JP6135086B2 - Desulfurization wastewater treatment method - Google Patents
Desulfurization wastewater treatment method Download PDFInfo
- Publication number
- JP6135086B2 JP6135086B2 JP2012223250A JP2012223250A JP6135086B2 JP 6135086 B2 JP6135086 B2 JP 6135086B2 JP 2012223250 A JP2012223250 A JP 2012223250A JP 2012223250 A JP2012223250 A JP 2012223250A JP 6135086 B2 JP6135086 B2 JP 6135086B2
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- wet desulfurization
- cationic polymer
- desulfurization waste
- treatment
- 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.)
- Active
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims description 46
- 230000023556 desulfurization Effects 0.000 title claims description 46
- 238000004065 wastewater treatment Methods 0.000 title description 5
- 229920006317 cationic polymer Polymers 0.000 claims description 29
- 239000002351 wastewater Substances 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000005909 Kieselgur Substances 0.000 claims description 9
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 7
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000011085 pressure filtration Methods 0.000 claims description 2
- -1 magnesium hydroxide sulfur oxide Chemical compound 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 150000002681 magnesium compounds Chemical class 0.000 description 7
- 238000007792 addition Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 208000005156 Dehydration Diseases 0.000 description 3
- 229920006318 anionic polymer Polymers 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
- 239000000347 magnesium hydroxide Substances 0.000 description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical group CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 2
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 2
- 229920006322 acrylamide copolymer Polymers 0.000 description 2
- 230000004931 aggregating effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000003839 salts Chemical group 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
本発明は、硫黄酸化物を含んだ排ガスをマグネシウム化合物、水酸化ナトリウム又はアンモニアなどの吸収剤を用いて湿式脱硫処理する際に生じる湿式脱硫排水を処理する方法に係り、特に湿式脱硫排水に濾過助剤を添加して濾過する工程を有する湿式脱硫排水の処理方法に関する。 The present invention relates to a method for treating a wet desulfurization wastewater generated when an exhaust gas containing sulfur oxide is subjected to a wet desulfurization treatment using an absorbent such as a magnesium compound, sodium hydroxide, or ammonia. The present invention relates to a method for treating wet desulfurization effluent having a step of adding an auxiliary and filtering.
焼却炉やボイラ等の燃焼設備からの排ガスを脱硫処理する湿式排煙脱硫装置では、ＳＯＸ除去のために水酸化ナトリウム、アンモニア、または水酸化マグネシウムなどの吸収剤が使用され、湿式脱硫排水が生じる。水酸化マグネシウムを使用する場合、ＭｇＳＯ３、Ｍｇ（ＨＳＯ３）２、ＭｇＳＯ４等を含んだ湿式脱硫排水が生じる。 In the wet flue gas desulfurization apparatus for desulfurizing exhaust gas from combustion equipment of incinerators and boilers, etc., sodium hydroxide for SO X removal, ammonia or absorption agents such as magnesium hydroxide, it is used, the wet desulfurization effluent Arise. When magnesium hydroxide is used, wet desulfurization waste water containing MgSO 3 , Mg (HSO 3 ) 2 , MgSO 4 and the like is generated.
この湿式脱硫排水は、ＣＯＤ処理及びＳＳ除去処理が施される。ＣＯＤ処理は、廃液の化学的酸素要求量ＣＯＤを低減するものである。ＣＯＤ成分がＭｇＳＯ３の場合、下記式のように、空気と接触させ酸化することによってＣＯＤ低減を行う。
ＭｇＳＯ３＋１／２Ｏ２→ＭｇＳＯ４
This wet desulfurization waste water is subjected to COD treatment and SS removal treatment. The COD treatment reduces the chemical oxygen demand COD of the waste liquid. When the COD component is MgSO 3, the COD is reduced by contacting with air and oxidizing as in the following formula.
MgSO 3 + 1 / 2O 2 → MgSO 4
ＳＳ除去処理としては濾過が行われ、この際、脱硫排水に珪藻土等の濾過助剤を添加することがある（特許文献１の０００４段落）。しかしながら、濾過助剤を添加すると、濾過効率は向上するが、スラッジ量が多くなる。 Filtration is performed as the SS removal treatment, and at this time, a filter aid such as diatomaceous earth is sometimes added to the desulfurization drainage (paragraph 0004 of Patent Document 1). However, when a filter aid is added, the filtration efficiency is improved, but the amount of sludge is increased.
特許文献１には、スラッジ量の少ない湿式脱硫排水処理方法として、湿式脱硫排水にアニオン性高分子凝集剤を添加して沈降分離処理し、沈降相に対しカチオン性高分子凝集剤を添加し、脱水処理することが記載されている。 In Patent Document 1, as a wet desulfurization wastewater treatment method with a small amount of sludge, an anionic polymer flocculant is added to the wet desulfurization wastewater and subjected to precipitation separation, and a cationic polymer flocculant is added to the precipitated phase. Dehydration is described.
特許文献１の脱硫排水の処理方法では、アニオン性高分子凝集剤を添加して沈降分離し、その後沈降相にカチオン性高分子凝集剤を添加するという複数工程を経てから脱水処理を行うため、濾過助剤は不要であるものの、脱水の前処理に手間がかかる。 In the desulfurization wastewater treatment method of Patent Document 1, an anionic polymer flocculant is added and subjected to sedimentation separation, and then the dehydration treatment is performed after a plurality of steps of adding the cationic polymer flocculant to the precipitated phase. Although a filter aid is not required, it takes time to perform pretreatment for dehydration.
本発明は、濾過助剤の使用量が少なく、しかも効率よく湿式脱硫排水を処理することができる脱硫排水の処理方法を提供することを目的とする。 An object of this invention is to provide the processing method of the desulfurization waste_water | drain which can process the wet desulfurization waste_water | drain efficiently with little usage-amount of a filter aid.
本発明の脱硫排水の処理方法は、吸収剤を用いた湿式脱硫排水の処理方法において、湿式脱硫排水に濾過助剤を添加するとともに、カチオン性ポリマーを添加し、その後濾過処理することを特徴とするものである。 The treatment method of desulfurization waste water of the present invention is characterized in that, in the treatment method of wet desulfurization waste water using an absorbent, a filter aid is added to the wet desulfurization waste water, a cationic polymer is added, and then the filtration treatment is performed. To do.
カチオン性ポリマーとしては、重量平均分子量が１，０００〜１，０００，０００であり、ｐＨ４におけるコロイド当量値が０．５〜１８ｍｅｑ／ｇであるものが好ましい。また、カチオン性ポリマーとしては、５％水溶液の２５℃における粘度が２０ｍＰ・Ｓ以下であるものが好ましい。 As the cationic polymer, those having a weight average molecular weight of 1,000 to 1,000,000 and a colloid equivalent value at pH 4 of 0.5 to 18 meq / g are preferable. The cationic polymer is preferably a 5% aqueous solution having a viscosity at 25 ° C. of 20 mP · S or less.
本発明では、カチオン性ポリマーを５〜１００ｍｇ／Ｌ添加することが好ましい。 In the present invention, it is preferable to add 5 to 100 mg / L of the cationic polymer.
本発明では、硫黄酸化物の吸収剤としてマグネシウム化合物、水酸化ナトリウム及び／又はアンモニア等の吸収剤を用いた湿式脱硫排水に対し、濾過助剤とカチオン性ポリマーとを添加して濾過処理を行う。このカチオン性ポリマーを添加することにより、濾過助剤の添加量を少なくしても濾過効率が向上する。 In the present invention, filtration treatment is performed by adding a filter aid and a cationic polymer to wet desulfurization effluent using an absorbent such as a magnesium compound, sodium hydroxide and / or ammonia as a sulfur oxide absorbent. . By adding this cationic polymer, the filtration efficiency is improved even if the amount of filter aid added is reduced.
湿式脱硫排水中には、懸濁物質として、マグネシウム塩等の吸収剤の硫酸塩とともに、塵埃や土砂成分などが含まれている。そのため部分的に懸濁粒子に表面はマイナスに帯電している。この湿式脱硫排水にカチオン性ポリマーを添加すると、凝集作用が生じて、緻密なフロックが形成され、濾過促進に寄与すると考えられる。このようなことから、本発明によると、濾過助剤の使用量を少なくすることができ、生成するスラッジ量も減少する。 In the wet desulfurization waste water, dust, earth and sand components, etc. are contained as a suspended substance together with the sulfate of the absorbent such as magnesium salt. Therefore, the surface of the suspended particles is partially charged negatively. When a cationic polymer is added to this wet desulfurization effluent, it is considered that a coagulation action occurs and a dense floc is formed, contributing to the promotion of filtration. For this reason, according to the present invention, the amount of filter aid used can be reduced, and the amount of sludge produced is also reduced.
本発明では、湿式脱硫排水に濾過助剤とカチオン性ポリマーを添加した後、濾過処理すればよく、工程数が少なく、また各工程の操作も容易である。 In the present invention, after adding a filter aid and a cationic polymer to wet desulfurization effluent, it may be filtered, the number of steps is small, and the operation of each step is easy.
以下、本発明についてさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
本発明が処理対象とする湿式脱硫排水は、焼却炉、ボイラ等の焼却設備から排出される硫黄酸化物含有排ガスをマグネシウム化合物、水酸化ナトリウム及び／又はアンモニア等の吸収剤によって湿式脱硫処理することにより生じる排水である。マグネシウム化合物を水に分散させ、この分散液をスプレーして硫黄酸化物と接触させることにより硫黄酸化物を脱硫することが好ましい。 The wet desulfurization wastewater to be treated by the present invention is a wet desulfurization treatment of sulfur oxide-containing exhaust gas discharged from incinerators such as incinerators and boilers with absorbents such as magnesium compounds, sodium hydroxide and / or ammonia. It is the drainage produced by. It is preferred to desulfurize the sulfur oxide by dispersing the magnesium compound in water and spraying this dispersion to contact the sulfur oxide.
マグネシウム化合物としては、好ましくは水酸化マグネシウム及び／又は酸化マグネシウムが用いられる。この湿式脱硫排水は、硫黄酸化物との反応によって生じたＭｇＳＯ３、Ｍｇ（ＨＳＯ３）２、ＭｇＳＯ４等を含有する。 As the magnesium compound, magnesium hydroxide and / or magnesium oxide is preferably used. This wet desulfurization waste water contains MgSO 3 , Mg (HSO 3 ) 2 , MgSO 4 and the like generated by reaction with sulfur oxides.
本発明では、この湿式脱硫排水に対し濾過助剤とカチオン性ポリマーとを添加する。濾過助剤とカチオン性ポリマーとの添加順序は同時でもよく、いずれか一方を先に添加し、他方を後から添加してもよい。 In the present invention, a filter aid and a cationic polymer are added to this wet desulfurization waste water. The order of addition of the filter aid and the cationic polymer may be the same, either one may be added first, and the other may be added later.
濾過助剤としては、珪藻土、パーライトなどを用いることができるが、珪藻土が好適である。 As the filter aid, diatomaceous earth, perlite, etc. can be used, but diatomaceous earth is preferred.
カチオン性ポリマーとしては、重量平均分子量が１，０００〜１，０００，０００特に１，０００〜２００，０００であり、ｐＨ４におけるコロイド当量値が０．５〜１８ｍｅｑ／ｇ特に４〜１０ｍｅｑ／ｇであるものが好適である。また、２５℃における５％水溶液の粘度が２０ｍＰａ・Ｓ以下、特に１０ｍＰａ・Ｓ以下、例えば１〜１０ｍＰａ・Ｓのものが好適である。カチオン性ポリマーとしては、ジメチルアミン−エピクロロヒドリン共重合体、ポリエチレンイミン、ポリジアリルジメチルアンモニウムクロライド、ジメチルアミノエチルアクリレート四級塩又はジメチルアミノエチルメタクリレート四級塩の単独重合体、ジメチルアミノエチルアクリレート四級塩−アクリルアミド共重合体、ジメチルアミノエチルメタクリレート四級塩−アクリルアミド共重合体、ジシアンジアミド・ホルマリン縮合物、メラミン・ホルマリン縮合物などが好適である。 The cationic polymer has a weight average molecular weight of 1,000 to 1,000,000, particularly 1,000 to 200,000, and a colloid equivalent value at pH 4 of 0.5 to 18 meq / g, particularly 4 to 10 meq / g. Some are preferred. Moreover, the viscosity of a 5% aqueous solution at 25 ° C. is preferably 20 mPa · S or less, particularly 10 mPa · S or less, for example, 1 to 10 mPa · S. As cationic polymers, dimethylamine-epichlorohydrin copolymer, polyethyleneimine, polydiallyldimethylammonium chloride, dimethylaminoethyl acrylate quaternary salt or dimethylaminoethyl methacrylate quaternary salt homopolymer, dimethylaminoethyl acrylate A quaternary salt-acrylamide copolymer, a dimethylaminoethyl methacrylate quaternary salt-acrylamide copolymer, a dicyandiamide / formalin condensate, a melamine / formalin condensate and the like are preferable.
カチオン性ポリマーの添加量は５〜１００ｍｇ／Ｌ特に５〜３０ｍｇ／Ｌ程度が好ましい。添加量が過度に少ないと、濾過特性の改善が不十分となり、添加量が過度に多いとコスト高である。 The addition amount of the cationic polymer is preferably about 5 to 100 mg / L, particularly about 5 to 30 mg / L. If the addition amount is excessively small, the filtration characteristics are not sufficiently improved, and if the addition amount is excessively large, the cost is high.
本発明では、湿式脱硫排水に無機凝集剤やアニオン性高分子凝集剤を添加してもよいが、通常はこれらの添加は不要である。 In the present invention, an inorganic flocculant or an anionic polymer flocculant may be added to the wet desulfurization effluent, but usually these additions are unnecessary.
濾過助剤及びカチオン性ポリマーを添加した後の濾過装置としては、キャンドル型加圧濾過装置やフィルタープレスなどの各種の濾過装置を用いることができる。 As a filtration device after adding the filter aid and the cationic polymer, various filtration devices such as a candle type pressure filtration device and a filter press can be used.
以下、本発明の処理方法の好適なフローについて図１を参照して説明する。 Hereinafter, a preferred flow of the processing method of the present invention will be described with reference to FIG.
排ガスが吸収塔１を通過し、この吸収塔１においてマグネシウム化合物の分散液が散布され、硫黄酸化物がマグネシウム化合物と反応して吸収され、ＭｇＳＯ３、Ｍｇ（ＨＳＯ３）２、ＭｇＳＯ４等を含む湿式脱硫排水が生じる。この湿式脱硫排水が酸化塔２に導入され、空気吹き込みによってＭｇＳＯ３、Ｍｇ（ＨＳＯ３）２がＭｇＳＯ４に酸化される。この実施の形態では酸化塔２に濾過助剤が添加され、撹拌混合される。酸化塔２内の液は、配管３及びポンプＰを介して濾過装置４に供給され、濾過処理され、脱水ケーキと清澄な処理水とに分離される。この実施の形態では、配管３のポンプＰの前段側にカチオン性ポリマーが添加されるが、酸化塔２に添加されてもよい。
The exhaust gas passes through the absorption tower 1, and a dispersion of magnesium compound is sprayed in the absorption tower 1, the sulfur oxide reacts with the magnesium compound and is absorbed, and MgSO 3 , Mg (HSO 3 ) 2 , MgSO 4, etc. Contains wet desulfurization effluent. This wet desulfurization effluent is introduced into the
以下実施例及び比較例について説明する。 Examples and comparative examples will be described below.
以下の実施例及び比較例で用いた湿式脱硫排水はＣＯボイラ設備から生じたものであり、下記の水質を有する。
ｐＨ：６．１
濁度：２９５０度
ＳＳ：８７００ｍｇ／Ｌ
強熱減量／ＳＳ：３．８％
電導度：１５４０ｍＳ／ｍ
外観：茶色
The wet desulfurization effluent used in the following examples and comparative examples is generated from a CO boiler facility and has the following water quality.
pH: 6.1
Turbidity: 2950 degrees SS: 8700 mg / L
Loss on ignition / SS: 3.8%
Conductivity: 1540 mS / m
Appearance: Brown
実施例では、表１に示すカチオン性ポリマーＡ〜Ｈを用いた。粘度の測定温度は２５℃である。 In Examples, cationic polymers A to H shown in Table 1 were used. The temperature at which the viscosity is measured is 25 ° C.
＜凝集試験＞
ジャーテスタを用いて上記カチオン性ポリマーＡ〜Ｈを表２に示す添加量にて上記湿式脱硫排水に添加し、２分撹拌し、静置５分後の上澄み濁度を測定した。また、凝集撹拌時に液を一部採取してＣＳＴ（Ｃａｐｉｌｌａｒｙ Ｓｕｃｔｉｏｎ Ｔｉｍｅ（毛管吸引時間））値をＣＳＴ試験装置（ＴＯＲＩＴＯＮ製）によって測定した。また、対比のためにカチオン性ポリマーを全く添加しない湿式脱硫排水についても同様の測定を行った。結果及び評価を表２に示す。
<Aggregation test>
Using a jar tester, the cationic polymers A to H were added to the wet desulfurization wastewater in the addition amounts shown in Table 2, stirred for 2 minutes, and the supernatant turbidity after 5 minutes of standing was measured. Further, a part of the liquid was collected at the time of agitation and the CST (Capillary Suction Time) value was measured with a CST test apparatus (manufactured by TORITON). For comparison, the same measurement was performed on wet desulfurization waste water to which no cationic polymer was added. The results and evaluation are shown in Table 2.
表２より、Ａ，Ｂ，Ｃ，Ｄ，Ｅのカチオン性ポリマーが良好な凝集作用を有し、Ｆのカチオン性ポリマーが次に良好な凝集作用を有することが認められた。 From Table 2, it was confirmed that the cationic polymers of A, B, C, D, and E had a good aggregating action, and the cationic polymer of F had the next best aggregating action.
＜湿式脱硫排水処理試験＞
そこで、カチオン性ポリマーＡ〜Ｆを用いて湿式脱硫排水処理試験を行った。
<Wet desulfurization wastewater treatment test>
Therefore, a wet desulfurization wastewater treatment test was performed using the cationic polymers A to F.
即ち、上記湿式脱硫排水６０Ｌに対し珪藻土７００ｍｇ／Ｌを添加し、２分撹拌して分散させた後、カチオン性ポリマーを１０ｍｇ／Ｌ添加して２分撹拌した。その後、各排水を試験用フィルタープレス（日鉄環境エンジニアリング（株）製）に圧入圧力０．２ＭＰａにて圧入し、濾過速度及び脱水ケーキ含水率を測定した。対比のために珪藻土及びカチオン性ポリマーを全く添加しない比較例１と、珪藻土のみ２０００ｍｇ／Ｌ添加した比較例２について同様の試験を行った。 That is, 700 mg / L of diatomaceous earth was added to 60 L of the wet desulfurization wastewater, and the mixture was stirred for 2 minutes to be dispersed, and then 10 mg / L of a cationic polymer was added and stirred for 2 minutes. Thereafter, each drainage was press-fitted into a test filter press (manufactured by Nippon Steel Environmental Engineering Co., Ltd.) at a press-fitting pressure of 0.2 MPa, and a filtration rate and a dehydrated cake moisture content were measured. For comparison, a similar test was performed for Comparative Example 1 in which no diatomaceous earth and a cationic polymer were added and Comparative Example 2 in which only diatomaceous earth was added at 2000 mg / L.
なお、フィルタープレスによる濾過は、濾液流出速度が１０ｍＬ／ｍｉｎ以下になった時点で停止した。結果を表３に示す。 The filtration with a filter press was stopped when the filtrate outflow rate became 10 mL / min or less. The results are shown in Table 3.
表３の通り、実施例１〜６によると、珪藻土のみを多量に添加する比較例２の場合の約１／３の珪藻土添加量にて、比較例２と同等の優れた濾過処理を行うことができる。 As shown in Table 3, according to Examples 1 to 6, an excellent filtration treatment equivalent to that of Comparative Example 2 is performed with about 1/3 of the amount of diatomaceous earth added in Comparative Example 2 in which only a large amount of diatomaceous earth is added. Can do.
１ 吸収塔
２ 酸化塔
４ 濾過装置
1
Claims (6)
湿式脱硫排水に濾過助剤を添加するとともに、カチオン性ポリマーを添加し、その後濾過処理する方法であって、
該カチオン性ポリマーの５％水溶液の２５℃における粘度が２０ｍＰ・Ｓ以下であることを特徴とする脱硫排水の処理方法。 In the treatment method of wet desulfurization wastewater generated by wet desulfurization treatment of exhaust gas containing sulfur oxide with an absorbent,
A method of adding a filter aid to wet desulfurization wastewater, adding a cationic polymer, and then performing a filtration treatment ,
A method for treating desulfurization waste water, wherein the 5% aqueous solution of the cationic polymer has a viscosity of 20 mP · S or less at 25 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012223250A JP6135086B2 (en) | 2012-10-05 | 2012-10-05 | Desulfurization wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012223250A JP6135086B2 (en) | 2012-10-05 | 2012-10-05 | Desulfurization wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014073473A JP2014073473A (en) | 2014-04-24 |
| JP6135086B2 true JP6135086B2 (en) | 2017-05-31 |
Family
ID=50748078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012223250A Active JP6135086B2 (en) | 2012-10-05 | 2012-10-05 | Desulfurization wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6135086B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019008822A1 (en) * | 2017-07-04 | 2019-01-10 | オルガノ株式会社 | Water treatment method and water treatment device |
| CN117486337B (en) * | 2023-12-15 | 2024-08-02 | 北京宝莱尔科技有限公司 | Water treatment agent and preparation method thereof |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5064165A (en) * | 1973-10-11 | 1975-05-31 | ||
| JPS5325058A (en) * | 1976-08-19 | 1978-03-08 | Kiyoharu Watanabe | Treating method for purifying sewage |
| JPS5332957A (en) * | 1976-09-07 | 1978-03-28 | Tokico Ltd | Treatment of wastewater and apparatus therefor |
| GR79057B (en) * | 1982-09-24 | 1984-10-02 | Blue Circle Ind Plc | |
| JPH08281275A (en) * | 1995-04-10 | 1996-10-29 | Honshu Paper Co Ltd | Improvement of method for flocculating, settling and removing substance incorporated in coating material waste water |
| JP2000176241A (en) * | 1998-12-11 | 2000-06-27 | Fujikasui Engineering Co Ltd | Treatment of fluoride ions in waste water in stack gas desulfurization |
| JP2001224906A (en) * | 2000-02-17 | 2001-08-21 | Tosoh Corp | Method for reducing volume of sludge from wastewater after treatment of flue gas |
| JP2003010862A (en) * | 2001-07-06 | 2003-01-14 | Toshiji Nibe | Method for concentration, dehydration, and drying of excretion |
| JP2003299906A (en) * | 2002-04-08 | 2003-10-21 | Tosoh Corp | Cationic high-molecular flocculant and sludge treatment method using the same |
| CN1965072B (en) * | 2004-05-18 | 2011-06-29 | 英博有限公司 | Method of preparing a liquid, containing proteins for subsequent separation, by using one or more protein-complexing agents |
| WO2006056222A1 (en) * | 2004-11-26 | 2006-06-01 | Ashland Licensing And Intellectual Property Llc. | Method for separating solids from gas washers |
| JP2007021296A (en) * | 2005-07-12 | 2007-02-01 | Nihon Hels Industry Corp | Sludge dehydration method |
| JP2007038177A (en) * | 2005-08-05 | 2007-02-15 | Nicca Chemical Co Ltd | Waste-water treatment agent and waste-water treatment method |
| JP5218180B2 (en) * | 2009-03-16 | 2013-06-26 | 東ソー株式会社 | Method for collecting sludge from flue gas wastewater |
| JP5295178B2 (en) * | 2010-06-07 | 2013-09-18 | 太平産業株式会社 | Muddy water treatment method |
-
2012
- 2012-10-05 JP JP2012223250A patent/JP6135086B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014073473A (en) | 2014-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103288236B (en) | Treatment method for salt-containing wastewater | |
| JP5364298B2 (en) | Dispersant-containing water treatment method | |
| JP7166795B2 (en) | Method for treating wastewater containing COD components | |
| JP5621260B2 (en) | Wastewater coagulation method | |
| JP6969076B2 (en) | Purifying agent for heavy metal-containing aqueous solution, and method for purifying heavy metal-containing aqueous solution | |
| JP2009195775A (en) | Flocculation and sedimentation treatment method | |
| RU2009122374A (en) | METHOD FOR HANDLING Sludge | |
| JP5659487B2 (en) | Wastewater coagulation method | |
| JP5621256B2 (en) | Wastewater coagulation method | |
| JP6135086B2 (en) | Desulfurization wastewater treatment method | |
| JP2009154095A (en) | Water treatment method | |
| CN105384279B (en) | A kind of processing system and processing method of the waste water that SCR denitration regeneration generates | |
| JP6738492B2 (en) | Water treatment method and water treatment device | |
| JP5501544B1 (en) | Flocculant for wastewater treatment | |
| JP6744526B2 (en) | Wastewater treatment method and wastewater treatment agent | |
| TW201213242A (en) | Flocculating agent for waste water treatment and method of using thereof | |
| CN107857434A (en) | A kind of handling process of wet flue gas desulfurization waste water | |
| JP2011131165A (en) | Treatment method for inorganic substance-suspended waste water | |
| JP4457027B2 (en) | Disposal water treatment method | |
| JP2018043232A (en) | Purification agent for mercury-containing aqueous solution, and method of purifying mercury-containing aqueous solution | |
| JP2019076840A (en) | Purification agent for heavy metal-containing aqueous solution, and method for purifying heavy metal-containing aqueous solution | |
| CN107935248B (en) | Oil gas field waste water treatment process | |
| JP2009142761A (en) | Water treatment method | |
| JP2010075928A (en) | Treatment method and treatment device for fluorine-containing waste water | |
| CN110577254A (en) | water purifying agent for coal chemical industry, coking chemical industry and other chemical industries and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20150716 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20160425 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160510 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160705 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160927 |
|
| A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20161124 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20170112 |
|
| 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: 20170328 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170410 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6135086 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |