JP2554686B2 - Chlorine dioxide gas treatment method - Google Patents
Chlorine dioxide gas treatment methodInfo
- Publication number
- JP2554686B2 JP2554686B2 JP63008689A JP868988A JP2554686B2 JP 2554686 B2 JP2554686 B2 JP 2554686B2 JP 63008689 A JP63008689 A JP 63008689A JP 868988 A JP868988 A JP 868988A JP 2554686 B2 JP2554686 B2 JP 2554686B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- chlorine dioxide
- sampling
- added
- reducing agent
- 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
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims description 42
- 239000004155 Chlorine dioxide Substances 0.000 title claims description 21
- 235000019398 chlorine dioxide Nutrition 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 claims description 53
- 238000005070 sampling Methods 0.000 claims description 24
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 8
- 229960002218 sodium chlorite Drugs 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 239000004753 textile Substances 0.000 claims description 4
- 238000002845 discoloration Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 239000000047 product Substances 0.000 description 5
- 238000004061 bleaching Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 1
- FJWLWIRHZOHPIY-UHFFFAOYSA-N potassium;hydroiodide Chemical compound [K].I FJWLWIRHZOHPIY-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は例えば布帛、糸等の繊維製品を連続的に精
錬、漂白するに使用する反応塔又は反応室より排出され
る二酸化塩素を踏む有害ガスの処理方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to chlorine dioxide discharged from a reaction tower or reaction chamber used for continuously refining and bleaching textile products such as cloth and yarn. Regarding the processing method of.
繊維製品を精錬、漂白する従来手段として、亜塩素酸
ソーダの酸活性液を使用しているが、かかる亜塩素酸ソ
ーダを使用した精錬、漂白処理においては亜塩素酸ソー
ダをパッドした繊維製品を反応槽内に供給してスチーミ
ングし、酸活性による分解をして漂白を行なっているも
のであるが、この処理時においてはその亜塩素酸ソーダ
の一部は反応物と反応し中和されるために有毒性を失う
が、その他の多量の亜塩素酸ソーダは蒸気中で分解を
し、有害の二酸化塩素ガスとなる。As a conventional means for refining and bleaching fiber products, an acid active solution of sodium chlorite is used, but in refining and bleaching using such sodium chlorite, fiber products padded with sodium chlorite are used. It is supplied into the reaction vessel, steamed, decomposed by acid activity and bleached, but at the time of this treatment, part of the sodium chlorite is reacted with the reaction product and neutralized. Therefore, it loses its toxicity, but other large amounts of sodium chlorite decompose in steam and become harmful chlorine dioxide gas.
即ち酸活性の亜塩素酸ソーダ溶液で、繊維製品の漂白
加工を行なうときには、有毒である二酸化塩素肺ガスが
多量に発生し、その量は、排出風量20m/minで二酸化塩
素ガス濃度は200PPM〜500PPMに及び、環境排出基準が大
気放出10PPM以下、地上至達時点で0.01PPMであることに
着目すると、排ガス公害の原因ともなる。そこでこの二
酸化塩素を含む排ガスを、公害を防ぐ目的で下記のよう
に、チオ硫酸ソーダ、亜硫酸ソーダ、酸性亜硫酸ソーダ
等の還元剤により、環境排出基準値内となるまで中和し
て大気中に放出している。That is, when bleaching a textile product with an acid-active sodium chlorite solution, a large amount of toxic chlorine dioxide lung gas is generated, and the amount is 20 m / min of discharged air and the chlorine dioxide gas concentration is 200 PPM- If we focus on 500 PPM and the environmental emission standard is 10 PPM or less for atmospheric emission and 0.01 PPM at the time of reaching the ground, it will cause pollution of exhaust gas. Therefore, for the purpose of preventing pollution, the exhaust gas containing chlorine dioxide is neutralized with a reducing agent such as sodium thiosulfate, sodium sulfite, and acidic sodium sulfite as described below until it falls within the environmental emission standard value, and is released into the atmosphere. Is releasing.
8ClO2＋5Na2S2O3＋18NaOH →8NaCl＋10Na2SO4＋9H2O 2ClO2＋5Na2SO3＋2NaOH →2NaCl＋5Na2SO4＋H2O 2ClO2＋5NaHSO3＋7NaOH →2NaCl＋5Na2SO4＋6H2O ところが、還元剤を含む循環液で、二酸化塩素排ガス
中和する従来法では発生ガス量を仮定して、その二酸化
塩素排ガス量に見合う還元剤を予想定量で添加する方法
であるために、通常、二酸化塩素排ガス発生量はpH温
度、濃度生地重量、加工速度の変化に伴って常時約200P
PMから500PPM位まで変動が激しいものであることから、
その発生ガス濃度に追従することができず、時として
は、還元剤の不足に伴ない大気中に放出する二酸化塩素
ガス濃度が異常に高くなったり、また、還元剤が過剰と
なって、該還元剤の無駄が生じる等の不具合を繰返して
いるのが現状である。8ClO 2 ＋ 5Na 2 S 2 O 3 ＋ 18NaOH → 8NaCl ＋ 10Na 2 SO 4 ＋ 9H 2 O 2ClO 2 ＋ 5Na 2 SO 3 ＋ 2NaOH → 2NaCl ＋ 5Na 2 SO 4 ＋ H 2 O 2ClO 2 ＋ 5NaHSO 3 ＋ 7NaOH → 2NaCl ＋ 5Na 2 SO 4 ＋ 6H 2 O In the conventional method of neutralizing chlorine dioxide exhaust gas with a circulating liquid containing chlorine gas, the amount of chlorine dioxide exhaust gas generated is usually assumed because the amount of reducing gas commensurate with the amount of chlorine dioxide exhaust gas is added in an expected amount. Is about 200P constantly with changes in pH temperature, concentration dough weight, and processing speed
Since the fluctuation from PM to 500PPM is severe,
The generated gas concentration cannot be followed, and sometimes the concentration of chlorine dioxide gas released into the atmosphere becomes abnormally high due to the shortage of the reducing agent, or the reducing agent becomes excessive, The current situation is that problems such as waste of the reducing agent are repeated.
本発明は、かかる従来の不具合に着目してなされたも
ので、還元剤を含む循環液を２系列に取り出してサンプ
リングし、その１系列のサンプリング液には、上限指示
液を、他系列のサンプリング液には、下限指示液を添加
して夫々の指示液となし、この双方の指示液の変色度を
光透過センサーで検出して排ガスの中和処理程度を適格
に検知して、中和が未完了である場合は還元剤の添加に
よる再処理で中和が完了された状態で排出することがで
きるようにした二酸化塩素ガスの処理方法を提供するこ
とにある。The present invention has been made by paying attention to such a conventional inconvenience, and the circulating fluid containing a reducing agent is sampled by taking out two series, and the sampling fluid of one series is the upper limit indicator solution and the sampling fluid of another series. The lower limit indicator solution was added to the solution to make each indicator solution.The light transmissive sensor detects the discoloration degree of both of these indicator solutions and the degree of neutralization of exhaust gas is properly detected to neutralize the solution. It is another object of the present invention to provide a method for treating chlorine dioxide gas, which can be discharged in a state where neutralization is completed by reprocessing by adding a reducing agent when it is incomplete.
以下に本発明を図面に示すブロック図を用いて詳細に
説明する。The present invention will be described below in detail with reference to the block diagram shown in the drawings.
１は循環液であって、この循環液１はpH計２によりそ
のpHが計測されて、その循環液１のpHが約10〜11となる
ように、またチオ硫酸ソーダが１〜1.5％含むように制
御回路５によりポンプ３を駆動して、苛性液４を循環液
１中に添加する。かくして調整無色化されている循環液
は、夫々ポンプ61及び62を駆動して、２系列のサンプリ
ング液、即ち上限用サンプリング液71と下限用サンプリ
ング液72として取り出す。次いでその上限用サンプリン
グ液71には、沃度カリ澱粉と、次亜塩素酸ソーダ0.353
％との溶液である青色の上限指示液81をサンプリング液
71と等量添加し、また下限用サンプリング液72には、沃
度カリ澱粉と次亜塩素酸ソーダ0.235％との溶液である
青色の下限指示液82をサンプリング液72と等量添加す
る。そして、上限指示液81を添加した上限用サンプリン
グ液71と、下限指示液82を添加した下限用サンプリング
液72との夫々を光透過センサー９により、その青色度を
検知させ、上限、下限双方のサンプリング液71と72が共
に青色であれば循環液１中に含まれる還元剤の不足であ
り、また、上限、下限双方のサンプリング液71と72が共
に青色が消えていれば還元剤が過剰であり、また、上限
サンプリング液が青色で下限サンプリング液の青色が消
えていれば正常な還元剤量であることが判る。従ってこ
の青色度を不図示の制御回路に供給処理して各サンプリ
ング液の色の度合によって還元剤の供給量を自動コント
ロールするようにしたものであるから、二酸化塩素ガス
の無害化処理が、最少限の還元剤使用量によって有効に
行なえる効果がある。1 is a circulating liquid, and the pH of the circulating liquid 1 is measured by a pH meter 2 so that the pH of the circulating liquid 1 becomes about 10 to 11, and the circulating liquid 1 contains 1 to 1.5% of sodium thiosulfate. Thus, the pump 3 is driven by the control circuit 5 to add the caustic liquid 4 to the circulating liquid 1. Thus, the adjusted colorless circulation liquid is taken out as two series of sampling liquids, that is, upper limit sampling liquid 7 1 and lower limit sampling liquid 7 2 by driving pumps 6 1 and 6 2 , respectively. As to the upper limit for the sampling liquid 71 is then the iodide potassium starch, sodium hypochlorite 0.353
Sampling solution for the blue upper limit indicator solution 8 1
The same amount as 7 1 was added, and for the lower limit sampling liquid 7 2 , the blue lower limit indicator liquid 8 2 which is a solution of potassium iodine starch and sodium hypochlorite 0.235% was equivalent to the sampling liquid 7 2. Added. Then, the upper limit for the sampling liquid 71 with the addition of upper indicator liquid 81, the light transmission sensor 9 respectively of the lower limit indicator liquid 8 2 lower sampling solution 7 2 was added, to detect the blueness, upper If both of the lower limit sampling liquids 7 1 and 7 2 are blue, the reductant contained in the circulating liquid 1 is insufficient, and the upper and lower limit sampling liquids 7 1 and 7 2 are both blue. If it is, the reducing agent is in excess, and if the upper limit sampling liquid is blue and the lower limit sampling liquid is blue, the amount of reducing agent is normal. Therefore, the blueness is supplied to a control circuit (not shown) to automatically control the supply amount of the reducing agent according to the degree of color of each sampling liquid, so that the harmless treatment of chlorine dioxide gas is minimized. There is an effect that can be effectively achieved by the limited amount of reducing agent used.
以上のように本発明は、繊維製品を、亜塩素酸ソーダ
の酸活性液で漂白加工するときに発生する二酸化塩素の
排ガスを還元剤を含む循環液で中和処理する二酸化塩素
ガスの処理方法において、上記循環液を２系列のサンプ
リング液として取り出し、その一方のサンプリング液に
は、上限指示液を、他方のサンプリング液には下限指示
液を添加し、この双方の添加液の変色度を光透過センサ
ーで検知し、それら添加液の変色度に応じて前記循環液
に還元剤を添加することを特徴とする二酸化塩素ガス処
理方法である。INDUSTRIAL APPLICABILITY As described above, the present invention is a method for treating chlorine dioxide gas, which comprises neutralizing an exhaust gas of chlorine dioxide generated when a textile product is bleached with an acid active solution of sodium chlorite with a circulating liquid containing a reducing agent. In above, the circulating liquid is taken out as two series of sampling liquids, the upper limit indicator liquid is added to one of the sampling liquids, and the lower limit indicator liquid is added to the other sampling liquid. The chlorine dioxide gas treatment method is characterized by adding a reducing agent to the circulating liquid according to the degree of discoloration of the added liquid, which is detected by a permeation sensor.
従ってこの発明の処理方法によれば、二酸化塩素排ガ
スを中和せしめるための循環液への還元剤適正付与量
を、その循環液の一部であるサンプル液に指示液を添加
することにより生じる着色変化を見て、その着色が所定
の色状態となるように制御するものであるから、二酸化
塩素ガスの無害化処理が、最少限の還元剤使用量によっ
て有効に行なえる効果がある。Therefore, according to the treatment method of the present invention, the appropriate amount of the reducing agent applied to the circulating liquid for neutralizing the chlorine dioxide exhaust gas is colored by adding the indicator liquid to the sample liquid which is a part of the circulating liquid. Since the change is controlled so that the coloring becomes a predetermined color state, there is an effect that the detoxification treatment of chlorine dioxide gas can be effectively performed with the minimum amount of the reducing agent used.
図面は、本発明による二酸化塩素ガス処理方法の説明図
である。 １……循環液、２……pH計 ３……ポンプ、４……苛性液 ５……制御回路、61,62……ポンプ 71……上限用サンプリング液 72……下限用サンプリング液 81……上限指示液、82……下限指示液 ９……光透過センサーThe drawings are illustrations of the chlorine dioxide gas treatment method according to the present invention. 1 ... Circulating liquid, 2 ... pH meter 3 ... Pump, 4 ... Caustic liquid 5 ... Control circuit, 6 1 , 6 2 ...... Pump 7 1 ...... Upper limit sampling liquid 7 2 ...... Lower limit sampling Liquid 8 1 ...... High limit indicator liquid, 8 2 ...... Lower limit indicator liquid 9 ...... Light transmission sensor
Claims (1)
漂白加工するときに発生する二酸化塩素の排ガスを還元
剤を含む循環液で中和処理する二酸化塩素ガスの処理方
法において、上記循環液を２系列のサンプリング液とし
て取り出し、その一方のサンプリング液には、上限指示
液を、他方のサンプリング液には下限指示液を添加し、
この双方の添加液の変色度を光透過センサーで検知し、
それら添加液の変色度に応じて前記循環液に還元剤を添
加することを特徴とする二酸化塩素ガス処理方法。1. A method for treating chlorine dioxide gas, which comprises neutralizing an exhaust gas of chlorine dioxide generated when a textile product is bleached with an acid active solution of sodium chlorite with a circulating liquid containing a reducing agent. The circulating liquid is taken out as two series of sampling liquids, one of the sampling liquids is added with the upper limit indicator liquid, and the other sampling liquid is added with the lower limit indicator liquid,
The light transmissive sensor detects the discoloration degree of both of these additive liquids,
A chlorine dioxide gas treatment method, characterized in that a reducing agent is added to the circulating liquid according to the degree of color change of the added liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63008689A JP2554686B2 (en) | 1988-01-19 | 1988-01-19 | Chlorine dioxide gas treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63008689A JP2554686B2 (en) | 1988-01-19 | 1988-01-19 | Chlorine dioxide gas treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01184026A JPH01184026A (en) | 1989-07-21 |
| JP2554686B2 true JP2554686B2 (en) | 1996-11-13 |
Family
ID=11699890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63008689A Expired - Lifetime JP2554686B2 (en) | 1988-01-19 | 1988-01-19 | Chlorine dioxide gas treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2554686B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049497A (en) * | 2021-03-12 | 2021-06-29 | 辽宁轻工职业学院 | Supercritical CO of flax roving2Boiling and bleaching self-checking device and method thereof |
-
1988
- 1988-01-19 JP JP63008689A patent/JP2554686B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01184026A (en) | 1989-07-21 |
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