Activated carbon fiber for treating oily wastewater as well as regeneration method and device of activated carbon fiber

Abstract

The invention discloses a method and device for treating oily wastewater with activated carbon fiber and its regeneration method and device. Specifically, the method disclosed in the invention uses an electrochemical reaction device in which activated carbon fiber felt is used as the anode and mesh-shaped titanium metal is used as the cathode. The combination of adsorption-electrolysis-desorption of oil in oily wastewater and regeneration of activated carbon fibers was studied. This electrochemical reaction device is composed of a reactor, an electric mixer and an externally connected regulated DC power supply. The reactor is equipped with multiple sets of detachable anodes and cathodes. The anode is composed of activated carbon fiber felt as the main body and titanium-based metal oxide as the support. The net-like pure titanium metal is the cathode electrode, and the anode and cathode groups are alternately connected by wires. The power supply and the number of electrode groups can be disassembled to increase or decrease, and the number of electrode groups can be adjusted according to the processing requirements. Compared with the existing technology, the method of the present invention realizes the integration of activated carbon fiber electrochemical treatment of oily wastewater and its in-situ regeneration technology, prolongs the regeneration cycle, reduces the process flow and secondary pollution, is easy to operate and control, and is convenient industrial applications.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating oily waste water with activated carbon fibers and its regeneration method, and a supporting device according to the method. Background technique [0002] Oily wastewater comes from the processing, refining, storage and transportation of petroleum and oil products in the petroleum industry; cooling lubricants, rolling water, etc. produced in the process of machinery manufacturing; locomotive wastewater in the transportation industry, wastewater from oil washing tanks in railway locomotive depots, etc., food Wastewater from industry, textile industry and other manufacturing industries also contains a large amount of oil, which is extremely harmful to environmental protection and ecological balance. At present, the technologies for oily wastewater treatment mainly include physical methods, chemical methods, physicochemical methods and microbial methods...

AI Technical Summary

Problems solved by technology

However, at present, most activated carbon materials are regenerated by taking them out and placing them in regeneration equipment, which is not conducive to actual operation.

And there are multiple defects when treating oily wastewater with a single method: Chinese invention patent (ZL 01259205.6) discloses "a treatment device for oily wastewater"

The device uses a variety of lipophilic adsorption and filtration materials to treat oily wastewater. Although the oil removal rate reaches 99%, the adsorption and filtration materials used are lipophilic. After a period of treatment, it is easy to cause pore blockage, which requires continuous treatment. Replacing the adsorption filter material, the process is more cumbersome, and the post-treatment is more troublesome; Xu Zhida et al. ("Prospects for the Treatment of Oil Refinery Wastewater with Activated Carbon Fiber", Industrial Water Treatment, 1998, 18 (2)) used activated carbon to treat oil refinery wastewater, and then used 200°C- 500°C superheated steam is used for desorption and regeneration. Although the treatment and regeneration effects are good, the treatment and regeneration are processed in different devices, which is cumbersome and consumes a lot of energy; Chinese invention patent (ZL 03151224.0) discloses "An electrolytic oxidation treatment process for phenol-containing wastewater"

This process uses Ti-based PbO2 as the anode and stainless steel as the cathode to treat phenol-containing wastewater. Although the removal rates of volatile phenol and COD reach 93% and 90% respectively, when metal electrodes are used alone, the electrolytic Very easy to lose, and the current density is large, and the energy consumption is high; Huang Yaohui et al. The electro-Fenton method of producing Fe2+ and H2O2 at the anode to treat petrochemical wastewater has achieved good results, but The whole process has a high requirement on the pH value, and it is also accompanied by the reaction of electrocoagulation, which produces a large amount of sludge, which seriously affects the later treatment.

The key reason for the above-mentioned problems is that the existing technology lacks equipment and methods that can realize the combination of multiple wastewater treatment technologies and the regeneration of activated carbon materials in the same device.

Images