Oxidation nanofiltration membrane reactor

An oxidation reaction and reactor technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., to accelerate the degradation rate, increase the shear force on the membrane surface, and reduce the coalescence effect. Effect

Active Publication Date: 2011-10-19
南京工大釜鼎能源技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned problems in the removal of refractory organic wastewater by single ozonation and membrane separation. Deep oxidation nanofiltration membrane reactor; Another object of the present invention is to provide the oxidation method that utilizes this reactor

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Embodiment 1

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029]A kind of oxidation nanofiltration membrane reactor provided by the present invention, by reaction-separation system (raw material pump A-1, oxidation reactor 2, circulation pipe 4, gas distribution plate 5), pressurization system (ozone generator F- 1. It is composed of buffer tank F-2, pneumatic booster pump F-3, air compressor F-4, surge tank F-5), exhaust gas treatment system (ozone absorption device 1), and the materials of each component are conventional materials ,like figure 1 shown. Among them, the oxidation reaction kettle 2 is divided into a gas-liquid separation zone a, a reaction-separation zone b and a settling zone d. The top of the gas-liquid separation zone a has a feed liquid inlet A and an exhaust gas outlet B. The feed liquid inlet A passes through the valve V-1 and the raw material The pump A-1 is connected, and the exhaust gas outlet B is ...

Embodiment 2

[0033] The refractory humic acid solution is deeply degraded and removed by using the oxidation nanofiltration membrane reactor provided by the invention. The height of the oxidation reaction kettle of the reactor is 0.6m, its inner diameter is 0.6m, the height ratio of the reaction-separation zone to the gas-liquid separation zone is 2, the ratio of the inner diameter of the oxidation reaction kettle to the circulation pipe is 12, and there are 5 sets of symmetrical circulation pipes. The aeration aperture of the distribution plate is 4mm, and the distance between the centers of the pores is 8mm. Configure the humic acid solution to be 50mg / l and adjust the pH of the solution to 10, the TOC value is 18.95mg / l, the COD is 62mg / l, and the turbidity value is 20.4NTU; In the reactor, the concentration of ozone gas is 100mg / l, adjust the gas rotameter, control the aeration flow rate so that the gas velocity on the membrane surface is 0.5m / s, the membrane element used in this exper...

Embodiment 3

[0035] The oxidation nanofiltration membrane reactor provided by the invention is used to carry out deep degradation and removal of the refractory phenol solution. The height of the oxidation reaction kettle of the reactor is 0.8m, and its inner diameter is 0.3m. The aeration aperture of the distribution plate is 2mm, and the distance between the centers of the air holes is 4mm. Configure the phenol solution to be 100mg / l and adjust the pH of the solution to be 7, the TOC value is 90.11mg / l, the COD is 283mg / l, and the turbidity value is 9.6NTU; feed the feed liquid into the oxidation reaction kettle through the pump from the feed liquid inlet middle. The concentration of ozone gas is 200mg / l, adjust the gas rotameter, control the aeration flow rate so that the gas velocity on the membrane surface is 0.1m / s, the membrane element used in this experiment is a 19-channel TiO2 with a pore size of 0.9nm 2 Ceramic nanofiltration membrane, control the pressure of the surge tank to ...

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Abstract

The invention relates to an oxidation nanofiltration membrane reactor. The oxidation nanofiltration membrane reactor consists of a reaction-separation system (a raw material pump, an oxidation reaction kettle, a circulating pipe and a gas distribution plate), a pressurizing system (an ozone generator, a buffer tank, a pneumatic booster pump, an air compressor and a pressure-stabilizing tank) and a tail gas treatment system (an ozone absorption device), wherein a membrane component is encapsulated in a membrane component and placed into the reaction kettle; the circulating pipe is arranged at the position of a side arm of the kettle body; and the gas distribution plate is positioned on the top of a settling region. In the reactor, the kettle body serves as a liquid ascending region, the circulating pipe serves as a liquid descending region, gas is redistributed through a membrane channel, and gas liquid phases form slug flow in the membrane channel, so that gas liquid mass transfer is enhanced, the reaction process is enhanced and the utilization ratio of the gas is increased; and high-pressure ozonized air generated by the pressurizing system serves as a reaction source and a circulating power source of the reactor, so that the degradation of organic matters in the reactor is accelerated and a necessary impelling force is provided for separation of the nanofiltration membrane.The reactor has the advantages of simpleness and convenience in operation, high mass transfer efficiency, low energy consumption, easiness in amplification and the like.

Description

technical field [0001] The invention relates to an oxidation nanofiltration membrane reactor and an oxidation method using the reactor. The reactor couples high-pressure ozone oxidation and nanofiltration membrane separation, and is especially suitable for deep oxidation treatment of refractory organic wastewater. technical background [0002] With the rapid development of industrial and agricultural production, the discharge of sewage and wastewater has increased dramatically. Especially the wastewater discharged from chemical industry, pesticide, dyestuff, medical food and other industries has brought serious water pollution, and most of the discharged wastewater contains organic substances that are difficult to biodegrade. For these organic wastewater, physical and chemical methods are mainly used for treatment. [0003] Physicochemical methods include unit operations such as membrane separation, adsorption, and air flotation. It mainly relies on mechanical, density, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/78
Inventor 景文珩徐辉石风强邢卫红徐南平
Owner 南京工大釜鼎能源技术有限公司
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