Advanced wastewater treatment device based on adsorption coupling catalytic oxidation

Abstract

The advanced wastewater treatment device comprises a primary adsorption tank, a catalytic ozonation tank and a secondary adsorption tank, a water outlet is formed in the top of the primary adsorption tank, and the primary adsorption tank is connected with a water inlet in the bottom of the catalytic ozonation tank through a pipeline; a water outlet pipeline of the first-stage adsorption tank is provided with a valve, a reflux pipeline and a reflux pump and is used for adjusting water flow and realizing partial reflux; a water outlet is formed in the top of the catalytic ozonation tank and connected with a water inlet in the bottom of the secondary adsorption tank through a pipeline, an exhaust port, a barometer and an exhaust pipeline with a valve are arranged at the top of the catalytic ozonation tank, and the exhaust pipeline is connected with a tail gas treatment device to ensure that waste gas is effectively treated. According to the advanced wastewater treatment system based on adsorption coupled catalytic oxidation, through coupling of two-stage adsorption and catalytic ozonation, the removal effect on new pollutants is remarkably improved, and the advanced wastewater treatment system is particularly suitable for treatment of refractory organics.

Description

Technical Field

[0001] This utility model relates to the field of wastewater deep treatment technology, specifically a wastewater deep treatment device based on adsorption coupled catalytic oxidation. Background Technology

[0002] With rapid industrialization and urbanization, the types of pollutants in wastewater are becoming increasingly complex, and new pollutants (such as perfluorinated compounds, endocrine disruptors, antibiotics, and microplastics) are constantly being discovered in the environment. These new pollutants are characterized by persistence, difficulty in degradation, and easy accumulation, making them difficult to effectively remove using existing secondary treatment technologies in wastewater treatment plants (such as combined physicochemical and biological treatment). Traditional wastewater treatment technologies typically suffer from low treatment efficiency, high operating costs, and numerous byproducts, failing to meet the requirements for economical, effective, and feasible practical wastewater treatment technologies. Utility Model Content

[0003] In order to overcome the problems and defects in the existing technology, this utility model provides a wastewater deep treatment device based on adsorption coupled catalytic oxidation. Through the coupling of two-stage adsorption and catalytic ozone oxidation, the removal effect of new pollutants is significantly improved. It has the advantages of high reaction efficiency, long adsorbent service life, low operating cost, and safety and reliability.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wastewater deep treatment device based on adsorption coupled catalytic oxidation, comprising a primary adsorption tank, an ozone catalytic oxidation tank, and a secondary adsorption tank. The primary adsorption tank has an outlet at the top, which is connected to the inlet at the bottom of the ozone catalytic oxidation tank via a pipe. The outlet pipe of the primary adsorption tank is equipped with a valve, a return pipe, and a return pump for regulating the water flow and achieving partial return. The ozone catalytic oxidation tank has an outlet at the top, which is connected to the inlet at the bottom of the secondary adsorption tank via a pipe. The catalytic oxidation tank has an exhaust port, a pressure gauge, and an exhaust pipe with a valve at the top. The exhaust pipe is connected to a tail gas treatment device to ensure that the waste gas is effectively treated.

[0005] The outlet pipe of the secondary adsorption tank is also equipped with valves, a return pipe and a return pump; the top of the primary and secondary adsorption tanks and the catalytic oxidation tank are all equipped with inspection ports and observation windows in the middle, which facilitates equipment maintenance and monitoring.

[0006] Preferably, the adsorbent used in the primary and secondary adsorption tanks can be one or more materials selected from granular activated carbon, biological activated carbon, or activated coke.

[0007] Preferably, the ozone catalytic oxidation tank is filled with a catalyst, which may be a transition metal oxide, a noble metal catalyst, or a composite catalyst, to enhance the oxidizing power of ozone and promote the degradation of new pollutants.

[0008] Compared with the prior art, the beneficial effects of this utility model are: the wastewater deep treatment device based on adsorption coupled catalytic oxidation:

[0009] 1. Highly efficient removal of new pollutants: Through the coupling of two-stage adsorption and catalytic ozone oxidation, the removal effect of new pollutants is significantly improved, especially suitable for the treatment of recalcitrant organic matter.

[0010] 2. Extend the service life of the adsorbent: The primary adsorption tank is mainly used to remove most of the organic matter and suspended solids that are difficult to remove through biochemical treatment, reducing the burden on the subsequent catalytic oxidation tank; the secondary adsorption tank is used to further remove intermediate products generated during the catalytic oxidation process, thus extending the service life of the adsorbent.

[0011] 3. Reduced operating costs: The design of the reflux system allows for full adjustment of the adsorption residence time, significantly improving adsorption efficiency and reducing the cost of adsorbent use.

[0012] 4. Safe and reliable: The catalytic oxidation tank is equipped with an exhaust port and a tail gas treatment device to ensure that the waste gas is effectively treated and to avoid secondary pollution. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Primary adsorption tank; 2. Ozone catalytic oxidation tank; 3. Secondary adsorption tank; 4. Outlet; 5. Inlet; 6. Valve; 7. Return pipe; 8. Return pump; 9. Exhaust port; 10. Barometer; 11. Exhaust pipe; 12. Tail gas treatment device; 13. Inspection port; 14. Observation window. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 This utility model provides a technical solution: a wastewater deep treatment device based on adsorption coupled catalytic oxidation, including a primary adsorption tank 1, an ozone catalytic oxidation tank 2 and a secondary adsorption tank 3. The primary adsorption tank 1 is provided with an outlet 4 at the top and is connected to the inlet 5 at the bottom of the ozone catalytic oxidation tank 2 through a pipe.

[0017] The outlet pipe of the primary adsorption tank 1 is equipped with a valve 6, a return pipe 7 and a return pump 8. The top of the ozone catalytic oxidation tank 2 is equipped with an outlet 4, which is connected to the inlet 5 at the bottom of the secondary adsorption tank 3 through a pipe. The top of the catalytic oxidation tank 2 is also equipped with an exhaust port 9, a pressure gauge 10 and an exhaust pipe 11 with a valve. The exhaust pipe 11 is connected to the exhaust gas treatment device 12.

[0018] The outlet pipe of the secondary adsorption tank 3 is also equipped with a valve 6, a return pipe 7 and a return pump 8. The top of the primary adsorption tank 1, the secondary adsorption tank 3 and the catalytic oxidation tank 2 are all equipped with an inspection port 13 and an observation window 14 in the middle.

[0019] In actual operation, the wastewater first enters the primary adsorption tank 1, where the adsorbent removes most of the organic matter and suspended solids that are difficult to biodegrade.

[0020] Subsequently, the wastewater enters the ozone catalytic oxidation tank 2. Under the action of the catalyst, ozone reacts with the new pollutants in the wastewater to degrade them into small molecules or mineralize them into carbon dioxide and water.

[0021] Finally, the wastewater enters the secondary adsorption tank 3 to further remove intermediate products generated during the catalytic oxidation process, ensuring that the effluent quality is further purified.

[0022] This invention significantly improves the removal efficiency of new pollutants by coupling two-stage adsorption with catalytic ozone oxidation. It has the advantages of high reaction efficiency, long adsorbent life, low operating cost, and safety and reliability, and is suitable for the deep treatment of various industrial wastewater and urban sewage.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for advanced treatment of wastewater based on adsorption coupling catalytic oxidation, characterized in that, The system includes a primary adsorption tank, an ozone catalytic oxidation tank, and a secondary adsorption tank. The primary adsorption tank has an outlet at the top, which is connected to the inlet at the bottom of the ozone catalytic oxidation tank via a pipe. The outlet pipe of the primary adsorption tank is equipped with a valve, a return pipe, and a return pump to regulate the water flow and achieve partial return. The ozone catalytic oxidation tank has an outlet at the top, which is connected to the inlet at the bottom of the secondary adsorption tank via a pipe. The catalytic oxidation tank has an exhaust port, a pressure gauge, and an exhaust pipe with a valve at the top. The exhaust pipe is connected to the exhaust gas treatment device to ensure that the waste gas is effectively treated. The outlet pipe of the secondary adsorption tank is also equipped with valves, a return pipe and a return pump; the top of the primary and secondary adsorption tanks and the catalytic oxidation tank are all equipped with inspection ports and observation windows in the middle, which facilitates equipment maintenance and monitoring.

2. The device for advanced treatment of wastewater based on adsorption coupling catalytic oxidation according to claim 1, characterized in that: The ozone catalytic oxidation tank is filled with a catalyst, which can be a transition metal oxide, a noble metal catalyst, or a composite catalyst, to enhance the oxidizing power of ozone and promote the degradation of new pollutants.

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