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A printing and dyeing high-quality dyeing water treatment system and its process

A water treatment system and technology of treatment system, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of unstable operation effect, low operation cost and large investment, etc. , to achieve the effect of stable treatment effect, extensive promotion value and low operating cost

Active Publication Date: 2020-11-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a low reuse rate, is vulnerable to the impact of incoming water, and the ozone sterilization effect is unstable
The Chinese patent application document with the application number ZL 200910112879.8 discloses a printing and dyeing advanced wastewater treatment device and method, which uses nano-catalyzed micro-electrolysis and then reverse osmosis filtration. This method has a high desalination rate and high water quality, but Large investment, high energy consumption and low reuse rate
The Chinese patent application document with the application number ZL 201120230172.X discloses a printing and dyeing wastewater treatment and reuse system. The pretreated printing and dyeing wastewater is treated and reused through a double-membrane system. This method has a good decolorization effect and occupies a small area. The method cannot deal with cleaning wastewater and concentrated water in time, and the operation effect is unstable
The Chinese patent application document with the application number ZL 201120266321.8 discloses a printing and dyeing wastewater reuse treatment system, which is mainly processed through biochemical aeration tanks, air flotation tanks and sand filters. This method has low construction and operation costs, but the effluent quality is poor , reuse is limited

Method used

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  • A printing and dyeing high-quality dyeing water treatment system and its process
  • A printing and dyeing high-quality dyeing water treatment system and its process
  • A printing and dyeing high-quality dyeing water treatment system and its process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A printing and dyeing enterprise produces 3500t / year of high-grade dyeing and 3000t / year of dyeing and finishing. The enterprise has a printing and dyeing workshop, and also includes four main subsystems: tap water softening water treatment system 1, wastewater pretreatment system 2, wastewater advanced treatment system 3, and river water purification treatment system 4. Among them, the tap water softening water treatment system 1 is composed of a storage tank 1-1, a sodium ion exchanger 1-2, a salt dissolution tank 1-3, and a soft water storage tank 1-4; the wastewater pretreatment system 2 is composed of a regulating tank 2-1 , primary sedimentation tank 2-2, hydrolytic acidification tank 2-3, aerobic tank 2-4, secondary sedimentation tank 2-5; wastewater advanced treatment system 3 consists of 1# intermediate pool 3-1, multi-media filter 3- 2. 2# intermediate pool 3-3, ultrafiltration 3-4, ultrafiltration water production pool 3-5, reverse osmosis 3-6, reuse water po...

Embodiment 2

[0078] The content different from embodiment 1 is: the tap water softening water treatment system 1 treats the water volume to be Q1=300m 3 / d; Waste water pretreatment system 2 treats water volume as Q2=1000m 3 / d, wherein the amount of water entering into the wastewater advanced treatment system 3 is Q2-2=1085m 3 / d, the wastewater discharged by the wastewater pretreatment system 2 up to the standard is Q2-1=300m 3 / d; Reuse water is Q3=900m 3 / d, the return water is Q3-1=385m 3 / d, the river water purification treatment system 4 treats the water volume as Q4=200m 3 / d. Dyeing workshop 5 evaporation and product take away moisture is Q5=200m 3 / d.

[0079] The ratio of tap water softening water treatment system 1 to treat water volume Q1 and waste water advanced treatment system 3 to treat water volume to Q3 is 1:2.5~3. Q3=900m 3 / d. The water quality of the system is shown in Table 2.

[0080] Table 2

[0081]

[0082] After a period of operation and management...

Embodiment 3

[0084] The content different from embodiment 1 is: the tap water softening water treatment system 1 treats the water volume to be Q1=300m 3 / d; the amount of water treated by wastewater pretreatment system 2 is Q2=1150m 3 / d, wherein the amount of water entering into the wastewater advanced treatment system 3 is Q2-2=1255m 3 / d, the waste water discharged by the waste water pretreatment system 2 up to the standard is Q2-1=345m 3 / d; Reuse water is Q3=1050m 3 / d, return water is Q3-1=450m 3 / d, the river water purification treatment system 4 treats the water volume as Q4=245m 3 / d. Dyeing workshop 5 evaporation and product take away moisture is Q5=200m 3 / d.

[0085] The ratio of tap water softening water treatment system 1 to Q1 and waste water advanced treatment system 3 to Q3 is 1:3.5. Q3=1050m 3 / d. The water quality of the system is shown in Table 3.

[0086] table 3

[0087]

[0088] After a period of operation and management, after the system is stable, the...

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Abstract

The invention discloses a treatment method and a treatment and reuse method for printing and dyeing high-quality dyeing water. The treatment system comprises a tap water softening treatment system, awastewater pretreatment system, an advanced wastewater treatment system, a river water purifying treatment system and a printing and dyeing workshop. Wastewater generated in the printing and dyeing workshop enters the wastewater pretreatment system and is pretreated, a part of the pretreated wastewater meets standards and is discharged, and the remaining pretreated wastewater is discharged to theadvanced wastewater treatment system; rainwater and river water of an external river are purified by the river water purifying treatment system, and effluent water enters the advanced wastewater treatment system; and regenerated water of the advanced wastewater treatment system and tap water of the tap water softening treatment system enter the printing and dyeing workshop, and the regenerated water is preferably adopted. The treatment system and the method have the advantages of stable treatment effect, high safety factor, high reusing rate, low running cost, greenness, environmental protection and wide promotion values.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a printing and dyeing wastewater treatment and clean production process, in particular to a system and a process for advanced treatment and reuse of dyeing wastewater. Background technique [0002] Printing and dyeing wastewater is one of the main difficult-to-treat and harmful industrial wastewater in my country. It is characterized by a large amount of wastewater, complex water quality, large chroma, high concentration of organic matter, and many refractory substances. The classification of printing and dyeing wastewater is based on fiber types and dyeing and finishing processes. Printing and dyeing products are divided into three categories: bleached cloth, dyed cloth and printed cloth. Among them, bleached cloth accounts for the smallest proportion, accounting for about 13%; printed cloth accounts for about 24%; dyed cloth accounts for the largest proportion, about 63%. Pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/42C02F1/441C02F1/444C02F3/30C02F9/00C02F2001/007C02F2001/425
Inventor 许明操家顺
Owner HOHAI UNIV