A uv-coupled fenton fluidized catalytic oxidation reaction system

Abstract

The utility model discloses a kind of UV coupling Fenton fluidization catalytic oxidation reaction systems, including catalytic oxidation reactor and integrated fluidization coagulation reaction precipitation tower;Catalytic oxidation reactor is equipped with sequentially connected first pipeline mixer, second pipeline mixer, third pipeline mixer, first injection water inlet, multiple catalytic oxidation reaction zones, overflow and circulating effluent tank, and catalytic oxidation reaction zone is equipped with ultraviolet generating device, and acid liquor, ferrous salt solution, hydrogen peroxide and wastewater are mixed respectively by multiple pipeline mixers, overflow is connected with the water inlet of circulating effluent tank, and the first water outlet of circulating effluent tank is connected with first injection water inlet;Second water outlet of circulating effluent tank is equipped with outlet pipe, and outlet pipe is connected with integrated fluidization coagulation reaction precipitation tower, and effluent is discharged after coagulation and precipitation treatment by integrated fluidization coagulation reaction precipitation tower.The utility model improves the efficiency of wastewater treatment by exerting the synergistic effect between multiple advanced oxidation technologies.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a UV-coupled Fenton fluidized bed catalytic oxidation reaction system. Background Technology

[0002] Biological treatment technology has become the most important technical choice for wastewater treatment, effectively reducing the pollution load of organic matter and other pollutants in wastewater. However, with the continuous improvement of environmental protection standards, many industrial wastewaters cannot meet the discharge standards after secondary biological treatment and must undergo further advanced treatment. For example, pulp and paper wastewater contains high concentrations of lignin degradation products. Even after secondary treatment, it still contains high concentrations of recalcitrant lignin and other organic pollutants, which cannot meet national discharge standards and must undergo further treatment to mitigate the impact on the environment. However, current advanced industrial wastewater treatment technologies generally suffer from problems such as high treatment costs and low efficiency. Summary of the Invention

[0003] To overcome the defects and shortcomings of existing technologies, this invention provides a UV-coupled Fenton fluidized bed catalytic oxidation reaction system. The reaction system of this invention is simple, compact, efficient, flexible, and highly adaptable. By leveraging the synergistic effect of multiple advanced oxidation technologies, 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 UV-coupled Fenton fluidized bed catalytic oxidation reaction system, including a catalytic oxidation reactor and an integrated fluidized bed coagulation reaction sedimentation tower;

[0006] The catalytic oxidation reactor is provided with a first pipeline mixer, a second pipeline mixer, a third pipeline mixer, a first jet inlet, multiple catalytic oxidation reaction zones, an overflow outlet, and a circulating water tank connected in sequence. The catalytic oxidation reaction zone is equipped with an ultraviolet generator.

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

[0008] The overflow port is connected to the inlet of the circulating water tank. Water treated by the catalytic oxidation reactor overflows through the overflow port to the inlet of the circulating water tank. The first outlet of the circulating water tank is connected to the first jet inlet to transport circulating water into multiple catalytic oxidation reaction zones.

[0009] The second outlet of the circulating water tank is equipped with an outlet pipe, which is connected to an integrated fluidized coagulation reaction sedimentation tower. The integrated fluidized coagulation reaction sedimentation tower 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 multiple catalytic oxidation reaction zones are designated as a first catalytic oxidation reaction zone, a second catalytic oxidation reaction zone, and a third catalytic oxidation reaction zone. The first catalytic oxidation reaction zone, the second catalytic oxidation reaction zone, and the third catalytic oxidation reaction zone are arranged sequentially according to the water flow direction, and are arranged in a nested manner.

[0011] As a preferred technical solution, the first catalytic oxidation reaction zone is provided with a first ultraviolet generating device, and the second catalytic oxidation reaction zone is provided with a plurality of second ultraviolet generating devices.

[0012] As a preferred technical solution, the first outlet of the circulating water tank is connected to the first jet inlet through a pipe. A flow meter and a circulating water pump are connected in sequence on the connecting pipe between the circulating water tank and the first jet inlet. The flow meter is used to measure the circulating water volume, and the circulating water pump is used to transport the circulating water into the catalytic oxidation reaction zone.

[0013] 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 ferrous salt solution inlet pipe.

[0014] As a preferred technical solution, the integrated fluidized coagulation reaction sedimentation tower is provided with an inlet pump, a fourth pipeline mixer, a fifth pipeline mixer, a second 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 an outlet tank connected in sequence.

[0015] The outlet pipe of the circulating water tank of the catalytic oxidation reactor is connected to the inlet pump of the integrated fluidized coagulation reaction sedimentation tower.

[0016] The fourth pipeline mixer is used to mix the alkali solution with the influent, and the fifth pipeline mixer is used to mix the PAM solution with the influent.

[0017] 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.

[0018] As a preferred technical solution, an overflow port is also provided, the clarified water area is connected to the overflow port, and the overflow port is connected to the outlet tank.

[0019] As a preferred technical solution, the effluent tank is equipped with an effluent pipe for discharging the effluent treated by the integrated fluidized coagulation reaction sedimentation tower.

[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0021] (1) The catalytic oxidation reactor of this utility model mixes acid, ferrous salt solution, hydrogen peroxide and wastewater through a first pipe mixer, a second pipe mixer and a third pipe mixer, and sets up multiple catalytic oxidation reaction zones. Each catalytic oxidation reaction zone is equipped with an ultraviolet generator. Since ferrous salt solution and hydrogen peroxide, as well as ultraviolet light (UV) and hydrogen peroxide, can promote the generation of hydroxyl radicals, the reactor utilizes the synergistic effects of ultraviolet light (UV), hydrogen peroxide and ferrous salt solution, and based on the synergistic effects of multiple advanced oxidation technologies, it efficiently degrades and removes pollutants such as recalcitrant organic matter in wastewater.

[0022] (2) The catalytic oxidation reactor of this utility model is provided with a first catalytic oxidation reaction zone, a second catalytic oxidation reaction zone and a third catalytic oxidation reaction zone. In the first catalytic oxidation reaction zone and the second catalytic oxidation reaction zone, ultraviolet light (UV), hydrogen peroxide and ferrous salt solution have a synergistic effect to generate high concentration of free radicals, which efficiently degrade the pollutants such as recalcitrant organic matter in the wastewater. In the third catalytic oxidation reaction zone, ferrous salt solution and hydrogen peroxide further synergistically generate free radicals, which further degrade the pollutants such as recalcitrant organic matter in the wastewater. The first catalytic oxidation reaction zone, the second catalytic oxidation reaction zone and the third catalytic oxidation reaction zone are set in sequence according to the water flow direction, and a nested arrangement is adopted. By setting up multiple catalytic oxidation reaction zones in the reactor, the efficiency of wastewater treatment and the operating efficiency of the reactor are effectively improved. Moreover, the catalytic oxidation reactor has a simple and compact structure, is highly efficient and flexible and has strong adaptability.

[0023] (3) The catalytic oxidation reactor of this utility model connects the first outlet of the circulating water tank with the first jet inlet to transport circulating water into the first catalytic oxidation reaction zone. Furthermore, the amount of circulating water entering the first catalytic oxidation reaction zone is regulated by a flow meter and a circulating water pump, so that the first catalytic oxidation reaction zone and the second catalytic oxidation reaction zone are fluidized, which further improves the efficiency of wastewater treatment and sterilization and the operating efficiency of the reactor.

[0024] (4) 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

[0025] Figure 1 This is a schematic diagram of the structure of the UV-coupled Fenton fluidized bed catalytic oxidation reaction system of this utility model.

[0026] Among them, 1-catalytic oxidation reactor, 2-first jet inlet, 3-first ultraviolet generator, 4-second ultraviolet generator, 5-first catalytic oxidation reaction zone, 6-second catalytic oxidation reaction zone, 7-third catalytic oxidation reaction zone, 8-circulating effluent tank, 9-flow meter, 10-circulating water pump, 11-first pipeline mixer, 12-second pipeline mixer, 13-third pipeline mixer, 14-effluent pipe, 15-inlet pump, 16-fourth pipeline mixer, 17-fifth pipeline mixer, 18-integrated fluidized bed coagulation reaction sedimentation tower, 181-fluidized bed reaction zone, 182-flocculation growth reaction zone, 183-flocculation separation sedimentation zone, 184-sludge thickening zone, 185-clarified water zone, 186-second jet inlet, 19-effluent tank. Detailed Implementation

[0027] 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.

[0028] Example

[0029] like Figure 1 As shown, this embodiment provides a UV-coupled Fenton fluidized bed catalytic oxidation reaction system, including: a catalytic oxidation reactor 1 and an integrated fluidized bed coagulation reaction sedimentation tower 18;

[0030] In this embodiment, the catalytic oxidation reactor 1 is provided with a first pipeline mixer 11, a second pipeline mixer 12, a third pipeline mixer 13, a first jet inlet 2, a first catalytic oxidation reaction zone 5, a second catalytic oxidation reaction zone 6, a third catalytic oxidation reaction zone 7, an overflow outlet, and a circulating water tank 8. The overflow outlet is located at the top of the catalytic oxidation reactor, and the circulating water tank is located on the upper outer side of the catalytic oxidation reactor.

[0031] The inlet pipe is connected to the first pipe mixer 11, the first pipe mixer 11 is connected to the second pipe mixer 12, the second pipe mixer 12 is connected to the third pipe mixer 13, and the third pipe mixer 13 is connected to the first jet inlet 2. The first pipe mixer 11 is connected to an acid inlet pipe for mixing acid and wastewater evenly. The second pipe mixer 12 is connected to a ferrous salt solution inlet pipe for mixing ferrous salt solution and wastewater evenly. The third pipe mixer 13 is connected to a hydrogen peroxide inlet pipe for mixing hydrogen peroxide and wastewater evenly.

[0032] In this embodiment, the first catalytic oxidation reaction zone 5, the second catalytic oxidation reaction zone 6, and the third catalytic oxidation reaction zone 7 are arranged sequentially according to the water flow direction. They can be arranged in a nested manner to treat the input wastewater in stages.

[0033] The input wastewater enters the first catalytic oxidation reaction zone 5, the second catalytic oxidation reaction zone 6 and the third catalytic oxidation reaction zone 7 sequentially through the first jet inlet 2. The first catalytic oxidation reaction zone 5 is equipped with a first ultraviolet generator 3, and the second catalytic oxidation reaction zone 6 is equipped with a second ultraviolet generator 4. Preferably, one first ultraviolet generator is provided, and multiple second ultraviolet generators are provided, preferably four or more.

[0034] In this embodiment, the overflow port is connected to the circulating water tank 8. After the wastewater is treated in three reaction zones in sequence, the water treated by the catalytic oxidation reactor overflows to the inlet of the circulating water tank through the overflow port.

[0035] The first outlet of the circulating water tank 8 is connected to the first injection inlet 2 at the bottom of the catalytic oxidation reactor via a pipe. A flow meter 9 and a circulating water pump 10 are connected in sequence on the connecting pipe between the circulating water tank and the first injection inlet. The flow meter 9 is used to measure the circulating water volume, and the circulating water pump 10 is used to transport the circulating water into the catalytic oxidation reactor to realize the water return and obtain the upward flow velocity of the water required for fluidization.

[0036] In this embodiment, the second outlet of the circulating water tank is also provided with an outlet pipe 14 for discharging the effluent treated by the catalytic oxidation reactor.

[0037] In this embodiment, the integrated fluidized coagulation reaction sedimentation tower 18 is equipped with an inlet pump 15, a fourth pipeline mixer 16, a fifth pipeline mixer 17, a second jet inlet 186, a fluidized reaction zone 181, a floc growth reaction zone 182, a floc separation sedimentation zone 183, a sludge thickening zone 184, a clarified water zone 185, and an outlet tank 19.

[0038] Among them, the outlet pipe 14 of the circulating water tank of the catalytic oxidation reactor is connected to the inlet pump 15 of the integrated fluidized coagulation reaction sedimentation tower. The inlet pump 15 is connected to the fourth pipeline mixer 16. The fourth pipeline mixer is connected to the fifth pipeline mixer 17. The fourth pipeline mixer is connected to the alkali inlet pipe to mix the alkali solution and the inlet water evenly. The fifth pipeline mixer is connected to the PAM solution inlet pipe to mix the PAM solution and the inlet water evenly. The fifth pipeline mixer is connected to the second jet inlet.

[0039] After being mixed by the fourth and fifth pipeline mixers, the effluent enters the fluidized bed reaction zone 181, the floc growth reaction zone 182, the floc separation and sedimentation zone 183, the sludge thickening zone 184, and the clarified water zone 185 sequentially through the second jet inlet 186. In this embodiment, the fluidized bed reaction zone 181, the floc growth reaction zone 182, the floc separation and sedimentation zone 183, the sludge thickening zone 184, and the clarified water zone 185 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.

[0040] The effluent trough 19 is located on the upper outer side of the integrated fluidized coagulation reaction sedimentation tower. The top of the integrated fluidized coagulation reaction sedimentation tower is connected to the effluent trough through an overflow port. The effluent trough is equipped with an effluent pipe. The effluent treated by the integrated fluidized coagulation reaction sedimentation tower is discharged from the effluent pipe through the effluent trough.

[0041] 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 UV-coupled Fenton fluidized bed catalytic oxidation reaction system, characterized in that, Includes a catalytic oxidation reactor and an integrated fluidized bed coagulation reaction sedimentation tower; The catalytic oxidation reactor is provided with a first pipeline mixer, a second pipeline mixer, a third pipeline mixer, a first jet inlet, multiple catalytic oxidation reaction zones, an overflow outlet, and a circulating water tank connected in sequence. The catalytic oxidation reaction zone is equipped with an ultraviolet generator. The first pipeline mixer is used to mix acid solution with wastewater, the second pipeline mixer is used to mix ferrous salt solution with wastewater, and the third pipeline mixer is used to mix hydrogen peroxide with wastewater; The overflow port is connected to the inlet of the circulating water tank. Water treated by the catalytic oxidation reactor overflows through the overflow port to the inlet of the circulating water tank. The first outlet of the circulating water tank is connected to the first jet inlet to transport circulating water into multiple catalytic oxidation reaction zones. The second outlet of the circulating water tank is equipped with an outlet pipe, which is connected to an integrated fluidized coagulation reaction sedimentation tower. The integrated fluidized coagulation reaction sedimentation tower 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 UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 1, characterized in that, The multiple catalytic oxidation reaction zones are designated as a first catalytic oxidation reaction zone, a second catalytic oxidation reaction zone, and a third catalytic oxidation reaction zone. These zones are arranged sequentially according to the water flow direction, using a nested arrangement.

3. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 2, characterized in that, The first catalytic oxidation reaction zone is equipped with a first ultraviolet generating device, and the second catalytic oxidation reaction zone is equipped with multiple second ultraviolet generating devices.

4. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 1, characterized in that, The first outlet of the circulating water tank is connected to the first jet inlet via a pipe. A flow meter and a circulating water pump are connected in sequence on the connecting pipe between the circulating water tank and the first jet inlet. The flow meter is used to measure the circulating water volume, and the circulating water pump is used to transport the circulating water into the catalytic oxidation reaction zone.

5. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system 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 ferrous salt solution inlet pipe.

6. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 1, characterized in that, The integrated fluidized bed coagulation reaction sedimentation tower is equipped with an inlet pump, a fourth pipeline mixer, a fifth pipeline mixer, a second 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 an outlet tank, which are connected in sequence. The outlet pipe of the circulating water tank of the catalytic oxidation reactor is connected to the inlet pump of the integrated fluidized coagulation reaction sedimentation tower. The fourth pipeline mixer is used to mix the alkali solution with the influent, and the fifth pipeline mixer is used to mix the PAM solution with the influent.

7. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 6, 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.

8. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 6, characterized in that, An overflow outlet is also provided, the clarified water area is connected to the overflow outlet, and the overflow outlet is connected to the water outlet tank.

9. The UV-coupled Fenton fluidized bed catalytic oxidation reaction system according to claim 6, characterized in that, The 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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