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Basic dye wastewater purifying treatment system

A basic dye and purification treatment technology, which is applied in energy wastewater treatment, textile industry wastewater treatment, water/sewage treatment, etc., can solve the problems of high cost and low efficiency, achieve high-efficiency treatment, strong biodegradability, and simple operation Effect

Active Publication Date: 2017-03-15
NANYANG NORMAL UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low efficiency or high cost in the treatment of dye wastewater in the prior art, the present invention provides a purification treatment system for basic dye wastewater. By setting a homogeneous tank, a catalytic reaction tank and a grit chamber, the alkali The dye wastewater is fully homogenized in the homogenization tank in turn, and fully reacts with hydrogen peroxide under the action of the catalyst in the catalytic reaction tank, and finally generates sediment in the grit chamber and discharges the purified water, which has the advantages of simple operation and mild conditions , low cost, low energy consumption and no secondary pollution, etc., can efficiently treat the common alkaline dye wastewater in the printing and dyeing industry, and can be compatible with wastewater under neutral and acidic conditions

Method used

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Embodiment 1

[0048] Such as figure 1 As shown, this embodiment is composed of an annular homogeneous tank 1, a catalytic reaction tank 2, a grit chamber 3 and a purification treatment system. The acid scarlet dye waste water enters the annular homogeneous tank 1 from the water inlet pipe 101, and the hydraulic retention time is 4h; 30wt.%H 2 o 2 After the hydrogen peroxide enters the pipe 104 into the ring-shaped homogeneous pool 1 (i.e. the water outlet pipe 102), the two are pre-mixed and enter the catalytic reaction pool 2, and the recycled catalyst inlet 203 enters the catalytic reaction pool 2, and the residence time is 20 minutes. . The degraded effluent is subjected to liquid-solid separation in the grit chamber 3, the impeller speed is 5r / min, the hydraulic retention time is 45S, and the clarified effluent flows out from the clean water outlet 303, where samples can be taken for testing. The separated catalyst enters the purification treatment system with H 2 O is the cleaning ...

Embodiment 2

[0052] Unit operation and catalyzer are with embodiment 1;

[0053] The concentration of acid scarlet dye wastewater is 1kg / t, 30wt.% H 2 o 2 The dosage is 2kg / t, the dosage of the catalyst is 2.5kg / t, it can be recycled, and the pH value is 10. The effluent was sampled by spectrophotometry and the degradation rate of acid scarlet was 65.6%.

Embodiment 3

[0055] Unit operation and catalyzer are with embodiment 1;

[0056] The concentration of acid scarlet dye wastewater is 1kg / t, 30wt.% H 2 o 2 The dosage is 2kg / t, the dosage of the catalyst is 2.5kg / t, it can be recycled, and the pH value is 7. The effluent was sampled by spectrophotometry and the degradation rate of acid scarlet was 22.3%. Prolong the residence time of sewage in the catalytic reaction tank 2 to 30min, and the degradation rate of acid scarlet is 30.1%. If the residence time is further extended, a higher degradation rate can be obtained.

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Abstract

The invention provides a basic dye wastewater purifying treatment system. Basic dye wastewater to be treated is sequentially subjected to homogenizing in a homogenizing tank, a reaction in a catalytic reaction tank and settling in a girt removal basin, and then purifying treatment is completed; due to the fact that a water inlet pipe and a water outlet pipe of the homogenizing tank communicate with each other through arc-shaped communication pipes with different lengths, water earliest entering the arc-shaped communication pipes through the water inlet pipe can reach the water outlet pipe latest, and water latest entering the arc-shaped communication pipes through the water inlet pipe can reach the water outlet pipe earliest. According to the system, by arranging the homogenizing tank, the catalytic reaction tank and the girt removal basin, the basic dye wastewater is fully homogenized in the homogenizing tank and fully reacts with hydrogen peroxide under the action of a catalyst in the catalytic reaction tank, precipitates are generated in the girt removal basin, purified water is discharged, the advantages of being easy to operate, mild in condition, low in cost and energy consumption, not capable of generating secondary pollution and the like are achieved, the common basic dye wastewater in the printing and dyeing industry can be efficiently treated, and neutral and acidic wastewater also can be treated.

Description

technical field [0001] The invention relates to waste water treatment in the field of environmental protection, in particular to a purification treatment system for basic dye waste water. Background technique [0002] Dye wastewater is colored wastewater containing dyes. It has the characteristics of complex composition, high alkalinity, high chroma, high concentration of refractory biodegradable substances, and large changes in water volume and water quality. It is one of the most difficult industrial wastewater to treat. [0003] In order to solve the pollution of organic dyes to the environment, people use different methods to treat the wastewater containing dyes. At present, the treatment methods of dye wastewater mainly include physical and chemical treatment, radiation method, adsorption extraction method, micro-electrolysis method, biodegradation method, etc. However, these technologies are difficult to be widely used due to reasons such as low efficiency or high cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J29/46C02F101/30C02F103/30
CPCC02F1/722C02F1/725B01J29/46C02F2101/308C02F2103/30C02F2305/026B01J2229/18Y02W10/37
Inventor 杨昱涵范会涛邱东方刘小娣赵一阳刘珊珊仲志国
Owner NANYANG NORMAL UNIV
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