exhaust gas to produce a solid compound. The fly ash containing the solid compound and the unreacted chemical is collected by the filter cloth 24B in the post-filtration chamber 21B, and the exhaust gas is discharged as clean exhaust gas from the exhaust gas discharge pipe 25B.
【００３３】後段ろ過室２１Ｂの濾布２４Ｂに捕集され
た未反応薬剤を含む飛灰は、自然落下または逆洗空気に
より飛灰回収装置２６Ｂにより回収されて排出され、後
段ロータリーバルブ２９Ｂから薬剤循環ノズル３１に送
られて排ガス導入管２５Ａの排ガス中に吹き込まれる。
この時、分散ノズル３２から分散用の圧縮空気または高
圧蒸気が噴射されて未反応薬剤を含む飛灰が効果的に分
散され、未反応薬剤と排ガス中の酸性ガスとが効果的に
反応され、薬剤の反応効率がより向上される。そして、
前段ろ過室２１Ａの濾布２４Ａにより塵埃と固形化合物
を含む飛灰が捕集され、飛灰回収装置２６Ａにより回収
排出されて、飛灰処理装置に搬送される。The fly ash containing the unreacted drug collected on the filter cloth 24B of the post-stage filtration chamber 21B is recovered and discharged by the fly ash recovery device 26B by natural fall or backwash air, and the chemical is discharged from the post-stage rotary valve 29B. It is sent to the circulation nozzle 31 and blown into the exhaust gas in the exhaust gas introducing pipe 25A.
At this time, compressed air or high-pressure steam for dispersion is jetted from the dispersion nozzle 32 to effectively disperse the fly ash containing the unreacted drug, and the unreacted drug and the acid gas in the exhaust gas are effectively reacted, The reaction efficiency of the drug is further improved. And
Fly ash containing dust and solid compounds is collected by the filter cloth 24A in the upstream filtration chamber 21A, collected and discharged by the fly ash collection device 26A, and conveyed to the fly ash processing device.
【００３４】上記構成によれば、先の実施の形態と同様
の効果を奏することができる。図５は、前段集塵手段に
反応用サイクロン式集塵装置を採用した２段式集塵設備
の第３の実施の形態を示す。According to the above structure, it is possible to obtain the same effect as that of the previous embodiment. FIG. 5 shows a third embodiment of a two-stage type dust collecting facility in which a reaction cyclone type dust collecting device is adopted as the front stage dust collecting means.
【００３５】排ガス導入管４１が前段集塵手段である反
応用サイクロン（サイクロン集塵装置）４２が接続さ
れ、その下流側に排ガス通路を構成する接続管４３を介
して後段ろ過室４４が配設されている。後段ろ過室４４
には、下部の濾布室４４ａと上部の排出室４４ｂとを仕
切る仕切り壁４５に複数の挿通孔４５ａが形成され、挿
通孔４５ａに取り付けられて濾布室４４ａに垂下された
袋状濾布４６が設けられている。An exhaust gas introducing pipe 41 is connected to a reaction cyclone (cyclone dust collecting device) 42 which is a pre-stage dust collecting means, and a post-stage filtration chamber 44 is arranged on the downstream side thereof through a connecting pipe 43 constituting an exhaust gas passage. Has been done. Second-stage filtration chamber 44
Has a plurality of insertion holes 45a formed in a partition wall 45 for partitioning the lower filter cloth chamber 44a and the upper discharge chamber 44b, and the bag-like filter cloth attached to the insertion hole 45a and hung in the filter cloth chamber 44a. 46 is provided.
【００３６】前記反応用サイクロン４２は、円筒形ケー
シング４２ａの上部で偏心した位置に排ガス導入管４１
が接続され、内部で排ガスの旋回流を形成してその遠心
力により塵埃や飛灰をケーシング４２ａの内面に沿って
落下させ捕捉するとともに、排ガスを攪拌して薬剤との
反応を促進させることができる。そしてケーシング４２
ａの下端部には、捕捉された飛灰を排出するたとえばス
クリューコンベヤ装置からなる前段飛灰回収装置４７が
設けられている。The reaction cyclone 42 has an exhaust gas introducing pipe 41 at an eccentric position above the cylindrical casing 42a.
Is connected to form a swirl flow of the exhaust gas, and by its centrifugal force, dust and fly ash are dropped along the inner surface of the casing 42a to be captured, and the exhaust gas is agitated to promote the reaction with the drug. it can. And the casing 42
At the lower end of a, there is provided a pre-stage fly ash recovery device 47 that is a screw conveyor device for discharging the captured fly ash.
【００３７】ケーシング４２ａの下部には、後段ろ過室
４４の濾布室４４ａに連通される接続管４３が接続され
る。この接続管４３には、薬剤供給装置４８を構成する
単数または複数の薬剤ノズル４８ａが設けられており、
この薬剤供給装置４８は、図示しない薬剤タンクおよび
定量供給装置により、薬剤ノズル４８ａから排ガス中に
アルカリ性粉末薬剤、たとえば消石灰および反応を促進
させる反応助剤を供給することができる。A connection pipe 43 communicating with the filter cloth chamber 44a of the post-stage filtration chamber 44 is connected to the lower portion of the casing 42a. The connection pipe 43 is provided with a single or a plurality of drug nozzles 48 a that constitute the drug supply device 48.
The chemical supply device 48 can supply an alkaline powder chemical, for example, slaked lime and a reaction auxiliary agent that promotes the reaction, into the exhaust gas from the chemical nozzle 48a by a chemical tank and a constant quantity supply device (not shown).
【００３８】また、後段ろ過室４４の排出室４４ｂには
排ガス排出管４９が接続され、さらに後段ろ過室４４の
下端部には、自然落下または逆洗空気により捕捉された
飛灰を排出するたとえばスクリューコンベヤ装置からな
る後段飛灰回収装置５０が設けられている。またこの後
段飛灰回収装置５０により後段ろ過室４４から飛灰と共
に回収された未反応粉末薬剤を、飛灰と共に再度排ガス
中に吹き込む回収薬剤再供給手段５１が設けられてお
り、この回収薬剤再供給手段５１は、後段飛灰回収装置
５０の排出口に設けられた後段ロータリーバルブ５１ａ
を介して接続された薬剤循環ノズル５１ｂと、その上流
側近傍に貫設された分散ノズル５１ｃとで構成されてい
る。Further, an exhaust gas discharge pipe 49 is connected to the discharge chamber 44b of the post-stage filtration chamber 44, and the fly ash trapped by free fall or backwash air is discharged to the lower end of the post-stage filtration chamber 44, for example. A post-stage fly ash recovery device 50 including a screw conveyor device is provided. Further, there is provided a recovered chemical re-supplying means 51 for blowing the unreacted powdered chemical recovered with the fly ash together with the fly ash into the exhaust gas again by the latter-stage fly ash recovery device 50. The supply means 51 is a rear stage rotary valve 51 a provided at the discharge port of the rear stage fly ash recovery apparatus 50.
It is composed of a medicine circulation nozzle 51b connected via a nozzle and a dispersion nozzle 51c penetrating in the vicinity of the upstream side thereof.
【００３９】したがって、薬剤循環ノズル５１ｂにより
後段ろ過室４４で捕集した未反応薬剤を含む飛灰を排ガ
ス導入管４１内の排ガス中に吹き込み、未反応薬剤と排
ガス中の塩化水素ガスや亜硫酸ガスと反応させることが
できる。さらに図示しない圧縮空気供給装置または蒸気
発生装置から分散ノズル５１ｃにより、分散用の圧縮空
気または高圧蒸気が噴射され、未反応薬剤を含む飛灰が
効果的に分散されて未反応薬剤の反応効率をより向上さ
せることができる。Therefore, the fly ash containing the unreacted chemicals collected in the second-stage filtration chamber 44 by the chemical circulation nozzle 51b is blown into the exhaust gas in the exhaust gas introduction pipe 41, and the unreacted chemicals and hydrogen chloride gas or sulfurous acid gas in the exhaust gas are blown. Can be reacted with. Further, compressed air or high-pressure steam for dispersion is jetted by a dispersion nozzle 51c from a compressed air supply device or a steam generator (not shown) to effectively disperse the fly ash containing the unreacted drug to improve the reaction efficiency of the unreacted drug. It can be further improved.
【００４０】なお、この回収薬剤再供給手段５１におい
て、ロータリーバルブ５１ａと薬剤循環ノズル５１ｂと
の間に気送配管を介在させ、仮想線で示すように薬剤循
環ノズル５１ｂと分散ノズル５１ｃとを反応用サイクロ
ン４２の入口近傍に配置してもよい。In the collected medicine re-supplying means 51, an air feeding pipe is interposed between the rotary valve 51a and the medicine circulating nozzle 51b so that the medicine circulating nozzle 51b and the dispersion nozzle 51c react with each other as shown by a phantom line. It may be arranged near the inlet of the cyclone 42 for use.
【００４１】上記構成において、排ガス導入管４１から
供給された排ガスは、反応用サイクロン４２に導入され
ケーシング４２ａ内に形成される遠心力により除塵され
た後、接続管４３に導入される。ここで薬剤ノズル４８
ａからアルカリ性粉末薬剤（たとえば消石灰）と助剤と
が排ガス中に吹き込まれて排ガス中に含まれる塩化水素
ガスや亜硫酸ガスと反応され、固形化合物が生成され
る。この固形化合物と未反応薬剤を含む飛灰は、後段ろ
過室４４の濾布４６に捕集され、排ガスは排ガス排出管
４９からクリーンな排ガスとして排出される。In the above structure, the exhaust gas supplied from the exhaust gas introducing pipe 41 is introduced into the reaction cyclone 42 and dust is removed by the centrifugal force formed in the casing 42a, and then introduced into the connecting pipe 43. Here the drug nozzle 48
From a, an alkaline powder chemical (for example, slaked lime) and an auxiliary agent are blown into the exhaust gas and reacted with hydrogen chloride gas or sulfurous acid gas contained in the exhaust gas to produce a solid compound. The fly ash containing the solid compound and the unreacted chemical is collected by the filter cloth 46 in the post-stage filtration chamber 44, and the exhaust gas is exhausted as clean exhaust gas from the exhaust gas exhaust pipe 49.
【００４２】後段ろ過室４４の濾布４６に補集された未
反応薬剤を含む飛灰は、自然落下または逆洗空気により
後段飛灰回収装置５０に回収されて排出され、後段ロー
タリーバルブ５１ａを介して薬剤循環ノズル５１ｂから
排ガス導入管４１の排ガス中に吹き込まれる。この時、
分散ノズル５１ｃから分散用の圧縮空気または高圧蒸気
を噴射されて未反応薬剤を含む飛灰が効率良く分散さ
れ、未反応薬剤と排ガス中の酸性ガスとが効果的に反応
され、薬剤の反応効率がより向上される。そして、反応
用サイクロン４２により反応が促進されるとともに、塵
埃と固形化合物を含む飛灰が捕集され、前段飛灰回収装
置４７により回収排出されて、飛灰処理装置に搬送され
る。またここで捕捉されない飛灰は、後段ろ過室４４で
確実に補集される。The fly ash containing the unreacted chemicals collected on the filter cloth 46 in the post-stage filtration chamber 44 is recovered by the post-stage fly ash recovery device 50 by natural fall or backwash air and discharged, and the post-stage rotary valve 51a is turned on. It is blown into the exhaust gas of the exhaust gas introduction pipe 41 from the chemical circulation nozzle 51b via the. At this time,
Compressed air or high-pressure steam for dispersion is jetted from the dispersion nozzle 51c to efficiently disperse the fly ash containing the unreacted drug, effectively reacting the unreacted drug with the acid gas in the exhaust gas, and increasing the reaction efficiency of the drug. Will be improved. Then, the reaction is promoted by the reaction cyclone 42, and fly ash containing dust and solid compounds is collected, collected and discharged by the pre-stage fly ash collection device 47, and conveyed to the fly ash treatment device. Further, the fly ash that is not captured here is reliably collected in the post-filtration chamber 44.
【００４３】上記実施例によれば、第１の実施の形態と
同様の効果を奏することができる。なお、前段集塵手段
の反応サイクロン４２に代えて、電気集塵器を使用する
こともできる。According to the above embodiment, the same effect as that of the first embodiment can be obtained. An electric dust collector may be used instead of the reaction cyclone 42 of the pre-stage dust collector.
【００４４】[0044]
【発明の効果】以上に述べたごとく、本発明の請求項１
および７記載の構成によれば、後段ろ過室の濾布で捕集
される約半分の未反応粉末薬剤を、再度排ガス中に投入
することにより、排ガス中の酸性ガスと反応させて捕集
することができ、アルカリ性粉末薬剤の反応率を大幅に
向上することができる。その分、粉末薬剤の使用量を大
幅に減少させることができ、運転コストを低減できると
ともに、回収飛灰の処理量も減少させることができ、飛
灰の処理設備のコンパクト化が可能となる。また冷却工
程や粉砕工程を必要とせず、設備の簡略化が図れる。As described above, according to the first aspect of the present invention,
According to the configurations described in (7) and (7), about half of the unreacted powdered chemical that is collected by the filter cloth in the latter-stage filtration chamber is introduced into the exhaust gas again to be reacted with the acidic gas in the exhaust gas and collected. It is possible to significantly improve the reaction rate of the alkaline powder drug. As a result, the amount of powder chemicals used can be greatly reduced, the operating cost can be reduced, and the amount of collected fly ash can be reduced, so that the fly ash treatment equipment can be made compact. Moreover, the cooling process and the crushing process are not required, and the equipment can be simplified.
【００４５】また、請求項４記載の発明によれば、吹込
ノズルの上流側近傍で空気または水蒸気が吹き込まれる
ことにより、飛灰と共にアルカリ粉末薬剤が効果的に分
散されて排ガスとの接触面接が増大され、固気反応がよ
り促進されることにより、未反応粉末薬剤の反応率を向
上させることができる。According to the fourth aspect of the present invention, air or water vapor is blown in the vicinity of the upstream side of the blowing nozzle, so that the alkaline powder chemicals are effectively dispersed together with the fly ash, and the contact surface contact with the exhaust gas is made. The reaction rate of the unreacted powder drug can be improved by increasing the solid-gas reaction.
【００４６】上記請求項５および６の構成によれば、設
備全体をコンパクト化することができる。According to the fifth and sixth aspects, the entire equipment can be made compact.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係る２段式集塵設備の第１の実施の形
態を示す正面断面図である。FIG. 1 is a front sectional view showing a first embodiment of a two-stage type dust collecting facility according to the present invention.
【図２】同２段式集塵設備の平面図である。FIG. 2 is a plan view of the same two-stage type dust collecting facility.
【図３】本発明に係る２段式集塵設備の第２の実施の形
態を示す正面断面図である。FIG. 3 is a front sectional view showing a second embodiment of a two-stage type dust collecting facility according to the present invention.
【図４】同２段式集塵設備の側面図である。FIG. 4 is a side view of the same two-stage dust collecting facility.
【図５】本発明に係る２段式集塵設備の第３の実施の形
態を示す正面断面図である。FIG. 5 is a front sectional view showing a third embodiment of a two-stage type dust collecting facility according to the present invention.
１Ａ 前段ろ過室 １Ｂ 後段ろ過室 ６Ａ 排ガス導入管 ６Ｂ 排ガス排出管 ７ 接続通路 ８ 薬剤供給装置 ８ａ 薬剤ノズル ９Ａ ９Ｂ 飛灰回収装置 １０ 回収薬剤再供給手段 １１Ｂ ロータリーバルブ １２ 薬剤循環ノズル １３ 分散ノズル ２１Ａ 前段ろ過室 ２１Ｂ 後段ろ過室 ２４Ａ，２４Ｂ 濾布 ２５Ａ 排ガス導入管 ２５Ｂ 排ガス排出管 ２６Ａ，２６Ｂ 飛灰回収装置 ２７ 接続管 ２９Ｂ ロータリーバルブ ３０ 回収薬剤再供給手段 ３１ 薬剤循環ノズル ３２ 分散ノズル ３３ 薬剤供給装置 ３３ａ 薬剤ノズル ３３ｂ 助剤ノズル ４１ 排ガス導入管 ４２ 反応サイクロン ４３ 接続管 ４４ 後段ろ過室 ４７ 前段飛灰回収装置 ４８ 薬剤供給装置 ５０ 後段飛灰回収装置 ５１ 回収薬剤再供給手段 1A Pre-stage filtration chamber 1B Post-stage filtration chamber 6A Exhaust gas introduction pipe 6B Exhaust gas discharge pipe 7 Connection passage 8 Chemical supply device 8a Chemical nozzle 9A 9B Fly ash recovery device 10 Recovered chemical re-supply means 11B Rotary valve 12 Chemical circulation nozzle 13 Dispersion nozzle 21A Pre-stage Filtration chamber 21B Second-stage filtration chamber 24A, 24B Filter cloth 25A Exhaust gas introduction pipe 25B Exhaust gas discharge pipe 26A, 26B Fly ash recovery device 27 Connection pipe 29B Rotary valve 30 Recovered chemical resupply means 31 Chemical circulation nozzle 32 Dispersion nozzle 33 Chemical supply device 33a Chemical nozzle 33b Auxiliary nozzle 41 Exhaust gas introduction pipe 42 Reaction cyclone 43 Connection pipe 44 Post-stage filtration chamber 47 Pre-stage fly ash recovery device 48 Chemical supply device 50 Post-stage fly ash recovery device 51 Recovered chemical re-supply means
───────────────────────────────────────────────────── 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 53/68 Ｂ０１Ｄ 53/34 １３６Ｚ 53/64 (72)発明者 下田 栖嗣 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 近藤 守 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 長井 健一 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 聶 澎 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication location B01D 53/68 B01D 53/34 136Z 53/64 (72) Inventor Shigeta Shigetsugu, Osaka City, Osaka Nishi-kujo 5-chome 3-28, Hitachi Shipbuilding Co., Ltd. (72) Inventor Mamoru Kondo, Nishikujo 5-chome 3-28 Nishikojo, Konohana-ku, Osaka, Osaka Prefecture (72) Inventor Kenichi Nagai Osaka, Osaka Hitachi Shipbuilding Co., Ltd., 5-3-28 Nishikujo, Konohana-ku, Yokohama (72) Inventor Leng Peng, 5-3-28 Nishikujo, Nishi-9-jo, Konohana-ku, Osaka, Osaka
Claims (7)
するとともに、前段集塵手段の下流側に後段集塵手段を
配置した２段式集塵設備において、前記後段集塵手段を
濾布を備えた後段ろ過室により構成し、前段集塵手段と
後段ろ過室との間の排ガス通路に、排ガス中にアルカリ
性粉末薬剤を供給する薬剤供給装置を設け、後段ろ過室
の濾布により飛灰と共に回収された未反応粉末薬剤を、
飛灰と共に前段集塵手段の入口側排ガス管路の排ガス中
に吹き込む回収薬剤再供給手段を設けたことを特徴とす
る２段式集塵設備。1. A two-stage type dust collecting facility in which a pre-stage dust collecting means is arranged on the upstream side of an exhaust gas pipe and a post-stage dust collecting means is arranged on the downstream side of the pre-stage dust collecting means. It is composed of a post-stage filtration chamber equipped with a filter cloth, and an exhaust gas passage between the pre-stage dust collecting means and the post-stage filtration chamber is provided with a chemical supply device for supplying an alkaline powder chemical to the exhaust gas. The unreacted powder drug collected with the fly ash,
A two-stage type dust collecting facility characterized in that it is provided with a collecting chemical re-supply means for blowing into the exhaust gas in the exhaust gas pipe on the inlet side of the front-stage dust collecting means together with fly ash.
より構成したことを特徴とする請求項１記載の２段式集
塵設備。2. The two-stage type dust collecting facility according to claim 1, wherein the pre-stage dust collecting means is constituted by a pre-stage filtration chamber provided with a filter cloth.
構成したことを特徴とする請求項１記載の２段式集塵設
備。3. The two-stage dust collecting facility according to claim 1, wherein the pre-stage dust collecting means is constituted by a cyclone type dust collector.
された排ガス中に飛灰と共に未反応粉末薬剤を吹き込む
吹込ノズルと、この吹込ノズルの上流側に未反応粉末薬
剤を分散させる空気または蒸気を供給する分散ノズルを
配置したことを特徴とする請求項１〜３の何れかに記載
の２段式集塵設備。4. A blowing agent for blowing the unreacted powder chemical together with the fly ash into the exhaust gas disposed in the exhaust gas pipe in the recovered chemical resupply means, and the unreacted powder chemical is dispersed on the upstream side of the blowing nozzle. A two-stage type dust collecting facility according to any one of claims 1 to 3, wherein a dispersion nozzle for supplying air or steam is arranged.
て配置したことを特徴とする請求項２または４記載の２
段式集塵設備。5. The method according to claim 2 or 4, wherein the front-stage filtration chamber and the rear-stage filtration chamber are arranged adjacent to each other on the left and right.
Step type dust collecting equipment.
て配置したことを特徴とする請求項２または４記載の２
段式集塵設備。6. The method according to claim 2, wherein the front-stage filtration chamber and the rear-stage filtration chamber are arranged vertically adjacent to each other.
Step type dust collecting equipment.
次いで後段集塵手段により除塵する２段式集塵設備を使
用して排ガスを除塵するに際し、後段集塵手段である後
段ろ過室の入口で排ガス中にアルカリ性薬剤を吹き込ん
で排ガス中の酸性ガスと反応させ、生成された固形化合
物および未反応粉末薬剤を含む飛灰を後段ろ過室の濾布
で捕集し、回収された飛灰を、再度前段集塵手段の排ガ
ス中に吹き込んで未反応粉末薬剤と酸性ガスとを再度反
応させ、生成された固形化合物を飛灰と共に前段集塵手
段および後段ろ過室の濾布により捕集することを特徴と
する２段式集塵設備による排ガスの除塵方法。7. After removing the exhaust gas by the pre-stage dust collecting means,
Next, when the exhaust gas is removed by using a two-stage type dust collecting equipment that removes dust by the post-stage dust collecting means, an alkaline chemical agent is blown into the exhaust gas at the inlet of the post-stage filtration chamber which is the post-stage dust collecting means to remove the acid gas in the exhaust gas. The fly ash containing the solid compound and the unreacted powder chemicals produced by the reaction is collected by the filter cloth of the latter filtration chamber, and the collected fly ash is blown into the exhaust gas of the former dust collecting means again to form the unreacted powder. A method for removing exhaust gas by a two-stage type dust collecting facility, characterized in that a chemical compound and an acidic gas are reacted again, and the produced solid compound is collected together with fly ash by a front stage dust collecting means and a filter cloth in a rear stage filtration chamber. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27976296A JP3262720B2 (en) | 1995-10-24 | 1996-10-23 | Two-stage dust collection equipment and method of removing exhaust gas with two-stage dust collection equipment |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27461095 | 1995-10-24 | ||
| JP7-274610 | 1995-10-24 | ||
| JP27976296A JP3262720B2 (en) | 1995-10-24 | 1996-10-23 | Two-stage dust collection equipment and method of removing exhaust gas with two-stage dust collection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09173742A true JPH09173742A (en) | 1997-07-08 |
| JP3262720B2 JP3262720B2 (en) | 2002-03-04 |
Family
ID=26551109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27976296A Expired - Fee Related JP3262720B2 (en) | 1995-10-24 | 1996-10-23 | Two-stage dust collection equipment and method of removing exhaust gas with two-stage dust collection equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3262720B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008132424A (en) * | 2006-11-28 | 2008-06-12 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas-treating device and operating method of waste treatment facility equipped with the same |
| JP2008168195A (en) * | 2007-01-10 | 2008-07-24 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas treatment apparatus |
| JP2008289953A (en) * | 2007-05-22 | 2008-12-04 | Takuma Co Ltd | Fly ash supply apparatus, fly ash circulation system, and exhaust gas treatment facility |
| CN103977956A (en) * | 2014-04-29 | 2014-08-13 | 首钢总公司 | Device and method for separating harmful elements such as alkali and zinc elements in dry dedusting ash of blast furnace |
| CN104548826A (en) * | 2014-12-16 | 2015-04-29 | 中国华能集团清洁能源技术研究院有限公司 | Flue gas ultra-clean wet dust collection system of power plant |
| CN106390660A (en) * | 2016-11-18 | 2017-02-15 | 江苏同庆安全科技有限公司 | Deduster having fire-retarding and explosion-inhibiting functions and working method thereof |
| JP6413038B1 (en) * | 2018-02-23 | 2018-10-24 | 株式会社タクマ | Exhaust gas treatment system and exhaust gas treatment method |
| JP2019195786A (en) * | 2018-05-11 | 2019-11-14 | 中部電力株式会社 | Minute dust and fume collection device and polluted air recovery mechanism |
-
1996
- 1996-10-23 JP JP27976296A patent/JP3262720B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008132424A (en) * | 2006-11-28 | 2008-06-12 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas-treating device and operating method of waste treatment facility equipped with the same |
| JP2008168195A (en) * | 2007-01-10 | 2008-07-24 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas treatment apparatus |
| JP2008289953A (en) * | 2007-05-22 | 2008-12-04 | Takuma Co Ltd | Fly ash supply apparatus, fly ash circulation system, and exhaust gas treatment facility |
| CN103977956A (en) * | 2014-04-29 | 2014-08-13 | 首钢总公司 | Device and method for separating harmful elements such as alkali and zinc elements in dry dedusting ash of blast furnace |
| CN104548826A (en) * | 2014-12-16 | 2015-04-29 | 中国华能集团清洁能源技术研究院有限公司 | Flue gas ultra-clean wet dust collection system of power plant |
| CN106390660A (en) * | 2016-11-18 | 2017-02-15 | 江苏同庆安全科技有限公司 | Deduster having fire-retarding and explosion-inhibiting functions and working method thereof |
| JP6413038B1 (en) * | 2018-02-23 | 2018-10-24 | 株式会社タクマ | Exhaust gas treatment system and exhaust gas treatment method |
| JP2019141823A (en) * | 2018-02-23 | 2019-08-29 | 株式会社タクマ | Exhaust gas treatment system and exhaust gas treatment method |
| JP2019195786A (en) * | 2018-05-11 | 2019-11-14 | 中部電力株式会社 | Minute dust and fume collection device and polluted air recovery mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3262720B2 (en) | 2002-03-04 |
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