KR960013331B1 - Dyeing waste water treatment method - Google Patents

Dyeing waste water treatment method Download PDF

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KR960013331B1
KR960013331B1 KR1019930018106A KR930018106A KR960013331B1 KR 960013331 B1 KR960013331 B1 KR 960013331B1 KR 1019930018106 A KR1019930018106 A KR 1019930018106A KR 930018106 A KR930018106 A KR 930018106A KR 960013331 B1 KR960013331 B1 KR 960013331B1
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dye
dyeing
treatment
water
wastewater
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KR940006926A (en
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요시테루 산도
에이이치 나카노
히로시 이시도로시
코우지 산도
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가부시기가이샤 산도텟코쇼
요시테루 산도
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/308Dyes; Colorants; Fluorescent agents

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Removal Of Specific Substances (AREA)
  • Coloring (AREA)

Abstract

내용 없음.No content.

Description

염색폐액처리방법Dyeing Waste Treatment Method

제 1도는, 본 발명의 실시예의 흐름도.1 is a flowchart of an embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 염색포(포(布)) 세정조 2 : 반응처리조1: Dye cloth washing tank 2: Reaction treatment tank

3 : 고액분리탈수기 4 : 탈색조3: solid-liquid separation dehydrator 4: decolorization tank

5 : 소각로 6 : 패가스5: incinerator 6: lost gas

7 : 가성소다 항유 배액(排液) 8 : 중화조7: caustic soda drainage 8: neutralization tank

본 발명은, 특히 섬유포백의 염색가공시에 있어서의 세정처리공정에서 발생하는 착색폐액의 색소를 분리 탈색해서 재사용가능한 무색의 수액(水液)으로 하기 위한 영색폐액의 처리방법에 관한 것이다.The present invention relates to a method for treating a colorless waste solution for separating and discoloring the pigment of the colored waste liquid generated in the washing treatment step during dyeing processing of textile fabrics, in order to obtain a colorless sap that can be reused.

공업적으로 가공생산되는 포백등의 섬유제품의 가공공정은, 털태우기, 풀빼기, 정련, 표백, 실켓을 포함한 준비공정과, 침염(寢染), 날염등에 의한 염색공정과, 마무리공정으로 대별되며, 이 전체가공공정에서 소비되는 물의 양은, 가공해야 할 섬유포백중량의 약 100∼150배이고, 또 상기 염색공정에서 사용되는 소비물의 양은, 섬유포백중량리 약 5배이며, 예를들면, 200g/m의 포백을 100m/분의 속도로 세정하면 0.2×100×60×5= 6ton/시간의 염색폐수가 발생하는 것으로 된다.The processing process of textile products such as fabrics, which are industrially processed and produced, is roughly divided into preparatory processes including hair-burning, pull-out, refining, bleaching and sealing, dyeing processes by dyeing and printing, and finishing processes. The amount of water consumed in the whole processing step is about 100 to 150 times the weight of the fiber cloth to be processed, and the amount of the consumed material used in the dyeing step is about 5 times the fiber bag weight, for example, 200 g. Washing fabrics at / m at a rate of 100 m / min produces 0.2 x 100 x 60 x 5 = 6 tons / hour dyeing wastewater.

이와같이 종래의 영색처리공정에 있어서는, 다량의 수자원이 소비되는 동시에, 이 착색처리폐수를 하천에 방류하므로서 공해를 초래한다고 하는 불편이 있었다.As described above, in the conventional zero-color treatment step, a large amount of water resources are consumed, and there is an inconvenience in that pollution is caused by discharging the colored treatment wastewater into the river.

이 불편을 해소하기 위하여 염색처리공정으로부터 폐출되는 착색수에, 특별한 약제를 사용해서 탈색하여 방류하는 것도 고려되고 있으나, 이 경우의 염료패수의 탈색처리는, 염료색소를 함유하지 않는 일반폐수도 종합해서 응집처리하고 있기 때문에, 염료농도가 회석되어 있으며, 이것이 원인으로 응집효과가 떨어지고, 또 응집약제도 몰비보다도 욕비(浴比)의 비중쪽이 크기 때문에, 응십제의 소비량이 커진다. 또 염료가 희석되어 있기 때문에, 탈색율도 90% 전후로 저하하므로, 여액(濾液)에 잔류하는 10%의 미탈색염료는, 2차 탈색처리에 의해 산화분해, 활성탄 흡착처리등의 2차 처리를 가하지 않으면 안되고, 탈색처리를 위한 경제성이 나쁘다고 하는 문제점이 있었다.In order to alleviate this inconvenience, it is also considered to discolor and discharge the colored water discharged from the dyeing process by using a special chemical agent. However, in this case, the decolorization treatment of the dye wastewater also includes general wastewater containing no dye pigment. In this case, the dye concentration is dilute, and the aggregation effect is reduced due to this, and the coagulant agent also has a larger specific gravity of the bath ratio than the molar ratio, so that the consumption of the coagulant is increased. In addition, because the dye is diluted, the decolorization rate is also reduced to around 90%, so that 10% of the decolorized dye remaining in the filtrate is not subjected to secondary treatment such as oxidative decomposition and activated carbon adsorption treatment by secondary decolorization. There has been a problem that the economics for decoloring treatment have to be poor.

본 발명은, 이러한 종래의 문제점에 착안해서 이루어진 겻으로서, 섬유포백의 가공처리공정에서 발생하는 폐수를, 염료함유 폐수와, 염료비함유 폐수로 분별하여, 그 염료폐수만을, 섬유포백의 아염소산소다에 의한 표백처리공정에서 발생하는 폐가스 즉 2산화염소가스를 사용해서 산화탈색하고, 이에 의해 무색수의 재생수로 해서 재이용할 수 있는 경제성, 자원절약에 유리한 염색폐액처리방법을 제공하는 것이다.The present invention has been made in view of such a conventional problem, and the wastewater generated in the processing step of fabric bag is classified into dye-containing waste water and dye-free waste water, and only the dye waste water is chlorochloric acid in the fiber cloth. The present invention provides a method for treating waste dyes, which is economical and resource-saving, which can be oxidized and decolorized using waste gas generated in a bleaching process using soda, that is, chlorine dioxide gas, and reused as colorless water.

이하에, 본 발명을 제 1도에 표시한 흐름도에 의거해서 상세히 설명한다.EMBODIMENT OF THE INVENTION Below, this invention is demonstrated in detail based on the flowchart shown in FIG.

(1)은 침염, 날염등에 의한 염색공정에 이어서 설치되어 있는 염색포 세정조이며, 이 염색포 세정조(1)로 부터 폐출되는 염료함유 폐수는, 반응처리조(2)내에 공급되고, 이 반응처리조(2)내에서 응집제와 흔합교반된다. 여기서 사용되는 응집제로서는, 예를들면 무기의 알루미늄염 또는 철염과, 고분자 응집제와의 흔합 응집제를 사용한다.(1) is a dyeing cloth washing tank provided following a dyeing process by dyeing, printing, etc., and dye-containing wastewater discharged from the dyeing cloth washing tank (1) is supplied into the reaction treatment tank (2). It is mixed and stirred with the flocculant in the treatment tank 2. As a flocculant used here, the mixed flocculant of inorganic aluminum salt or iron salt, and a polymeric flocculant is used, for example.

반응처리조(2)내의 염료함유 폐수는, 상기 응집제의 첨가에 의해 흙탕(泥) 형상물이 생성되기 때문에, 이 흙탕 형상물 흔합액을 고액분리탈수기(3)에 의해 흙탕 헝상물을 분리시키고, 그 분리수만을 탈색조(4)내에 공급한다. 또 분리된 흙탕 형상물은 소각로(5)등에 공급해서 소각한다.In the dye-containing wastewater in the reaction treatment tank 2, since the muddy substance is produced by the addition of the flocculant, the muddy substance mixture liquid is separated by the solid-liquid separation dehydrator 3, and the muddy substance is separated. Only the separated water is supplied into the decolorization tank 4. In addition, the separated muddy object is supplied to an incinerator 5 or the like to be incinerated.

탈색조(4)내에 공급된 착색분리수(pH4)에는, 아염소산소다에 의한 섬유포백의 표면처리공정으로부터 발생하는 2산화염소의 폐가스(6)이 첨가되고, 이에 의해서 탈색된다.The waste gas 6 of chlorine dioxide generated from the surface treatment step of the fiber cloth with sodium chlorite is added to the colored separation water pH 4 supplied in the decolorization tank 4, thereby decolorizing.

즉, 섬유포백의 표백공정인 아염소산소다의 산활성 표백시에 발생하는 2산화염소가스의 폐가스량은, 풍량 (風量) 20m3/분일때 300ppm이며, 이 가스량은, 2산화염소 고형 환산하면 18g/분으로 되고, 이 폐가스는 유해하므로, 종래에 있어서는, 예를들면 8C1O2+5Na2S2O3+18NaOH→8NaOH→8NaCl+10Na2SO4+9H2O와 같이 무해의 염화나트륨과 황산나트륨으로 하는 방법. 또는 H2O2와 NaOH용액에 흡수시켜서 원래의 NaClO2로 해서 대기중에 나가지 않도록 하는 (2ClO2+H2O2+2NaOH→2NaClO2+2H2O+O2) 방책이 세워져 있다.In other words, the amount of waste gas of chlorine dioxide gas generated during acid activity bleaching of sodium chlorite, which is a bleaching process of fiber cloth, is 300 ppm when the air volume is 20 m 3 / min. and a 18g / min, since the waste gas is harmful, in the prior art, for example as harmless sodium chloride and sodium sulfate as 8C1O 2 + 5Na 2 S 2 O 3 + 18NaOH → 8NaOH → 8NaCl + 10Na 2 SO4 + 9H 2 O How to. Or (2ClO 2 + H 2 O 2 + 2NaOH → 2NaClO 2 + 2H 2 O + O 2 ) measures have been established to absorb in H 2 O 2 and NaOH solution so as not to leave the atmosphere as the original NaClO 2 .

본 발명은 이 표백처리공정에 있어서, 발생하는 2산화염소가스를 사용해서 염료폐수중에 함유되어 있는 염료의 산화탈색을 행하려고 하는 것으로서, 이에 의해 사용약품의 경제성을 높이고, 또한, 유해가스의 무해화 처리의 필요성을 해소하여 관리의 경제성과 용이성을 높이고, 나아가서는 수자원의 절약에 기여할 수 있는 방법이다.The present invention intends to oxidatively decolorize the dye contained in the dye wastewater by using the generated chlorine dioxide gas in this bleaching treatment step, thereby improving the economical efficiency of the chemicals used, and also causing no harmful gases. By eliminating the need for wastewater treatment, it is possible to increase the economics and ease of management, and further contribute to the saving of water resources.

상기 탈색조(4)에서 탈색된 무색수는, 중화조(8)내에 공급되고, 이 중화조(8)내에서는, 예를들면 섬유포백의 머세라이즈(mercerize)공정으로부터 발생하는 가성소다함유 배액(排液)(7)이 첨가되어서 중화되고, 이 중화수는, 그대로를 종합배수로서 방수하거나 혹은 활성탄처리, 오존처리, 자외선처리등을 행하여, 세정수로서 재사용할 수 있다.The colorless water decolorized in the decolorization tank 4 is supplied into the neutralization tank 8, and in this neutralization tank 8, caustic soda-containing drainage generated, for example, from the mercerize process of the fiber cloth. (Iii) (7) is added and neutralized, and this neutralized water can be reused as washing water by waterproofing it as a comprehensive drainage, or performing activated carbon treatment, ozone treatment, ultraviolet treatment, or the like.

이와같이 본 실시예에 의하떤, 염색공정의 세정기로부터 폐출되는 유색폐수는, 섬유포백의 표백공정에서 발생하는 배기가스 즉 2산화염소가스를 이용해서 탈색처리할 수 있어, 극히 경제적인 수단으로 염색공정으로부터 발생되는 착색폐수를 무공해처리할 수 있다. 또 본 발명에서는, 아염소산소다를 사용하는 표백공정에서 발생하는 유해폐가스(2산화염소가스)를 유색폐수의 탈색용으로서 유효하게 이용하므로, 종래와 같이 상기 유해폐가스를 무해화하기 위한 공정 및 장치가 불필요하게 되고, 경제성이 더욱 높아진다.Thus, the colored wastewater discharged from the washing machine of the dyeing process according to this embodiment can be decolorized by using the exhaust gas generated in the bleaching process of the fiber cloth, that is, chlorine dioxide gas, and the dyeing process is extremely economical. The colored wastewater from can be treated as pollution-free. In addition, in the present invention, since the hazardous waste gas (chlorine dioxide) generated in the bleaching process using sodium chlorite is effectively used for decolorizing the colored wastewater, the process and apparatus for making the harmful waste gas harmless as in the prior art. Becomes unnecessary, and the economics become higher.

(실험예)Experimental Example

반응성 염료 날염포백의 세정공정으로부터 폐출되는 세정폐액에, 고분자 응집제 선플록(일본국 산요카세이 공업주식회사 제품)을 1g/ι와, 무기응집제 Al2(SO4)318 H2O를 2g/ι를 첨가하고, 각각의 응집제의 유효응집 pH영역(약 pH4)으로 조정하여, 부상분리법에 의해서 염료색소와 응집분리한다. 이에 의해서 95-97%의 1차 탈색을 행할 수 있었다. 이어서 그 분리수(여액)에 남아 있는 3-5%의 염료에, 아염소산소다사용의 표백공정으로부터 발생되는 2산화염소가스를 0.lg/ι첨가해서 약 80℃에서 10분간 처리하므로서 분리수내의 색소가 분해되어서 2차 탈색되어, 무색수로 재생되었다.1 g / ι of polymer flocculant sun floc (manufactured by Sanyokasei Co., Ltd.) and 2 g / ι of inorganic coagulant Al 2 (SO 4 ) 3 18 H 2 O were added to the washing waste liquid discharged from the washing process of the reactive dye printing cloth. Was added, adjusted to the effective flocculation pH range of each flocculant (about pH4), and coagulated with dye dye by flotation separation. Thereby, 95-97% of primary discoloration could be performed. Subsequently, the dye in the separation water was added to 3-5% of the dye remaining in the separation water (filtrate) by adding 0.lg / ι of chlorine dioxide gas generated from the bleaching process using sodium chlorite and treating it at about 80 ° C for 10 minutes. Was decomposed and secondary bleached to regenerate as colorless water.

또한, 상기 분리수를 탈색하는데 소요되는 2산화염소가스는 분리수 1ι에 대하여 0.1g-0.15g이므로, 염료폐액 I시간분의 6ton을 탈색하려면 60g∼900g이 필요하나, 통상 표백시에 발생하는 2산화염소가스는 1분간에 18g(1시간에 1080g)이므로 충분히 처리할 수 있다.In addition, since the chlorine dioxide gas required to decolorize the separation water is 0.1g-0.15g per 1ι of separation water, 60g to 900g is required to decolor 6 tons of dye waste liquid I hour, but usually the oxidation occurs during bleaching. Chlorine gas is 18g per minute (1080g per hour), so it can be treated sufficiently.

이상과 같이 본 발명은, 염료를 함유한 폐액을, 응집제로 응집처리해서 염료를 분리하고, 이어서 이 분리한 여액중에, 표백공정으로부터 발생하는 2산화염소가스를 첨가해서, 여액중에 함유되는 미분리의 색소를 탈색처리하는 염색패액의 처리방법이므로, 이에 의하면, 염색공정의 세정기로부터 폐출되는 유색폐수는, 섬유포백의 표백공정에서 발생하는 배기가스 즉 2산화염소가스를 이용해서 탈색처리할 수 있어, 극히 경제적인 수단으로 염색공정으로부터 발생되는 착색폐수를 무공해처리할 수 있다.As described above, according to the present invention, the waste liquid containing the dye is coagulated with a flocculant to separate the dye, and then, to the separated filtrate, chlorine dioxide gas generated from the bleaching step is added, and the crude liquid is not separated. Since it is a treatment method of the dyeing solution which decolorizes the pigment | dye of, the colored wastewater discharged | emitted from the washing | cleaning machine of a dyeing process can be decolorized using the exhaust gas, ie, chlorine dioxide gas, which is produced in the bleaching process of fiber cloth. In addition, it is possible to treat the colored wastewater from the dyeing process without pollution by extremely economic means.

또 본 발명에서는, 아염소산소다를 사용하는 표백공정에서 발생하는 유해폐가스(2산화염소가스)를 유색폐수의 탈색용으로서 유효 이용하므로, 종래와 같이 상기 유해폐가스를 무해화하기 위한 공정 및 장치가 불필요하게 되고, 경제성이 더욱더 높아진다고 하는 효과를 얻을 수 있다.In addition, in the present invention, since the hazardous waste gas (chlorine dioxide) generated in the bleaching process using sodium chlorite is effectively used for decolorizing the colored wastewater, a process and apparatus for harmlessly removing the hazardous waste gas as in the prior art are provided. It becomes unnecessary, and the effect which becomes more economical can be acquired.

Claims (1)

염료를 함유하는 폐액을, 응답제로 응집처리해서 염료를 분리하고, 이어서 이 분리한 여액중에, 표백공정으로부터 발생하는 2산화염소가스를 첨가해서, 여액중에 함유되는 미분리의 색소를 탈색처리하는 것을 특징으로 하는 염색폐액의 처리방법.The waste liquid containing the dye is coagulated with a response agent to separate the dye, and then, to the separated filtrate, chlorine dioxide gas generated from the bleaching step is added to decolorize the unseparated pigment contained in the filtrate. A method of treating a dyeing waste liquid, characterized in that
KR1019930018106A 1992-09-10 1993-09-09 Dyeing waste water treatment method KR960013331B1 (en)

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JP92-241762 1992-09-10
JP4241762A JPH0691273A (en) 1992-09-10 1992-09-10 Method for treating waste liquid of dyeing

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KR960013331B1 true KR960013331B1 (en) 1996-10-04

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JP2009022940A (en) * 2007-07-18 2009-02-05 Solve:Kk Method of decoloring livestock wastewater and colored wastewater containing hardly decomposable ingredient
CN108729075A (en) * 2017-04-14 2018-11-02 邵阳纺织机械有限责任公司 A kind of dehydrating process carried out in gas-liquid dyeing machine

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