Baffled Fenton oxidation reactor and organic wastewater treatment method

A Fenton oxidation and organic wastewater technology, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of difficult removal of solids, unfavorable rapid response, etc., and improve the efficiency of Fenton treatment , shorten the residence time, reduce the effect of back mixing

Active Publication Date: 2018-10-23
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that when the water flows along the direction of gravity, the degree of back mixing is relatively greater than that of the flow perpendicular to the direction of gravity, so the residence time distribution will be wider, which is not conducive to rapid response; in addition, if the dynamic guide Flow sheet or static flow sheet is at a certain angle to the horizontal direction, which will cause solids or flocs to accumulate at the position where the flow sheet is close to the screw shaft or the static flow sheet is close to the inner wall of the reactor. Although the reactor will not be blocked, the solids will not easy to remove

Method used

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  • Baffled Fenton oxidation reactor and organic wastewater treatment method
  • Baffled Fenton oxidation reactor and organic wastewater treatment method

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Embodiment 1

[0045] The flow rate of organic wastewater is 0.2m3 / h, the CODCr is 3620mg / L, the size of the designed baffle reactor is Φ500×120mm, there are 8 sets of upper and lower baffle tubes inside, the air-water ratio is 3:1, and the motor is stirred Speed ​​at 50RPM, FeSO 4 Solution (Fe2+ molar concentration is 1.42mol / L) dosage is 13.6L / h, H 2 o 2 The dosage of solution (27.5%, w / w) was 4L / h, and CODCr decreased from 3620mg / L to 500mg / L after treatment.

Embodiment 2

[0047] The flow rate of organic wastewater is 1m3 / h, the CODCr is 8050mg / L, and the designed baffled reactor has a size of Φ900×200mm. There are five sets of upper and lower baffled tubes 22 and 24 inside, and the air-water volume ratio is 10:1. , motor stirring speed is 100RPM, FeSO 4 The dosage of the solution (Fe2+ molar concentration is 1.42mol / L) is 44.4L / h, the dosage of H2O2 solution (27.5%, w / w) is 20L / h, and the CODCr drops from 8050mg / L to 2100mg / L after treatment .

Embodiment 3

[0049] The flow rate of organic wastewater is 4.2m3 / h, CODCr is 12000mg / L, the designed baffled reactor has a size of Φ1200×900mm, and there are 10 sets of upper and lower baffled tubes inside, the gas-water volume ratio is 8:1, and the stirring speed of the motor is 250RPM, FeSO 4 Solution (Fe 2 + molar concentration is 1.42mol / L) dosage is 185L / h, H2O2 solution (27.5%, w / w) dosage is 105L / h, after treatment CODCr drops from 12000mg / L to 4800mg / L.

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Abstract

The invention relates to a baffled Fenton oxidation reactor and an organic wastewater treatment method. The baffled Fenton oxidation reactor comprises a chemical mixing area, a baffled reaction area ,and four pipeline connectors, the chemical mixing area and the baffled reaction area are sequentially arranged from the inside to the outside of concentric sleeves, wherein the bottom central area isprovided with a wastewater inlet, a series of compressed air connectors are arranged on the bottom of the reaction area, and a drain outlet and an exhaust outlet are arranged at a position far from the center. The organic wastewater treatment method comprises the following steps: after wastewater is filtered and pH is regulated, metering pumps quantitatively add FeSO4 solution and H2O2 solution in sequence into a water inlet pipeline by means of a jet device to get into the reactor, an aerator is switched on, the mixed wastewater gets into the chemical mixing area in a tangential feeding manner, and rapidly spirals upwards along the internal wall of the barrel under the action of an agitating pump, the disturbance and turbulence of the wastewater are further intensified by fin baffles, and thereby the uniform mixing of the wastewater and chemical is promoted; in the baffled reaction area, and the mixed wastewater passes through in the form of plug flow, carries out rapid Fenton reaction, and flows out of the reactor via a downflow weir.

Description

technical field [0001] The invention belongs to organic waste water treatment equipment, in particular to a Fenton oxidation baffle reactor and an organic waste water treatment method. Background technique [0002] As an advanced oxidation technology, Fenton oxidation technology can effectively degrade organic matter, so it is widely used in the pretreatment of industrial sewage and the advanced treatment of biochemical tail water. The basic principle is that, under appropriate pH conditions, the use of Fe 2 Catalysis of +, H 2 o 2 Generate highly reactive hydroxyl radicals (OH), which can interact with most organic substances to degrade them, while the Fe generated by the Fenton reaction 3 + Produce coagulation and sedimentation, which can remove a large amount of organic matter, thereby effectively reducing COD in wastewater. In the traditional Fenton reaction tank, the agent mainly relies on manual dosing, the mixing effect is poor, the utilization rate of the agent is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
CPCC02F1/722C02F1/725C02F2201/002C02F2201/007
Inventor 卢伟王丹丹陈福明
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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