CN107226575B - Wastewater treatment method for yarn mercerization production - Google Patents
Wastewater treatment method for yarn mercerization production Download PDFInfo
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- CN107226575B CN107226575B CN201710616902.1A CN201710616902A CN107226575B CN 107226575 B CN107226575 B CN 107226575B CN 201710616902 A CN201710616902 A CN 201710616902A CN 107226575 B CN107226575 B CN 107226575B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention aims to provide a wastewater treatment method for yarn mercerization production, which comprises the steps of firstly collecting wastewater, filtering, then detecting pH, concentration and pollutants in the wastewater, directly neutralizing the wastewater with low pH and concentration and more pollutants when the cost is too high, carrying out oxidation discharge after neutralization, carrying out oxidation purification on the wastewater with high pH and concentration and less pollutants by ozone, then evaporating and concentrating the wastewater to be used as concentrated alkali, detecting various indexes of the wastewater subjected to oxidation purification by ozone, and carrying out neutralization discharge when the wastewater is unqualified, so that the wastewater of yarn mercerization can be comprehensively treated, and the effect is good.
Description
Technical Field
The invention relates to the field of wastewater treatment in yarn mercerizing production, in particular to a wastewater treatment method in yarn mercerizing production.
Background
Mercerization is a process which can essentially change the characteristics of knitted fabrics, and generally refers to the treatment of cotton fabrics with calcined concentrated alkali solution under tension to obtain silk-like luster, improve dyeing uniformity and color yield, retain higher tensile strength after washing, wearing and finishing, obtain better dimensional stability, and change physical and mechanical properties such as strength, extensibility and elasticity to different degrees. According to the production development requirement, mercerized wastewater has alkali liquor, the alkali liquor needs to be recycled, yarns need to be cleaned after mercerization, the concentration of the alkali liquor in the cleaned wastewater is low, and the yarns also need to be treated, so that the problem is solved and the method is necessary
Disclosure of Invention
In order to solve the problems, the invention provides a wastewater treatment method for yarn mercerization production, which comprises the steps of firstly collecting wastewater, filtering, then detecting the pH, concentration and pollutants of alkali liquor, directly neutralizing wastewater with low pH and concentration of alkali liquor and more pollutants when the wastewater is too high in treatment cost, carrying out oxidation discharge after neutralization, carrying out oxidation purification on wastewater with high pH and concentration of alkali liquor and less pollutants through ozone, then carrying out evaporation concentration to obtain concentrated alkali, detecting various indexes on wastewater subjected to oxidation purification through ozone, and carrying out neutralization discharge when the wastewater is not qualified.
The invention aims to provide a wastewater treatment method for yarn mercerization production, which comprises the following steps:
the method comprises the following steps: discharging the mercerizing wastewater into a filter tank, wherein a filter screen is arranged at the water inlet of the filter tank for filtering large particles;
step two: extracting the wastewater in the filter tank to detect the pH, concentration and pollutants of the alkali liquor;
step three: discharging the wastewater with low pH and concentration of the alkali liquor and more pollutants detected by the filter tank into a neutralization tank, then adding acid liquor, monitoring the pH and concentration of the wastewater alkali liquor in the process of adding the acid liquor until the wastewater is neutral, and discharging the neutralized wastewater into a heat exchanger for waste heat utilization;
step four: discharging the wastewater of the heat exchanger in the third step into an oxidation pond, and adding manganese dioxide and hydrogen peroxide for stirring and oxidation;
step five: detecting the wastewater in the step four, and discharging the wastewater if the wastewater is qualified;
step six: discharging the wastewater with high pH and concentration of the alkali liquor and less pollutants detected by the filtering tank in the step two into an intermediate water tank, adding ozone into the intermediate water tank for oxidation and purification to obtain clear alkali liquor, and detecting various indexes;
step seven: and (4) evaporating and concentrating the alkali liquor qualified in the step six to obtain concentrated alkali.
The further improvement lies in that: and a secondary filter screen is arranged at the water outlet of the filter tank.
The further improvement lies in that: the seventh step can be replaced by: discharging the alkali liquor which is unqualified in the alkali liquor detection in the step six into a neutralization pool for acid addition neutralization, discharging the neutralized water into a heat exchanger for waste heat utilization, and then discharging.
The further improvement lies in that: and seventhly, after the concentrated alkali is obtained by evaporation and concentration, detecting the pH value and the concentration of the alkali liquor.
The invention has the beneficial effects that: the method comprises the steps of firstly collecting and filtering the wastewater, then detecting the pH, concentration and pollutants of the alkali liquor, directly neutralizing the wastewater with low pH and concentration of the alkali liquor and more pollutants with too high cost, then carrying out oxidation discharge after neutralization, carrying out oxidation purification on the wastewater with high pH and concentration of the alkali liquor and less pollutants by ozone, then evaporating and concentrating the wastewater to be used as concentrated alkali, detecting various indexes of the wastewater subjected to oxidation purification by ozone, and carrying out neutralization discharge if the wastewater is unqualified.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
The embodiment provides a wastewater treatment method for yarn mercerization production, which comprises the following steps:
the method comprises the following steps: discharging the mercerizing wastewater into a filter tank, wherein a filter screen is arranged at the water inlet of the filter tank for filtering large particles;
step two: extracting the wastewater in the filter tank to detect the pH, concentration and pollutants of the alkali liquor;
step three: discharging the wastewater with low pH and concentration of the alkali liquor and more pollutants detected by the filter tank into a neutralization tank, then adding acid liquor, monitoring the pH and concentration of the wastewater alkali liquor in the process of adding the acid liquor until the wastewater is neutral, and discharging the neutralized wastewater into a heat exchanger for waste heat utilization;
step four: discharging the wastewater of the heat exchanger in the third step into an oxidation pond, and adding manganese dioxide and hydrogen peroxide for stirring and oxidation;
step five: detecting the wastewater in the step four, and discharging the wastewater if the wastewater is qualified;
step six: discharging the wastewater with high pH and concentration of the alkali liquor and few pollutants detected by the filtering tank in the step two into an intermediate water tank, adding ozone into the intermediate water tank for oxidation and purification to obtain clear alkali liquor, and detecting various indexes;
step seven: and (4) evaporating and concentrating the alkali liquor qualified in the step six to obtain concentrated alkali.
And a secondary filter screen is arranged at the water outlet of the filter tank. The seventh step can be replaced by: discharging the alkali liquor which is unqualified in the alkali liquor detection in the step six into a neutralization pool for acid addition neutralization, discharging the neutralized water into a heat exchanger for waste heat utilization, and then discharging. And seventhly, after the concentrated alkali is obtained by evaporation and concentration, detecting the pH value and the concentration of the alkali liquor.
At first collect waste water and filter, later detect alkali lye pH to waste water, concentration and pollutant, alkali lye pH and concentration are low and the many waste water treatment of pollutant get up the cost too high then directly carry out the neutralization, carry out the oxidation discharge after the neutralization, the pH of alkali lye and the high and few waste water of pollutant of concentration then carry out oxidation purification through ozone, later the evaporation concentration is dense alkali and uses, and carry out oxidation purification's waste water through ozone and detect each item index, unqualified then neutralization discharge, can be comprehensive handle the waste water of yarn mercerization, and is good in effect.
Claims (4)
1. A wastewater treatment method for yarn mercerization production is characterized in that: the method comprises the following steps:
the method comprises the following steps: discharging the mercerizing wastewater into a filter tank, wherein a filter screen is arranged at the water inlet of the filter tank for filtering large particles;
step two: extracting the wastewater in the filter tank to detect the pH, concentration and pollutants of the alkali liquor;
step three: discharging the wastewater with low pH and concentration of the alkali liquor and more pollutants detected by the filter tank into a neutralization tank, then adding acid liquor, monitoring the pH and concentration of the alkali liquor of the wastewater in the process of adding the acid liquor until the wastewater is neutral, and discharging the neutralized wastewater into a heat exchanger for waste heat utilization;
step four: discharging the wastewater of the heat exchanger in the third step into an oxidation pond, and adding manganese dioxide and hydrogen peroxide for stirring and oxidation;
step five: detecting the wastewater in the step four, and discharging the wastewater if the wastewater is qualified;
step six: discharging the wastewater with high pH and concentration of the alkali liquor and less pollutants detected by the filtering tank in the step two into an intermediate water tank, adding ozone into the intermediate water tank for oxidation and purification to obtain clear alkali liquor, and detecting various indexes;
step seven: and (4) evaporating and concentrating the alkali liquor qualified in the step six to obtain concentrated alkali.
2. The method for treating the wastewater generated in the mercerizing production of the yarns according to claim 1, is characterized in that: and a secondary filter screen is arranged at the water outlet of the filter tank.
3. The method for treating the wastewater generated in the mercerizing production of the yarns according to claim 1, is characterized in that: the seventh step can be replaced by: discharging the alkali liquor which is unqualified in the alkali liquor detection in the step six into a neutralization pool for acid addition neutralization, discharging the neutralized water into a heat exchanger for waste heat utilization, and then discharging.
4. The method for treating the wastewater generated in the mercerizing production of the yarns according to claim 1, is characterized in that: and seventhly, after the concentrated alkali is obtained by evaporation and concentration, detecting the pH value and the concentration of the alkali liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710616902.1A CN107226575B (en) | 2017-07-26 | 2017-07-26 | Wastewater treatment method for yarn mercerization production |
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| CN201710616902.1A CN107226575B (en) | 2017-07-26 | 2017-07-26 | Wastewater treatment method for yarn mercerization production |
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| CN107226575A CN107226575A (en) | 2017-10-03 |
| CN107226575B true CN107226575B (en) | 2020-12-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774988A (en) * | 2012-07-24 | 2012-11-14 | 吴江市聚力机械有限公司 | Mercerizing wastewater treatment device |
| CN202625970U (en) * | 2012-05-24 | 2012-12-26 | 东莞理工学院 | Purification and recovery device for denim mercerization exhausted lye |
| CN202705165U (en) * | 2012-07-24 | 2013-01-30 | 吴江市聚力机械有限公司 | Mercerization wastewater treatment device |
| CN204198542U (en) * | 2014-10-24 | 2015-03-11 | 天津市联合环保工程设计有限公司 | A kind of evaporation of the catalyzed oxidation for yarn-dyed fabric mercerized waste alkali liquid recovery system |
| CN105565528A (en) * | 2015-12-23 | 2016-05-11 | 大连理工大学 | Mercerized light alkaline purification recovery method and apparatus |
-
2017
- 2017-07-26 CN CN201710616902.1A patent/CN107226575B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202625970U (en) * | 2012-05-24 | 2012-12-26 | 东莞理工学院 | Purification and recovery device for denim mercerization exhausted lye |
| CN102774988A (en) * | 2012-07-24 | 2012-11-14 | 吴江市聚力机械有限公司 | Mercerizing wastewater treatment device |
| CN202705165U (en) * | 2012-07-24 | 2013-01-30 | 吴江市聚力机械有限公司 | Mercerization wastewater treatment device |
| CN204198542U (en) * | 2014-10-24 | 2015-03-11 | 天津市联合环保工程设计有限公司 | A kind of evaporation of the catalyzed oxidation for yarn-dyed fabric mercerized waste alkali liquid recovery system |
| CN105565528A (en) * | 2015-12-23 | 2016-05-11 | 大连理工大学 | Mercerized light alkaline purification recovery method and apparatus |
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| CN107226575A (en) | 2017-10-03 |
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