Complex printing and dyeing wastewater quality-divided treating and reusing integrated technology

A technology for the treatment of printing and dyeing wastewater and quality separation, which is applied in the textile industry wastewater treatment, multi-stage water treatment, water/sewage treatment and other directions, can solve the problems of unfavorable waste water treatment cost, consuming manpower and financial resources, and not implementing quality separation treatment, etc. Achieve the effect of reducing energy consumption, high reuse rate of reclaimed water, and low treatment cost

Active Publication Date: 2016-08-17
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many treatment processes involving printing and dyeing wastewater. For example, the patent CN105060636A divides the printing and dyeing process into high-quality water use process and low-quality water use process. Different water use processes use different reclaimed water treatment technologies to save energy and improve reclaimed water reuse. , but this patent only involves common comprehensive wastewater treatment (both COD and chroma are relatively low), and whether its treatment process is suitable for complex high-concentration, high-chroma printing and dyeing wastewater remains to be studied; patent CN101293726B discloses a printing and dyeing wastewater treatment and The method of quality separation and reuse, that is, according to the water quality requirements of the water used in each process of the printing and dyeing process, the water quality of each level of wastewater treatment is used in different processes of the printing and dyeing process, but this patent only uses COD as the evaluation of wastewater treatment and reclaimed water reuse indicators, and with the application of various anti-oxidation and anti-biodegradation additives and dyes, the removal of chroma and the size of chroma should also be used as importan

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  • Complex printing and dyeing wastewater quality-divided treating and reusing integrated technology

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Embodiment 1

[0043] The amount of highly polluted pulp dyeing wastewater with a COD of 1000mg / L and a chroma of 5000 times is 5000t; the water intake of comprehensive wastewater is 50000t with a COD of about 715mg / L and a chroma of 850 times. The highly polluted pulp dyeing wastewater is conditioned in the first regulating tank, and flocculated and decolorized in the first reaction tank, wherein the FeSO in the first reaction tank 4 The dosages of , PAM and quaternary ammonium polymer compounds were 1350mg / L, 9mg / L and 35mg / L respectively. After the first primary sedimentation tank settled (hydraulic retention time 3h), the COD dropped to 605mg / L, and the chroma reduced to 1852 times; after the reaction in the hydrolysis anaerobic tank, the COD dropped to 363mg / L, and the chroma dropped to 389 times (hydraulic retention time was 8h); after being degraded by the first contact oxidation tank, the COD dropped to 54mg / L, and the color The temperature is reduced to 206 times (the hydraulic rete...

Embodiment 2

[0048] The water intake of highly polluted pulp dyeing wastewater is 10,000t, the COD is about 2655mg / L, and the chroma is 9,000 times; the water intake of comprehensive wastewater is 40,000t, the COD is about 950mg / L, and the chroma is 1,000 times. Highly polluted wastewater is conditioned and tempered in the first regulating tank, and flocculated and decolorized in the first reaction tank, wherein the FeSO in the first reaction tank 4 The dosages of , PAM and quaternary ammonium polymer compounds were 1550mg / L, 13mg / L and 50mg / L respectively. After the first primary sedimentation tank settled (hydraulic retention time 3h), the COD dropped to 1290mg / L, and the chroma reduced to 2805 times; after the reaction in the hydrolysis anaerobic tank, the COD dropped to 768mg / L, and the chromaticity dropped to 626 times (the hydraulic retention time was 8h); after being degraded by the first contact oxidation tank, the COD dropped to 115mg / L, and the color The temperature is reduced to...

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Abstract

The invention relates to a complex printing and dyeing wastewater quality-divided treating and reusing integrated technology. The technology comprises two parts of quality-divided treating and quality-divided reusing, the whole technical process is realized through an automatic detection and control mode. For the characteristics that wastewater in a textile printing and dyeing garden is large in water quality change, high in chromaticity, difficult to biologically decompose and high in inorganic salt content, an existing efficient ozonation technology, an ultrafiltration-reverse osmosis membrane technology, an economical biochemical treatment technology, a double-tower filtration technology and an cation and anion exchange technology are integrated and optimized, for meeting the water quality requirement of water used in all processes of the garden, and efficient and low-cost treatment of the printing and dyeing wastewater is achieved by means of quality-divided treating and quality-divided reusing. Compared with a traditional treatment technology, though the water is more complex, high in chromaticity and difficult to decompose, treatment cost is lower, and the reuse rate of reclaimed water is larger and can reach 70-80%.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment, and in particular relates to an integrated technology for separate treatment and reuse of complex printing and dyeing waste water. Background technique [0002] my country is the largest country in textile printing and dyeing. The textile printing and dyeing industry plays a huge role in my country's national economy, but it creates huge economic benefits and also brings heavy pressure to water environmental protection. It has been listed as a key polluting industry in my country . According to incomplete statistics, the daily waste water discharged by the printing and dyeing industry is 3×10 6 -4×10 6 m 3 , has long been ranked among the forefront of water pollutant discharge in various industries in the country, and is one of the key pollution sources in my country's industrial system. Textile printing and dyeing wastewater has the characteristics of large chroma, hi...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/001C02F1/42C02F1/441C02F1/444C02F1/52C02F1/5245C02F1/56C02F1/78C02F3/30C02F9/00C02F2001/427C02F2101/308C02F2103/30C02F2301/08C02F2303/14
Inventor 尹华郭华芳易林姿李家杰
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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