Three-phase bicirculating ozone catalytic fluidized bed and wastewater treatment method thereof

Abstract

The invention discloses a three-phase bicirculating ozone catalytic fluidized bed, and a wastewater treatment method thereof. The three-phase bicirculating ozone catalytic fluidized bed comprises a water inlet pipe, a boosting backflow pump, a jet aerator, a bed body, an ozone generator and a water outlet pipe, wherein the water inlet pipe is connected with the boosting backflow pump, the boosting backflow pump is connected with the jet aerator, the jet aerator is connected with the bed body, the bed body is equipped with the water outlet pipe, the ozone generator is arranged between the jet aerator and the bed body, and a backflow pipe is arranged between the water inlet pipe and the water outlet pipe; a gas dissipation layer, a circulating backflow external drum, a sedimentation backflow chamber, a filtration clean liquid chamber and a guiding internal drum are arranged inside the bed body, the circulating backflow external drum is arranged below the gas dissipation layer, the circulating backflow external drum is connected with the sedimentation backflow chamber, and the filtration clean liquid chamber is arranged below the sedimentation backflow chamber. Based on a high-technology multi-discipline combined process form, the three-phase bicirculating ozone catalytic fluidized bed effectively solves the treatment problem of the wastewater containing refractory organic matters, and has the characteristics of no secondary pollution, good treatment effect and low cost.

Description

technical field [0001] The invention relates to a wastewater treatment device and its technology, in particular to a three-phase double-circulation ozone catalytic fluidized bed and a wastewater treatment method thereof. Background technique [0002] At present, most industrial wastewater still contains a certain amount of COD and other organic matter, and its value exceeds the discharge limit permitted by the new standard. At present, in the field of wastewater treatment, there is no very efficient process for the treatment of low-concentration refractory organic matter. Commonly used methods include activated carbon adsorption, chemical oxidation, and ozone oxidation. [0003] The activated carbon adsorption method is simple in operation, quick in effect, and low in equipment investment; however, the activated carbon needs to be replaced regularly, which is labor-intensive and high in operating costs (the adsorption capacity is about 0.08kgCOD / kg). Moreover, among the reg...

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Problems solved by technology

At this stage, in the field of wastewater treatment, there is no very efficient process for the treatment of low-concentration refractory organic matter. Commonly used methods include activated carbon adsorption, chemical oxidation, and ozone oxidation.

[0003] The activated carbon adsorption method is simple in operation, quick in effect, and low in equipment investment; however, the activated carbon needs to be replaced regularly, which is labor-intensive and high in operating costs (the adsorption capacity is about 0.08kgCOD / kg)

Moreover, among the regeneration methods of activated carbon, the traditional high-temperature activation method has the highest recovery rate, and other normal temperature or low temperature methods have unsatisfactory effects, which is a major obstacle restricting the application of activated carbon adsorption technology.

[0004] The advantage of the chemical oxidation method is that it can completely remove organic matter and improve the biodegradability of the effluent; the disadvantage is that the process control is complicated, the equipment material requirements are high, and the amount of sludge generated is large, and a sedimentation tank needs to be configured in the follow-up

[0005] The advantages of the ozone oxidation method are that the decolorization effect is good, the system equipment is highly automated, and no sludge is generated; the disadvantage is that the system consumes a lot of energy and requires a large investment

In the simple ozone oxidation process, the traditional method is the application of empty tower jet mixing or bubble tower, and the utilization rate of ozone is low. Moreover, this method is mostly used in ozone sterilization and disinfection processes, and is not suitable for the process of degrading organic matter. in process

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