CN106882901A - A kind of B-grade sewage processes plant effluent advanced treatment system - Google Patents

Abstract

The invention relates to an advanced treatment system for effluent of a secondary sewage treatment plant, comprising a catalytic oxidation tank, a coagulation sedimentation tank, an adsorption filter tower and a clean water tank, wherein the catalytic oxidation tank, the coagulation sedimentation tank, the adsorption filter tower and the clean water tank are sequentially connected; The catalytic oxidation tank is equipped with a fluidization cylinder, and the lower part of the fluidization cylinder is provided with a catalytic oxidation tank water inlet pipe and a catalytic oxidation tank water distribution pipe. The lower part of the catalytic oxidation tank water distribution pipe is provided with an ozone aeration plate. The oxidation tank has a cylindrical structure; the coagulation sedimentation tank includes a mixing zone and a sedimentation zone, and the bottom of the sedimentation zone is designed as a conical structure, and a sediment discharge valve is set at the bottom of the sedimentation zone; , Adsorption filter tower cloth water pipe, filter material, filter material support frame, air inlet and adsorption filter tower outlet pipe.

Description

A secondary sewage treatment plant effluent advanced treatment system

technical field

The invention relates to the technical field of sewage treatment, in particular to an advanced treatment system for effluent of a secondary sewage treatment plant.

Background technique

With the acceleration of urbanization and industrialization in China, the demand for water resources is also increasing, and the phenomenon of water shortage in cities is becoming more and more serious. The scarcity of water resources has become an important factor restricting the sustainable development of urban economy and society. In order to alleviate the shortage of urban water resources and meet the needs of economic development and business needs, the use of secondary sewage treatment plant effluent as the second largest water source has become the only way for urban development. However, the effluent from most secondary sewage treatment plants only undergoes traditional secondary treatment, and the discharged water still contains a considerable amount of pollutants. If it is to be reused as fresh water, it must undergo advanced sewage treatment.

Experience at home and abroad shows that advanced sewage treatment methods can be roughly divided into three categories: biological treatment, physical and chemical treatment, and membrane treatment. Domestic sewage advanced treatment methods usually use biological treatment methods, as well as physical and chemical methods. After the urban sewage has undergone secondary treatment and advanced treatment, the water quality index of the reclaimed water fully meets the water quality requirements of the cooling supplementary water of the thermal power plant, the pulp rinsing water of the recycled paper mill and the urban miscellaneous water.

Common technologies for advanced sewage treatment such as coagulation technology, biological treatment technology, ozone method, membrane separation technology, advanced oxidation method, activated carbon adsorption technology, etc., most of the treatment methods have problems such as high economic cost and long treatment process.

At present, how to choose the appropriate technology to make it suitable for promotion in urban sewage treatment enterprises is the key to the management of advanced sewage treatment projects.

Contents of the invention

The technical problem to be solved by the present invention is: in order to solve the problem of treating the effluent of the above-mentioned secondary sewage treatment plant, the present invention provides an advanced treatment system for the effluent of the secondary sewage treatment plant.

The technical solution adopted by the present invention to solve the technical problem is: a secondary wastewater treatment plant effluent advanced treatment system, including a catalytic oxidation tank, a coagulation sedimentation tank, an adsorption filter tower and a clear water tank, a catalytic oxidation tank, a coagulation sedimentation tank , the adsorption filter tower and the clean water pool are connected in sequence.

The catalytic oxidation tank is provided with a fluidization cylinder, the upper part of the fluidization cylinder is cylindrical, the lower part of the fluidization cylinder is trumpet-shaped, the fluidization cylinder is located in the center of the catalytic oxidation tank, and the lower end of the fluidization cylinder The lower part of the oxidation tank, the upper opening is located in the middle of the catalytic oxidation tank, the lower part of the fluidization cylinder is provided with the water inlet pipe of the catalytic oxidation tank and the water distribution pipe of the catalytic oxidation tank, and the water distribution pipe of the catalytic oxidation tank is arranged in the shape of concentric circles; the catalytic oxidation tank The lower part of the water distribution pipe is provided with an ozone aeration pan, which is connected to an ozone blower, and the ozone blower is connected to an ozone generator through a pipeline.

The upper part of the catalytic oxidation tank is provided with a three-phase separator of the catalytic oxidation tank, and the three-phase separator of the catalytic oxidation tank includes a deflector and a triangular guide ring located below the deflector and used in conjunction with the deflector. The triangular deflector ring is installed on the inner wall of the catalytic oxidation tank, the upper part of the deflector is cylindrical, the lower part of the deflector is trumpet-shaped, and the inner diameter of the lower part of the deflector is larger than that of the triangular deflector. The inner diameter of the flow ring; the outer side of the guide plate is provided with a catalytic oxidation tank overflow weir, and the catalytic oxidation tank overflow weir is connected to the outlet pipe of the catalytic oxidation tank; the catalytic oxidation tank is filled with loaded activated carbon.

Specifically, the catalytic oxidation tank is a cylindrical structure, and an observation port and a maintenance and replacement port are provided on the cylindrical structure. The volume of the catalytic oxidation tank is determined according to the amount of water to be treated, and it is placed vertically .

The preparation method of described supported activated carbon is;

① Pass the activated carbon through a 24-mesh sieve and dry it at 105°C;

② Immerse the dried activated carbon in manganese nitrate solution with a mass concentration of 3-8% for 8-12 hours;

③ Dry the soaked activated carbon at 105°C;

④The activated carbon dried in step ③ is raised to 400-600°C at 10°C/min, calcined for 3-6 hours, and slowly cooled to room temperature;

⑤ Pass the calcined activated carbon through a 24-mesh sieve to make loaded activated carbon.

The coagulation-sedimentation tank includes a mixing zone and a sedimentation zone, the bottom of the mixing zone is provided with a coagulation-settling tank inlet pipe, the coagulation-sedimentation tank inlet pipe is connected to the outlet pipe of the catalytic oxidation tank, and the upper part of the mixing zone is provided with a coagulant adding system , a mixing zone agitator is provided in the middle of the mixing zone; a baffle plate is provided in the said settling zone, and the baffle plate and the inner wall of the coagulation sedimentation tank form a waste water flow channel for the waste water to enter the settling zone, and the outlet of the settling zone is provided with Coagulation-sedimentation tank three-phase separator, the upper part of the outlet of the settling area is provided with a coagulation-settling tank overflow weir, the coagulation-settling tank overflow weir is connected to the coagulation-settling tank outlet pipe, the bottom of the settling area is designed as a conical structure, and the bottom of the settling area is designed as a conical structure. A sediment discharge valve is provided.

The adsorption filter tower includes a top cover, an adsorption filter tower water inlet pipe, an adsorption filter tower cloth water pipe, a filter material, a filter material support frame, an air inlet and an adsorption filter tower outlet pipe; The top cover, there is an air outlet between the top cover and the tower body; the inlet pipe of the adsorption filter tower is arranged under the top cover of the filter tower, and one end of the inlet pipe of the adsorption filter tower is connected to the outlet pipe of the coagulation sedimentation tank, and the inlet pipe of the adsorption filter tower The other end is connected to the adsorption filter tower cloth water pipe; the adsorption filter tower cloth water pipe is placed on the upper part of the filter material on the top layer; the filter material is placed on the filter material support frame, and the particle size of the filter material gradually becomes smaller from the upper layer to the lower layer; The material support frame is designed as an inverted trapezoidal drawer. On the one hand, it enhances ventilation and avoids odor. On the other hand, it is convenient to observe and replace the filter material. The material can be pulled out and replaced; the bottom of the adsorption filter tower is provided with an air inlet and an outlet pipe of the adsorption filter tower.

The effluent from the adsorption filter tower enters the clear water pool.

The method for wastewater treatment using the effluent advanced treatment system of the above-mentioned secondary sewage treatment plant has the following steps:

① The effluent of the secondary sewage treatment plant enters the catalytic oxidation tank through the water inlet pipe of the catalytic oxidation tank and the water distribution pipe of the catalytic oxidation tank. , and flow upwards, and at the same time wash the loaded activated carbon, the water flow drives the loaded activated carbon into the surrounding area of the fluidization cylinder, and continuously moves from top to bottom under the action of gravity, the microorganisms on the loaded activated carbon use the pollutants in the sewage to carry out their own At the same time, activated carbon is loaded to adsorb and catalyze the oxidation of pollutants.

② The three-phase separator in the catalytic oxidation tank realizes solid-liquid separation; the solids sink to the lower part of the catalytic oxidation tank under the action of gravity; the waste water enters the water inlet pipe of the coagulation sedimentation tank through the overflow weir of the catalytic oxidation tank and the outlet pipe of the catalytic oxidation tank.

③Wastewater enters the coagulation sedimentation tank through the inlet pipe of the coagulation sedimentation tank, mixes with the coagulant, and stirs with the mixer in the mixing zone; the wastewater after the coagulation reaction enters the sedimentation zone, and the three-phase separator of the coagulation sedimentation tank in the sedimentation zone Realize solid-liquid separation; solids sink to the lower part of the sedimentation area under the action of gravity, and are discharged through the sediment discharge valve at the bottom; waste water enters the inlet pipe of the adsorption filter tower through the overflow weir of the coagulation sedimentation tank and the outlet pipe of the coagulation sedimentation tank .

④Wastewater enters the adsorption filter tower through the inlet pipe of the adsorption filter tower and the cloth water pipe of the adsorption filter tower. The air and wastewater meet in the filter material to undergo biochemical reactions. The outlet pipe, the outlet water from the outlet pipe of the adsorption filter tower enters the clear water pool for use.

⑤ The sediment produced in the coagulation sedimentation tank is concentrated and dehydrated before being transported abroad.

The invention has the beneficial effects of adapting measures to local conditions, less infrastructure investment, convenient maintenance, low energy consumption, and relatively good treatment effect on effluent from secondary sewage plants.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of a catalytic oxidation tank according to an embodiment of the present invention.

In Figure 1: 1. Catalytic oxidation tank, 1-1. Fluidized cylinder, 1-2. Catalytic oxidation tank water inlet pipe, 1-3. Catalytic oxidation tank water distribution pipe, 1-4. Ozone aeration plate, 1-5 .Ozone blower, 1-6. Ozone generator, 1-7. Three-phase separator for catalytic oxidation tank, 1-8. Overflow weir for catalytic oxidation tank, 1-9. Loaded activated carbon.

Fig. 2 is a schematic structural view of a coagulation sedimentation tank according to an embodiment of the present invention.

In Fig. 2: 2. Coagulation sedimentation tank, 2-1. Mixing area, 2-2. Sedimentation area, 2-3. Coagulation sedimentation tank inlet pipe, 2-4. Coagulant addition system, 2-5. Agitator in mixing zone, 2-6. Baffle plate, 2-7. Three-phase separator of coagulation sedimentation tank, 2-8. Overflow weir of coagulation sedimentation tank, 2-9. Sediment discharge valve.

Fig. 3 is a schematic structural view of an adsorption filter tower according to an embodiment of the present invention.

In Fig. 3: 3. adsorption filter tower, 3-1. top cover, 3-2. adsorption filter tower water inlet pipe, 3-3. adsorption filter tower cloth water pipe, 3-4. filter material, 3-5. filter material Support frame, 3-6. air inlet, 3-7. adsorption filter tower outlet pipe.

Fig. 4 is a process flow diagram of an embodiment of the present invention.

detailed description

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example

As shown in Figures 1 to 4, a secondary sewage treatment plant effluent advanced treatment system of the present invention includes a catalytic oxidation tank 1, a coagulation sedimentation tank 2, an adsorption filter tower 3 and a clear water tank, a catalytic oxidation tank 1, a mixing tank The condensation sedimentation tank 2, the adsorption filter tower 3 and the clear water tank are connected in sequence.

The catalytic oxidation tank 1 is provided with a fluidization cylinder 1-1, the upper part of the fluidization cylinder is cylindrical, the lower part of the fluidization cylinder is trumpet-shaped, the fluidization cylinder is located in the center of the catalytic oxidation tank, and the lower end of the fluidization cylinder is The trumpet-shaped opening is located at the bottom of the catalytic oxidation tank, and the upper opening is located at the middle of the catalytic oxidation tank. The lower part of the fluidization cylinder is provided with a catalytic oxidation tank water inlet pipe 1-2 and a catalytic oxidation tank water distribution pipe 1-3. The catalytic oxidation tank The water distribution pipes 1-3 are arranged in the shape of concentric circles; the lower part of the water distribution pipes of the catalytic oxidation tank is provided with an ozone aeration plate 1-4, and the ozone aeration plate 1-4 is connected to the ozone blower 1-5, and the ozone blower 1-5 is connected through a pipeline Ozone generators 1-6.

The upper part of the catalytic oxidation tank is provided with a three-phase separator 1-7 of the catalytic oxidation tank, and the three-phase separator 1-7 of the catalytic oxidation tank includes a deflector and a triangular guide located below the deflector and used in conjunction with the deflector. flow ring, the triangular flow guide ring is installed on the inner wall of the catalytic oxidation tank, the upper part of the flow guide plate is cylindrical, the lower part of the flow guide plate is trumpet-shaped, and the The inner diameter of the lower part is larger than the inner diameter of the triangular guide ring; the outer side of the guide plate is provided with a catalytic oxidation tank overflow weir 1-8, and the catalytic oxidation tank overflow weir 1-8 is connected to the outlet pipe of the catalytic oxidation tank; the catalytic oxidation tank is filled with loaded activated carbon 1- 9.

Specifically, the catalytic oxidation tank 1 has a cylindrical structure, and an observation port and a maintenance and replacement port are provided on the cylindrical structure. The volume of the catalytic oxidation tank is determined according to the amount of water to be treated. place.

The preparation method of described supported activated carbon is;

① Pass the activated carbon through a 24-mesh sieve and dry it at 105°C;

②Immerse the dried activated carbon in manganese nitrate solution with a mass concentration of 5% for 10 hours;

③ Dry the soaked activated carbon at 105°C;

④The activated carbon dried in step ③ was raised to 450°C at 10°C/min, calcined for 4 hours, and slowly cooled to room temperature;

⑤ Pass the calcined activated carbon through a 24-mesh sieve to make loaded activated carbon.

The coagulation-sedimentation tank 2 includes a mixing zone 2-1 and a settling zone 2-2, the bottom of the mixing zone is provided with a coagulation-settling tank inlet pipe 2-3, and the middle and upper part is provided with a coagulant addition system 2-4. The middle part of the mixing zone is provided with a mixing zone agitator 2-5; the settling zone is provided with a baffle plate 2-6, and the baffle plate and the inner wall of the coagulation-sedimentation tank 2 form a waste water flow path for the waste water to enter the settling zone, and the settling zone The outlet of the coagulation sedimentation tank is provided with a three-phase separator 2-7, and the upper part of the outlet of the sedimentation area is provided with a coagulation sedimentation tank overflow weir 2-8, and the coagulation sedimentation tank overflow weir 2-8 is connected to the coagulation sedimentation tank outlet pipe , The bottom of the sedimentation area is designed as a conical structure, and a sediment discharge valve 2-9 is arranged at the bottom of the sedimentation area.

The adsorption filter tower 3 includes a top cover 3-1, an adsorption filter tower water inlet pipe 3-2, an adsorption filter tower cloth water pipe 3-3, a filter material 3-4, a filter material support frame 3-5, an air inlet 3-6 and an adsorption filter tower. The filter tower outlet pipe 3-7; the adsorption filter tower 3 adopts multi-layer settings, the top is provided with a top cover 3-1, and an air outlet is left between the top cover 3-1 and the tower body; the top cover of the filter tower 3-1 Adsorption filter tower water inlet pipe 3-2 is arranged below, and adsorption filter tower water inlet pipe 3-2 connects adsorption filter tower cloth water pipe 3-3; The material 3-4 is placed on the filter material support frame 3-5, and the particle size of the filter material gradually becomes smaller from the upper layer to the lower layer; the filter material support frame is designed as an inverted trapezoidal drawer type, on the one hand, it strengthens ventilation to avoid odor, and on the other hand On the one hand, it is convenient to observe and replace the filter material. When the filter material of this layer is seriously blocked and the filtration rate is very low, it is only necessary to pull out the filter material of this layer for replacement; the bottom of the adsorption filter tower is provided with air inlets 3-6 and adsorption filter Tower outlet pipe 3-7.

The outlet water from the outlet pipe of the adsorption filter tower enters the clear water pool for utilization.

The method for wastewater treatment using the effluent advanced treatment system of the above-mentioned secondary sewage treatment plant has the following steps:

The effluent from the adsorption filter tower enters the clear water pool.

The method for wastewater treatment using the effluent advanced treatment system of the above-mentioned secondary sewage treatment plant has the following steps:

① The effluent of the secondary sewage treatment plant enters the catalytic oxidation tank through the water inlet pipe 1-2 of the catalytic oxidation tank and the water distribution pipe 1-3 of the catalytic oxidation tank. The water flow and air flow inside drive the loaded activated carbon 1-9 to produce fluidization, and flow upwards, and at the same time wash the loaded activated carbon, and the water flow drives the loaded activated carbon into the surrounding area of the fluidization cylinder, and continuously from top to bottom under the action of gravity Mobile, the microorganisms on the loaded activated carbon 1-9 use the pollutants in the sewage to reproduce themselves, and the loaded activated carbon adsorbs and catalyzes the oxidation of the pollutants.

②The three-phase separator 1-7 of the catalytic oxidation tank realizes solid-liquid separation; the solid matter sinks to the lower part of the catalytic oxidation tank under the action of gravity; the waste water enters the mixing tank through the overflow weir 1-8 of the catalytic oxidation tank and the outlet pipe of the catalytic oxidation tank Condensation sedimentation tank inlet pipe 2-3.

③Wastewater enters the coagulation sedimentation tank 2 through the coagulation sedimentation tank inlet pipe 2-3, mixes with the coagulant, and is stirred by the mixer 2-5 in the mixing zone; the wastewater after the coagulation reaction enters the sedimentation zone 2-2, and the sedimentation The three-phase separator in the coagulation-sedimentation tank realizes solid-liquid separation; the solids sink to the lower part of the sedimentation zone under the action of gravity, and are discharged through the sediment discharge valve 2-9 at the bottom; the waste water passes through the overflow weir of the coagulation-sedimentation tank 2-8 and the coagulation sedimentation tank outlet pipe enter the adsorption filter tower inlet pipe 3-2.

④Wastewater enters the adsorption filter tower through the inlet pipe 3-2 of the adsorption filter tower and the cloth water pipe 3-3 of the adsorption filter tower, and the air and wastewater meet in the filter material 3-4 to undergo biochemical reactions. The water treated by the tower enters the outlet pipe 3-7 of the adsorption filter tower, and the outlet water from the outlet pipe of the adsorption filter tower enters the clear water pool for utilization.

⑤ The sediment produced in the coagulation sedimentation tank is concentrated and dehydrated before being transported abroad.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (2)

1. A secondary sewage treatment plant effluent advanced treatment system, characterized in that it includes a catalytic oxidation tank (1), a coagulation sedimentation tank (2), an adsorption filter tower (3) and a clear water tank, and a catalytic oxidation tank (1) , the coagulation sedimentation tank (2), the adsorption filter tower (3) and the clear water tank are connected in sequence; The catalytic oxidation tank (1) is provided with a fluidization cylinder (1-1). The upper part of the fluidization cylinder is cylindrical, and the lower part of the fluidization cylinder is trumpet-shaped. The fluidization cylinder is located in the center of the catalytic oxidation tank. The trumpet-shaped opening at the lower end of the fluidization cylinder is located in the lower part of the catalytic oxidation tank, and the upper opening is located in the middle of the catalytic oxidation tank. The lower part of the fluidization cylinder is provided with a catalytic oxidation tank water inlet pipe (1-2) and a catalytic oxidation tank water distribution pipe (1-3 ), the water distribution pipe (1-3) of the catalytic oxidation tank is set to a concentric circle shape; the bottom of the water distribution pipe of the catalytic oxidation tank is provided with an ozone aeration disc (1-4), and the ozone aeration disc (1-4) is connected The ozone blower (1-5), the ozone blower (1-5) communicates with the ozone generator (1-6) through the pipeline; The upper part of the catalytic oxidation tank is provided with a catalytic oxidation tank three-phase separator (1-7), and the catalytic oxidation tank three-phase separator (1-7) includes a guide plate and is located below the guide plate to cooperate with the guide plate The triangular deflector ring used, the triangular deflector ring is installed on the inner wall of the catalytic oxidation tank, the upper part of the deflector is cylindrical, the lower part of the deflector is trumpet-shaped, and the The inner diameter of the lower part of the guide plate is greater than the inner diameter of the triangular guide ring; the outer side of the guide plate is provided with a catalytic oxidation tank overflow weir (1-8), and the catalytic oxidation tank overflow weir (1-8) is connected to the outlet pipe of the catalytic oxidation tank; The catalytic oxidation tank is filled with loaded activated carbon (1-9); Specifically, the catalytic oxidation tank (1) is a cylindrical structure, and the cylindrical structure is provided with an observation port and an inspection and replacement port. The volume of the catalytic oxidation tank is determined according to the amount of water to be treated, and a vertical placed vertically; The preparation method of described supported activated carbon is; ① Pass the activated carbon through a 24-mesh sieve and dry it at 105°C; ② Immerse the dried activated carbon in manganese nitrate solution with a mass concentration of 3-8% for 8-12 hours; ③ Dry the soaked activated carbon at 105°C; ④The activated carbon dried in step ③ is raised to 400-600°C at 10°C/min, calcined for 3-6 hours, and slowly cooled to room temperature; ⑤ Pass the calcined activated carbon through a 24-mesh sieve to make loaded activated carbon; The coagulation-settling tank (2) comprises a mixing zone (2-1) and a settling zone (2-2), the bottom of the mixing zone is provided with a coagulation-settling tank inlet pipe (2-3), and the coagulation-settling tank inlet pipe Connect the outlet pipe of the catalytic oxidation tank, the upper part of the mixing zone is provided with a coagulant addition system (2-4), and the middle part of the mixing zone is provided with a mixing zone agitator (2-5); the settling zone is provided with a baffle ( 2-6), the baffle plate and the inner wall of the coagulation-settling tank (2) form a waste water flow channel as the waste water enters the sedimentation area, and the outlet of the sedimentation area is provided with a coagulation-settling tank three-phase separator (2-7), The upper part of the outlet of the sedimentation area is provided with a coagulation sedimentation tank overflow weir (2-8). The coagulation sedimentation tank overflow weir (2-8) is connected to the outlet pipe of the coagulation sedimentation tank. A sediment discharge valve (2-9) is provided at the bottom; The adsorption filter tower (3) comprises a top cover (3-1), an adsorption filter tower water inlet pipe (3-2), an adsorption filter tower cloth water pipe (3-3), a filter material (3-4), a filter material support frame ( 3-5), the air inlet (3-6) and the adsorption filter tower outlet pipe (3-7); the adsorption filter tower (3) adopts multi-layer settings, the top is provided with a top cover (3-1), and the top cover ( There is an air outlet between 3-1) and the tower body; an adsorption filter tower inlet pipe (3-2) is provided under the top cover (3-1) of the filter tower, and one end of the adsorption filter tower inlet pipe is connected to the coagulation sedimentation tank Outlet pipe, the other end of the inlet pipe of the adsorption filter tower is connected to the adsorption filter cloth water pipe (3-3); the adsorption filter cloth water pipe (3-3) is placed on the uppermost layer of filter material; ) is placed on the filter material support frame (3-5), the particle size of the filter material from the upper layer to the lower layer becomes smaller gradually; On the one hand, it is convenient to observe and replace the filter material. When the filter material of this layer is seriously blocked and the filtration rate is very low, it is only necessary to pull out the filter material of this layer for replacement; the bottom of the adsorption filter tower is provided with air inlets (3-6) and adsorption Filter tower outlet pipe (3-7); The effluent from the adsorption filter tower enters the clear water pool. 2. The method for wastewater treatment by adopting the effluent advanced treatment system of the secondary sewage treatment plant as claimed in claim 1, is characterized in that: it has the following steps; ① The effluent of the secondary sewage treatment plant enters the catalytic oxidation tank through the water inlet pipe (1-2) of the catalytic oxidation tank and the water distribution pipe (1-3) of the catalytic oxidation tank, and the water distribution pipe (1-3) of the catalytic oxidation tank realizes uniform water distribution. The water flow and airflow in the fluidization cylinder (1-1) drive the loaded activated carbon (1-9) to produce fluidization, and flow upwards, and at the same time wash the loaded activated carbon, and the water flow drives the loaded activated carbon into the surrounding area of the fluidization cylinder, and Under the action of gravity, it continuously moves from top to bottom, and the microorganisms on the loaded activated carbon (1-9) use the pollutants in the sewage to reproduce themselves, and at the same time, the loaded activated carbon absorbs and catalyzes the oxidation of pollutants; ② The three-phase separator (1-7) of the catalytic oxidation tank realizes solid-liquid separation; the solid matter sinks to the lower part of the catalytic oxidation tank under the action of gravity; the waste water passes through the overflow weir (1-8) of the catalytic oxidation tank and the catalytic oxidation tank The outlet pipe enters the water inlet pipe (2-3) of the coagulation sedimentation tank; ③Wastewater enters the coagulation sedimentation tank (2) through the coagulation sedimentation tank inlet pipe (2-3), mixes with the coagulant, and stirs with the mixer in the mixing zone (2-5); the wastewater after the coagulation reaction enters the sedimentation tank Area (2-2), the three-phase separator of the coagulation sedimentation tank in the sedimentation area realizes solid-liquid separation; the solids sink to the lower part of the sedimentation area under the action of gravity, and pass through the sediment discharge valve (2-9) at the bottom Discharge; waste water enters the adsorption filter tower inlet pipe (3-2) through the coagulation sedimentation tank overflow weir (2-8) and the coagulation sedimentation tank outlet pipe; ④Wastewater enters the adsorption filter tower through the inlet pipe (3-2) of the adsorption filter tower and the cloth water pipe (3-3) of the adsorption filter tower. The wastewater is filtered, the water treated by the adsorption filter tower enters the outlet pipe (3-7) of the adsorption filter tower, and the outlet water from the outlet pipe of the adsorption filter tower enters the clear water pool for use; ⑤ The sediment produced in the coagulation sedimentation tank is concentrated and dehydrated before being transported abroad.