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Device and method for treating and recycling printing and dyeing wastewater

一种处理循环、印染废水的技术，应用在纺织工业废水处理、废涂料处理、多阶段水处理等方向，能够解决达不到工业废水回用标准、化学药剂消耗多、水资源浪费大等问题，达到减少生产用水量和废水排放量、减少污泥处理成本、减少废水排放的效果

Inactive Publication Date: 2011-05-11
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to address the existing printing and dyeing wastewater that consumes a lot of chemicals, discharges a large amount of sludge, fails to meet the industrial wastewater reuse standard after wastewater treatment, discharges a lot of wastewater, wastes water resources, is high in cost, and complicated to operate. It is easy to cause secondary pollution and other disadvantages, providing a COD Cr Printing and dyeing wastewater treatment recycling device and method based on nano-catalytic electrolysis and membrane technology with high removal rate, less consumption of chemicals, less sludge generation, more thorough treatment, and high water reuse rate

Method used

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  • Device and method for treating and recycling printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Step 1 desulfurization

[0076] Printing and dyeing wastewater enters the coarse grid filter 1 to filter and remove large particles of solids, then flows into the adjustment tank 2 for mixing, and then pumps the wastewater from the adjustment tank 2 into the hydraulic sieve 3 to filter and remove impurities such as fibers, and then flows into the desulfurization reaction tank 4. The equivalent concentration of sulfide ions is added to the ferrous sulfate solution in an amount of 1:1.1 of the equivalent concentration, and desulfurization is performed at room temperature. Divalent sulfide ions react with ferrous ions to form ferrous sulfide precipitates, which are separated into iron sulfide pollutants. mud and desulfurization wastewater.

[0077] Step 2 Nanocatalytic electrolysis

[0078] The wastewater desulfurized in step 1 flows into the nano catalytic electrolysis machine 5 for electrolysis, the working voltage of the electrolysis is 2-500V, the voltage between the ...

Embodiment 2

[0093] The following combination figure 1 The illustrated embodiment of the printing and dyeing wastewater treatment and recycling device based on nano-catalytic electrolysis and membrane technology gives an example of the printing and dyeing wastewater treatment and recycling method based on nano-catalytic electrolysis and membrane technology. 300 tons / day printing and dyeing wastewater treatment and purification reuse project. The measured indicators of the printing and dyeing wastewater (comprehensive wastewater) are shown in Table 2.

[0094] Table 2

[0095] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

3160

5

S 2-

mg / L

132

2

SS

mg / L

311

6

Chroma

600

[0096] 3

NH 3 -N

mg / L

265

7

pH

9.3

4

BOD5

mg / L

1030

8

Sodium chloride

...

Embodiment 3

[0101] 3,000 tons / day tannery treatment wastewater reuse project.

[0102] The measured indicators of the printing and dyeing wastewater (comprehensive wastewater) are shown in Table 4.

[0103] Table 4

[0104] serial number

[0105] Waste water through water according to 150m 3 The flow rate of / H enters the coarse grid filter 1 to filter and remove large particles of solids, then flows into the adjustment tank 2 for mixing, and then the wastewater in the adjustment tank 2 is divided into 150m 3 After the flow rate of / H is pumped into the hydraulic sieve 3 to filter impurities such as fibers, it flows into the desulfurization reaction tank 4, and the equivalent concentration of divalent sulfide ions is measured online, and the ferrous sulfate solution is added in an amount of 1:1.1 of the equivalent concentration, and reacted at room temperature Desulfurization, the desulfurized wastewater flows into the nano catalytic electrolysis machine 5 for electrolysis, th...

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Abstract

The invention discloses a device and method for treating and recycling printing and dyeing wastewater, relating to printing and dyeing wastewater treatment and providing a device and method for treating and recycling printing and dyeing wastewater on the basis of a nano catalytic electrolysis and membrane technology, with the advantages of high removing rate of CODCr, less consumption of chemical agents, less produced sludge, more thorough treatment and high water recycling rate. The device is provided with a coarse grid filtering machine, an adjusting pool, a hydraulic sieve, a desulphurization reaction tank, a nano catalytic electrolysis machine, a flocculation reaction tank, a settling tank, an air flotation device, a biochemical reaction tank, a secondary settling tank, a secondary nano catalytic electrolysis machine, a filter, a pressure filter, a membrane system and a circulating water tank. The method comprises the following specific steps of desulphurization, nano catalytic electrolysis, flocculation, biochemical treatment, secondary catalytic electrolysis, filtering, and membrane separation.

Description

technical field [0001] The invention relates to a printing and dyeing wastewater treatment, in particular to a printing and dyeing wastewater treatment recycling method based on nano-catalysis electrolysis technology and membrane technology. Background technique [0002] The textile industry usually includes five major components: textile, printing and dyeing, chemical fiber, clothing and textile special equipment manufacturing. With the rapid development of the national economy, the printing and dyeing industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. The printing and dyeing enterprises have developed very rapidly. More than 2000. Printing and dyeing process refers to the general term for the physical and chemical treatment of various textile materials fibers, yarns, and fabrics during the production process, including the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/52
CPCC02F1/001C02F1/24C02F1/441C02F1/442C02F1/444C02F1/461C02F1/463C02F1/465C02F1/4672C02F1/5245C02F1/56C02F1/725C02F3/02C02F3/30C02F9/00C02F11/12C02F2001/007C02F2001/46142C02F2101/101C02F2101/308C02F2103/14C02F2103/30C02F2201/46135C02F2201/4614C02F2201/4615C02F2209/001C02F2209/19C02F2301/08C02F2303/04C02F2303/24C02F2305/023C02F2305/08Y02W10/10
Inventor 张世文纪锡和方宏达王峰潘美平
Owner BOYING XIAMEN SCI & TECH
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