Fluidized bed Fenton reactor and method

Abstract

The invention discloses a fluidized bed Fenton reactor and a method, solves the problems of crystalline loss and non-uniform water distribution in the prior art, and has the beneficial effects that the operating cost is reduced and the removal rate of refractory organics in sewage is improved. Through the scheme, the fluidized bed Fenton reactor comprises a reaction tank body, wherein a catalyst inlet for raw water and a catalyst to come into and an oxidant inlet for raw water and an oxidant to come into are formed in the bottom of the reaction tank body; the catalyst inlet is connected with a first water distribution head; the oxidant inlet is connected with a second water distribution head; a micropore aerator head is arranged on the side of the first water distribution head inside the reaction tank body; a main reaction area is arranged above the micropore aerator head inside the reaction tank body; a filler is arranged inside the main reaction area; and a three-phase separator is arranged above the main reaction area.

Description

technical field [0001] The invention relates to the field of environmental protection equipment, in particular to a fluidized bed Fenton reactor and a method. Background technique [0002] In sewage treatment, especially in some industrial sewage treatment, some water quality that is difficult to degrade biochemically is often encountered. At present, the common methods to deal with these water quality are: [0003] 1. Advanced oxidation methods, including ozone oxidation, Fenton reagent oxidation, hydrogen peroxide oxidation, etc., directly oxidize and degrade refractory organic matter in wastewater; [0004] 2. Micro-electrolysis methods, such as iron-carbon micro-electrolysis, use the electrons generated by micro-electrolysis to open some groups of organic matter and decompose them into small molecular substances, which is beneficial to subsequent biochemical treatment; [0005] 3. Distillation method, distilling high-concentration salt-containing mother liquor, etc., to...

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Problems solved by technology

[0010] First, in order to keep the crystals in the sewage in a fluidized state, the waste water needs to maintain a relatively high flow rate, and in order to ensure a certain reaction time, it is generally used to increase the flow rate of the waste water to increase the flow rate, which increases the energy consumption;

[0011] Second, due to the inconsistent size and density of the crystals in the water, some crystals will be lost with the effluent, affecting the quality of the effluent and increasing the difficulty and cost of subsequent treatment;

[0012] The third is that the most uniform water distribution method is the multi-point water distribution method. However, since the lengths of the pipelines to each point are different, the number and size of the elbows and variable diameters used are also different, so it is difficult to ensure that the distribution of water at each point The water volume is consistent, so the flow rate in the tank is not uniform, and the fluidization effect is not good;

[0013] Fourth, the oxidant and catalyst in the Fenton reactor are mixed before the main reaction zone, and the prematurely generated hydroxyl radicals cause oxidation and corrosion to pipelines, pipe fittings and equipment, and also reduce the efficiency of removing refractory organic matter in water

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