Micro-electrolysis synergistic Fenton catalytic oxidation reactor

Abstract

The utility model discloses a micro-electrolysis synergistic Fenton catalytic oxidation reactor. The micro-electrolysis synergistic Fenton catalytic oxidation reactor comprises a catalytic oxidation reactor and an integrated fluidized coagulation reaction settling tower, the catalytic oxidation reactor is provided with a first pipeline mixer, a second pipeline mixer, a water distributor, a mixing area, a micro-electrolysis filler area, a deep catalytic oxidation reaction area, an overflow port and a first water outlet groove; acid liquor, hydrogen peroxide and wastewater are mixed through a first pipeline mixer and a second pipeline mixer, the second pipeline mixer is connected with a water inlet of a water distributor arranged at the bottom of the mixing area, and the mixing area, the micro-electrolysis filler area and the deep catalytic oxidation reaction area are sequentially communicated. In the deep catalytic oxidation reaction zone, water overflows to a first water outlet tank through an overflow port, and effluent is discharged after being subjected to coagulating sedimentation treatment by the integrated fluidized coagulation reaction sedimentation tower. According to the wastewater treatment device, pollutants such as refractory organic matters in wastewater are efficiently degraded and removed by exerting the synergistic effect of microelectrolysis and Fenton technologies, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a micro-electrolysis synergistic Fenton catalytic oxidation reactor. Background Technology

[0002] Biological treatment technology, as a core process in modern wastewater treatment systems, has proven highly effective in reducing the load of pollutants such as organic matter in wastewater. However, with increasingly stringent environmental regulations, industrial wastewater often fails to meet discharge standards even after secondary biological treatment, necessitating the development of efficient advanced treatment systems. Taking pulp and paper wastewater as an example, its high concentration of lignin degradation byproducts exhibits significant biological resistance. Even after secondary treatment, the residual recalcitrant lignin derivatives in the water still far exceed national limits, requiring tertiary advanced treatment processes to mitigate environmental risks. It is noteworthy that current industrial wastewater advanced treatment technologies generally face the dual challenges of high operating costs and limited treatment efficiency, which have become a technological bottleneck restricting the sustainable development of the industry. Summary of the Invention

[0003] To overcome the defects and shortcomings of existing technologies, this invention provides a micro-electrolysis synergistic Fenton catalytic oxidation reactor. The reactor of this invention is simple, compact, efficient, flexible, and highly adaptable. By leveraging the synergistic effect of micro-electrolysis and Fenton technology, it efficiently degrades and removes recalcitrant organic pollutants and other pollutants from wastewater, thereby improving the efficiency of wastewater treatment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides a micro-electrolysis synergistic Fenton catalytic oxidation reactor, comprising: a catalytic oxidation reactor and an integrated fluidized bed coagulation reaction sedimentation tower;

[0006] The catalytic oxidation reactor is equipped with a first pipeline mixer, a second pipeline mixer, a water distributor, a mixing zone, a micro-electrolysis packing zone, a deep catalytic oxidation reaction zone, an overflow outlet, and a first outlet tank.

[0007] The first pipeline mixer is used to mix acid with wastewater, and the second pipeline mixer is used to mix hydrogen peroxide with wastewater;

[0008] The first pipeline mixer is connected to the second pipeline mixer, the second pipeline mixer is connected to the inlet of the water distributor, the water distributor is located at the bottom of the mixing zone, the mixing zone is connected to the micro-electrolysis packing zone, the micro-electrolysis packing zone is connected to the deep catalytic oxidation reaction zone, the deep catalytic oxidation reaction zone is connected to the overflow port, and the overflow port is connected to the first outlet tank.

[0009] The first effluent tank is connected to an integrated fluidized bed coagulation reaction sedimentation tower, which is used to treat the water after it has been treated by the catalytic oxidation reactor by coagulation and sedimentation before discharging it.

[0010] As a preferred technical solution, the micro-electrolysis packing area is provided with multiple backwash water pipes and multiple aeration pipes.

[0011] As a preferred technical solution, the mixing zone, the micro-electrolysis packing zone, and the deep catalytic oxidation reaction zone are connected sequentially according to the water flow direction, and the input wastewater is treated in a hierarchical nested manner.

[0012] As a preferred technical solution, the first pipeline mixer is connected to an acid inlet pipe, and the second pipeline mixer is connected to a hydrogen peroxide inlet pipe.

[0013] As a preferred technical solution, the integrated fluidized coagulation reaction sedimentation tower is provided with an inlet pump, a third pipeline mixer, a fourth pipeline mixer, a jet inlet, a fluidized reaction zone, a floc growth reaction zone, a floc separation sedimentation zone, a sludge thickening zone, a clarified water zone, and a second effluent tank connected in sequence.

[0014] The first effluent tank of the catalytic oxidation reactor is connected to the influent pump of the integrated fluidized coagulation reaction sedimentation tower;

[0015] The third pipeline mixer is used to mix the alkali solution with the influent, and the fourth pipeline mixer is used to mix the PAM solution with the influent.

[0016] As a preferred technical solution, the fluidization reaction zone, floc growth reaction zone, floc separation and sedimentation zone, sludge thickening zone, and clarification water zone are arranged sequentially according to the water flow direction, and a nested arrangement is adopted.

[0017] As a preferred technical solution, the integrated fluidized coagulation reaction sedimentation tower is also equipped with an overflow port, the clarified water zone is connected to the overflow port, and the overflow port is connected to the second outlet tank.

[0018] As a preferred technical solution, the second water outlet tank is equipped with a water outlet pipe for discharging the effluent treated by the integrated fluidized coagulation reaction sedimentation tower.

[0019] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0020] (1) This invention sets up a mixing zone, a micro-electrolysis packing zone, and a deep catalytic oxidation reaction zone in the catalytic oxidation reactor. It utilizes the micro-electrolysis reaction and the ferrous ions generated to catalyze hydrogen peroxide to produce hydroxyl radicals with strong oxidizing power, thus constructing a multi-stage catalytic oxidation reaction zone. The micro-electrolysis reaction and the preliminary Fenton reaction are carried out in the micro-electrolysis packing zone, followed by the deep Fenton reaction in the deep catalytic oxidation reaction zone. By leveraging the synergistic effect of the micro-electrolysis reaction and the two-stage Fenton reaction based on hydroxyl radicals, the recalcitrant organic pollutants in the wastewater are efficiently degraded and removed, effectively improving the efficiency of wastewater treatment and the operating efficiency of the reactor. It also makes the reactor simple, compact, efficient, flexible, and highly adaptable.

[0021] (2) The integrated fluidized coagulation reaction sedimentation tower of this utility model is arranged in sequence according to the water flow direction, including fluidized reaction zone, floc growth reaction zone, floc separation sedimentation zone, sludge thickening zone and clarification water zone. Different water flow velocities are controlled by structural design to generate different fluidization levels, and the wastewater is coagulated to form an integrated vertical reaction tower with neutralization, coagulation, sedimentation and purification functions, which improves the effect of coagulation and sedimentation. Coagulation and sedimentation is part of the Fenton reaction, which further improves the efficiency of wastewater treatment and the operating efficiency of the reactor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the micro-electrolysis synergistic Fenton catalytic oxidation reactor of this invention.

[0023] Among them, 1-catalytic oxidation reactor, 2-mixing zone, 3-micro-electrolysis packing zone, 4-deep catalytic oxidation reaction zone, 5-first effluent tank, 6-first pipeline mixer, 7-second pipeline mixer, 8-water distributor, 9-inlet pump, 10-third pipeline mixer, 11-fourth pipeline mixer, 12-integrated fluidized bed coagulation reaction sedimentation tower, 121-fluidized bed reaction zone, 122-flocculation growth reaction zone, 123-flocculation separation sedimentation zone, 124-sludge thickening zone, 125-clarified water zone, 126-jet inlet, 13-second effluent tank, 14-backwash water pipe, 15-aeration pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] Example

[0026] like Figure 1As shown, this embodiment provides a micro-electrolysis synergistic Fenton catalytic oxidation reactor, including: a catalytic oxidation reactor 1 and an integrated fluidized coagulation reaction sedimentation tower 12;

[0027] In this embodiment, the catalytic oxidation reactor is provided with a first pipeline mixer 6, a second pipeline mixer 7, a water distributor 8, a mixing zone 2, a micro-electrolysis packing zone 3, a deep catalytic oxidation reaction zone 4, an overflow port, and a first outlet tank 5;

[0028] The overflow outlet is located at the top of the catalytic oxidation reactor, and the first water outlet tank 5 is located on the upper outer side of the catalytic oxidation reactor.

[0029] In this embodiment, the wastewater inlet pipe is connected to the first pipe mixer 6, the first pipe mixer 6 is connected to the second pipe mixer 7, the second pipe mixer 7 is connected to the inlet of the water distributor 8, and the water distributor 8 is set at the bottom of the mixing zone of the catalytic oxidation reactor to achieve uniform water distribution in the mixing zone.

[0030] In this embodiment, the first pipeline mixer 6 is connected to the acid inlet pipe, through which the acid is mixed evenly with the wastewater in the water inlet pipe. The second pipeline mixer 7 is connected to the hydrogen peroxide inlet pipe, through which the hydrogen peroxide is mixed evenly with the wastewater in the water inlet pipe. The water mixed by the first pipeline mixer 6 and the second pipeline mixer 7 enters the mixing zone 2, the micro-electrolysis packing zone 3 and the deep catalytic oxidation reaction zone 4 in sequence through the water distributor 8 to carry out the micro-electrolysis synergistic Fenton catalytic oxidation reaction.

[0031] In this embodiment, the mixing zone 2, the micro-electrolysis packing zone 3, and the deep catalytic oxidation reaction zone 4 are arranged and connected sequentially according to the water flow direction. The input wastewater is treated in a hierarchical nested manner. The deep catalytic oxidation reaction zone is connected to the overflow port, which is connected to the first effluent tank 5. The overflow port overflows the water treated by the mixing zone 2, the micro-electrolysis packing zone 3, and the deep catalytic oxidation reaction zone 4 to the inlet of the first effluent tank 5. The overflow port overflows the water treated by the catalytic oxidation reactor to the first effluent tank 5. The first effluent tank 5 discharges the effluent treated by the catalytic oxidation reactor.

[0032] In this embodiment, the micro-electrolysis packing area is provided with micro-electrolysis packing, as well as multiple backwash water pipes 14 and multiple aeration pipes 15. Both the backwash water pipes and aeration pipes serve the purpose of backwashing, which is to periodically remove the trapped suspended particles and prevent the packing layer from becoming clogged.

[0033] In this embodiment, the integrated fluidized coagulation reaction sedimentation tower 12 is equipped with: an inlet pump 9, a third pipeline mixer 10, a fourth pipeline mixer 11, a jet inlet 126, a fluidized reaction zone 121, a floc growth reaction zone 122, a floc separation sedimentation zone 123, a sludge thickening zone 124, a clarified water zone 125, and a second effluent tank 13.

[0034] The outlet of the first effluent tank 5 of the catalytic oxidation reactor is connected to the influent pump 9 of the integrated fluidized coagulation reaction sedimentation tower. The influent pump 9 is connected to the third pipeline mixer 10. The third pipeline mixer 10 is connected to the fourth pipeline mixer 11. The third pipeline mixer 10 is connected to the alkali inlet pipe to mix the alkali solution with the influent evenly. The fourth pipeline mixer 11 is connected to the PAM solution inlet pipe to mix the PAM solution with the influent evenly. The fourth pipeline mixer 11 is connected to the jet inlet 126.

[0035] After being mixed by the third pipeline mixer 10 and the fourth pipeline mixer 11, the effluent enters the fluidized bed reaction zone 121, the floc growth reaction zone 122, the floc separation and sedimentation zone 123, the sludge thickening zone 124, and the clarified water zone 125 sequentially through the jet inlet 126. In this embodiment, the fluidized bed reaction zone 121, the floc growth reaction zone 122, the floc separation and sedimentation zone 123, the sludge thickening zone 124, and the clarified water zone 125 are arranged sequentially according to the direction of water flow. Different water flow velocities are controlled through structural design to generate different fluidization levels, thereby coagulating the wastewater and forming an integrated vertical reaction tower with neutralization, coagulation, sedimentation, and purification functions.

[0036] The second effluent tank 13 is located on the upper outer side of the integrated fluidized bed coagulation reaction sedimentation tower. The top of the integrated fluidized bed coagulation reaction sedimentation tower is connected to the second effluent tank 13 through an overflow port. The overflow port will allow the effluent treated by the coagulation reaction sedimentation tower to overflow into the second effluent tank 13. The second effluent tank 13 is equipped with an effluent pipe, and the effluent treated by the integrated fluidized bed coagulation reaction sedimentation tower is discharged from the effluent pipe through the second effluent tank 13.

[0037] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A micro-electrolysis synergistic Fenton catalytic oxidation reactor, characterized in that, include: Catalytic oxidation reactor and integrated fluidized bed coagulation reaction sedimentation tower; The catalytic oxidation reactor is equipped with a first pipeline mixer, a second pipeline mixer, a water distributor, a mixing zone, a micro-electrolysis packing zone, a deep catalytic oxidation reaction zone, an overflow outlet, and a first outlet tank. The first pipeline mixer is used to mix acid with wastewater, and the second pipeline mixer is used to mix hydrogen peroxide with wastewater; The first pipeline mixer is connected to the second pipeline mixer, the second pipeline mixer is connected to the inlet of the water distributor, the water distributor is located at the bottom of the mixing zone, the mixing zone is connected to the micro-electrolysis packing zone, the micro-electrolysis packing zone is connected to the deep catalytic oxidation reaction zone, the deep catalytic oxidation reaction zone is connected to the overflow port, and the overflow port is connected to the first outlet tank. The first effluent tank is connected to an integrated fluidized bed coagulation reaction sedimentation tower, which is used to treat the water after it has been treated by the catalytic oxidation reactor by coagulation and sedimentation before discharging it.

2. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 1, characterized in that, The micro-electrolysis packing area is equipped with multiple backwash water pipes and multiple aeration pipes.

3. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 1, characterized in that, The mixing zone, micro-electrolysis packing zone, and deep catalytic oxidation reaction zone are connected sequentially according to the water flow direction, and the input wastewater is treated in a hierarchical nested manner.

4. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 1, characterized in that, The first pipeline mixer is connected to an acid inlet pipe, and the second pipeline mixer is connected to a hydrogen peroxide inlet pipe.

5. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 1, characterized in that, The integrated fluidized bed coagulation reaction sedimentation tower is equipped with an inlet pump, a third pipeline mixer, a fourth pipeline mixer, a jet inlet, a fluidized bed reaction zone, a floc growth reaction zone, a floc separation sedimentation zone, a sludge thickening zone, a clarified water zone, and a second effluent tank, which are connected in sequence. The first effluent tank of the catalytic oxidation reactor is connected to the influent pump of the integrated fluidized coagulation reaction sedimentation tower; The third pipeline mixer is used to mix the alkali solution with the influent, and the fourth pipeline mixer is used to mix the PAM solution with the influent.

6. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 5, characterized in that, The fluidization reaction zone, floc growth reaction zone, floc separation and sedimentation zone, sludge thickening zone, and clarification water zone are arranged sequentially according to the direction of water flow, using a nested arrangement.

7. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 5, characterized in that, The integrated fluidized bed coagulation reaction sedimentation tower is also equipped with an overflow port, the clarified water zone is connected to the overflow port, and the overflow port is connected to the second outlet tank.

8. The micro-electrolysis synergistic Fenton catalytic oxidation reactor according to claim 5, characterized in that, The second effluent tank is equipped with an effluent pipe for discharging the effluent treated by the integrated fluidized bed coagulation reaction sedimentation tower.

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