Fenton catalytic oxidation reactor and high-difficulty treatment method for industrial wastewater

A technology for catalytic oxidation and industrial wastewater, which is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, and water treatment of special compounds. Fast, less drug consumption effect

Inactive Publication Date: 2018-09-28
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a Fenton catalytic oxidation reactor and a treatment method for its difficult industrial wastewater, which solves the problem of the large amount of chemicals used, the large amount of sludge produced, and the high operating cost in the existing Fenton oxidation process for treating wastewater. question

Method used

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  • Fenton catalytic oxidation reactor and high-difficulty treatment method for industrial wastewater

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Embodiment 1

[0027] Such as figure 1 As shown, a Fenton catalytic oxidation reactor includes a reactor body, and the interior of the reactor body is sequentially provided with a water inlet distribution pipe 10, an oxidant dosing pipe 9, a solid-phase catalyst layer 8 and a spray nozzle. Showering device 6, described inlet water distribution pipe 10 is sequentially connected to online pH meter 3, pipeline mixer 2 and water inlet lifting pump 1 through waste water inlet pipe, and described pipeline mixer 2 is provided with sulfuric acid drug inlet and sulfuric acid Iron salt drug inlet, the oxidant dosing pipe 9 is connected to the oxidant dosing pump 11, the spray device 6 is connected to the flushing water inlet pipeline 7, the solid phase catalyst layer 8 is connected to the spray device 6 The reactor main body in between is provided with a reactor outlet pipe 13 and a return pipe 4 from top to bottom, and the return pipe communicates with the waste water inlet pipe through a return pump...

Embodiment 2

[0033] A treatment method for highly difficult industrial waste water, comprising the following steps:

[0034] (1) The difficult industrial wastewater enters the water inlet distribution pipe 10 at the bottom of the reactor main body through the wastewater inlet pipe under the action of the water inlet lift pump 1, and sulfuric acid and ferrous sulfate enter the pipeline mixer 2 to mix with the difficult industrial wastewater, And through the water distribution hole on the water distribution pipe 10, it flows upward in the reactor, and the pH of the wastewater inlet is monitored by the online pH meter 3. The pH of the wastewater is between 2.5-4, and the temperature is set at 20-35 ° C;

[0035] (2) The oxidant is pumped into the oxidant dosing pipe 9 through the oxidant dosing pump, the oxidant flows out from the orifice of the oxidant dosing pipe 9, and mixes with the upwardly flowing waste water. After the oxidant and waste water are mixed, they flow upward under the action...

Embodiment example 1

[0041]In the advanced treatment of antibiotic wastewater, the Fenton catalytic oxidation reactor is used, and the residence time of sewage is 4h. Control the pH of the influent water at 2.5-3.0, the temperature at 28°C, and the molar ratio of the dosage of oxidant to the dosage of ferrous sulfate is 1:2.5. The aspect ratio of the reactor is 4. The height of the solid catalyst layer 8 is 2.5 times the diameter.

[0042] The solid-phase catalyst uses granular ceramics with a diameter of 10mm as the carrier.

[0043] After adopting this reactor, the concentration of CODcr in wastewater is reduced from 320mg / L to below 115mg / L.

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Abstract

The invention relates to a Fenton catalytic oxidation reactor and a high-difficulty treatment method for industrial wastewater. The Fenton catalytic oxidation reactor comprises a reactor main body; and the interior of the reactor main body is provided with a water inlet distributing pipe, an oxidant adding pipe, a solid phase catalyst layer and a spraying device in sequence from the bottom to thetop, wherein the water inlet distributing pipe is sequentially connected with an online pH meter, a pipeline mixer and a water inlet lifting pump through a wastewater inlet pipe, the oxidant adding pipe is connected with an oxidation medicine adding pump, the spraying device is connected with a flushing water inlet pipeline, a reactor water outlet pipe and a backflow pipeline are arranged from thetop to the bottom between the solid phase catalyst layer and the spraying device, and the backflow pipeline communicates with the wastewater inlet pipe through a reflux pump. The reactor disclosed bythe invention has a pollutant removing rate of the wastewater 30% or more higher than a Fenton fluidized bed under the same water-inlet conditions and the same medicine-adding conditions; and under the condition of a same removing rate, a medicine adding amount of the reactor disclosed by the invention is reduced by 25%-40% than that of a conventional Fenton reactor, and the chemical sludge yieldis reduced by 18% or more.

Description

technical field [0001] The invention relates to a Fenton catalytic oxidation reactor and a treatment method for difficult industrial waste water, belonging to the field of industrial waste water treatment equipment. Background technique [0002] The wastewater produced by fine chemical industry, printing and dyeing industry, pharmaceutical industry, electroplating industry, tanning industry, metallurgical industry, coking industry, pesticide industry and other industries has poor biodegradability, contains many refractory substances, contains many biological toxic substances, and is highly Chromaticity, high salt, high sulfate and many other characteristics have become difficulties in the treatment of industrial wastewater. Such industrial wastewater can be collectively referred to as difficult industrial wastewater, which is often difficult to degrade by conventional microbial treatment methods, but requires a combination of chemical, physical and biological methods to redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
CPCC02F1/722C02F1/725C02F2305/026
Inventor 张传兵徐亚慧王慧芳侯亚平徐漫漫邵建彬苏继明王存彦廖庆花张新艳周东博徐亚萍张海森万家虎关亚坤
Owner 华夏碧水环保科技股份有限公司
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