Spiral-flow type Fenton reaction tower for advanced sewage treatment

Abstract

The utility model discloses a spiral-flow type Fenton reaction tower for advanced sewage treatment, which comprises a reaction tower, the reaction tower comprises a reaction tower body, a water inlet main pipe, a separator, an overflow weir, a guide plate, an aeration main pipe, a return pipe, a spiral-flow main pipe and a reaction tower water outlet pipe, and the guide plate is arranged in the center of the bottom of the reaction tower body. An outlet of the water inlet main pipe is arranged above the flow guide plate, the aeration main pipe surrounds the outer part of the flow guide plate, a plurality of jet orifices are formed in the inner wall of the reaction tower body at the same height, and a jet branch pipe is arranged on each jet orifice; according to the utility model, a powder catalyst and an iron salt are used as Fenton catalysts, and are stirred and mixed through gas-water rotational flow, so that the stirring and mixing effect can be enhanced, the solid-liquid contact area can be increased, and the Fenton catalytic oxidation reaction rate can be increased; according to the device, the catalyst is intercepted by the separator, so that the catalyst can be repeatedly utilized, the sludge yield is effectively reduced, and the effects of reducing the sludge and ensuring the reaction efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a swirl Fenton reaction tower for advanced sewage treatment, which is suitable for the efficient removal of pollutants. Background Art

[0002] Although the traditional biological method has low treatment cost, it can only treat easily biodegradable wastewater. After being treated by the biological method, the effluent cannot meet the discharge requirements. With the increasingly strict environmental protection requirements, more and more sewage treatment systems are facing the transformation of advanced sewage treatment.

[0003] As an efficient advanced oxidation technology for wastewater, the Fenton method is increasingly used in the treatment of refractory organic matters. However, the traditional Fenton system has problems such as low utilization rate of hydrogen peroxide, low reaction efficiency, and large amount of iron sludge production. In the existing Fenton reactor, the medicament and sewage are not mixed evenly enough, resulting in poor treatment effect.

[0004] The Fenton system mainly uses Fe 2+ and hydrogen peroxide to react to generate hydroxyl radicals, which have strong oxidation ability in acidic aqueous solution and can degrade organic pollutants in wastewater well, and the reaction rate is relatively fast. However, the Fenton method has many deficiencies in practical applications: (1) The cost of hydrogen peroxide is relatively high, and there are problems in storage and transportation. Due to the continuous consumption of hydrogen peroxide, hydrogen peroxide needs to be continuously added to make the reaction continue; (2) The treated water body contains more iron ions, causing secondary pollution and forming iron-containing sludge that is difficult to treat and regenerate; (3) The utilization rate of the catalyst is low and the oxidation efficiency is low.

[0005] In order to solve the iron sludge problem, heterogeneous Fenton reaction has been gradually developed at present. In this reaction system, iron-containing solid substances or carrier ionic iron are usually put into the reaction system to obtain solid-liquid separation ability and avoid secondary pollution. The heterogeneous Fenton reaction system has advantages such as a wide effective pH range and the catalyst can be reused. However, there are still mass transfer problems in its reaction process, and the reaction rate is much lower than that of the traditional Fenton reaction, and other means need to be added to strengthen the process of heterogeneous Fenton reaction. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a swirl Fenton reaction tower for advanced sewage treatment in view of the above problems existing in the prior art.

[0007] The above purpose of the utility model is achieved by the following technical means:

[0008] A cyclone Fenton reaction tower for advanced wastewater treatment, comprising a reaction tower which includes a reaction tower body, a main inlet pipe, a separator, an overflow weir, a guide plate, a main aeration pipe, a reflux pipe, a main swirl pipe, and a reaction tower outlet pipe. The guide plate, separator, overflow weir, and main aeration pipe are all arranged inside the reaction tower body. The conical guide plate is arranged at the center of the bottom of the reaction tower body. The outlet of the main inlet pipe is arranged above the guide plate. The annular main aeration pipe surrounds the outside of the guide plate, and the main aeration pipe and the guide plate share the same central axis. The annular main swirl pipe surrounds the outside of the reaction tower body, and a circulation pump is arranged on the main swirl pipe. The inlet end of the reflux pipe is arranged below the separator, and the outlet end of the reflux pipe is connected to the main swirl pipe. A plurality of jet ports are opened at the same height on the inner wall of the reaction tower body, and a jet branch pipe is arranged on each jet port. All the jet branch pipes are communicated with the main swirl pipe. The separator and the overflow weir are both arranged at the upper part of the reaction tower body, and both the separator and the overflow weir are fixedly connected to the inner wall of the reaction tower body. The separator is arranged above the guide plate, and the overflow weir is arranged above the separator. One end of the reaction tower outlet pipe is connected to the water outlet of the overflow weir, and the other end of the reaction tower outlet pipe extends outside the reaction tower body. A sludge discharge pipe is arranged on the side wall of the bottom of the reaction tower body.

[0009] The reaction tower as described above further includes a screw air compressor, an air storage tank, and a plurality of aeration branch pipes. A plurality of aeration ports are evenly opened on the main aeration pipe, and an aeration branch pipe is arranged on each aeration port. Each aeration branch pipe is arranged at the same angle deviating from the connection line between the corresponding aeration port and the center of the main aeration pipe. The main aeration pipe is also connected to one end of an external connection pipe, and the other end of the external connection pipe is connected to the air outlet of the air storage tank. The screw air compressor is connected to the air inlet of the air storage tank; each jet branch pipe is arranged at the same angle deviating from the connection line between the corresponding jet port and the central axis of the reaction tower body. The gas swirl direction formed by all the aeration branch pipes is the same as the liquid swirl direction formed by all the jet branch pipes.

[0010] The overflow weir as described above includes two cross-shaped collecting troughs and a triangular weir. Both ends of each collecting trough are fixedly connected to the inner wall of the reaction tower body, and a triangular weir is arranged on each collecting trough. The water outlet of the overflow weir is arranged at the intersection of the two collecting troughs.

[0011] The separator as described above includes multiple layers of separation pipe rows. Each layer of separation pipe row includes a plurality of separation pipes arranged in parallel. Both ends of the separation pipes are fixedly connected to the inner wall of the reaction tower body. The cross-sectional shape of the separation pipes in the bottommost layer of the separation pipe row is triangular, and the cross-sectional shapes of the separation pipes in the other layers except the bottommost layer are all rhombic. Each layer of separation pipe row is arranged in a staggered manner with the adjacent two layers of separation pipe rows.

[0012] As described above, the water inlet main pipe includes a water inlet pipe, a first chemical addition pipe, and a cyclone generator. An inlet water flowmeter and a first pipe mixer are also provided on the water inlet pipe. The first chemical addition pipe is communicated with the water inlet pipe through the first pipe mixer. One end of the water inlet pipe is a water inlet, and the water inlet is located outside the reaction tower body. The other end of the water inlet pipe penetrates into the reaction tower body and extends above the baffle plate. The port at the other end of the water inlet pipe is a flared water outlet of the water inlet pipe. A cyclone generator is provided in the pipe body above the water outlet of the water inlet pipe. A second pipe mixer is also provided on the reflux pipe. One end of the second chemical addition pipe is a second chemical addition port, and the other end of the second chemical addition pipe is connected to the reflux pipe through the second pipe mixer. A reflux pipe flowmeter is also provided on the reflux pipe, and a sludge discharge pump is provided on the sludge discharge pipe.

[0013] As described above, the cyclone generator includes a hollow cylinder and a plurality of cyclone plates. The plurality of cyclone plates are uniformly arranged along the outer circumference of the hollow cylinder. The two side edges of the cyclone plate are respectively obliquely fixed on the outer wall of the hollow cylinder and the inner wall of the water inlet pipe. The swirling direction generated by the cyclone generator is the same as the liquid swirling direction formed by all the jet branch pipes.

[0014] As described above, the reaction tower further includes a fence and a plurality of lightning rods. The fence and the plurality of lightning rods are both arranged on the top of the reaction tower body; An on-line pH meter and an OPR instrument are arranged on the top of the reaction tower, and a staircase is also arranged beside the reaction tower. The top of the staircase is communicated with the top of the reaction tower.

[0015] The utility model has the following beneficial effects compared with the prior art:

[0016] (1) The utility model uses a powder catalyst and iron salt as the Fenton catalyst, and performs stirring and mixing through gas-water swirl, which can strengthen the stirring and mixing effect, increase the solid-liquid contact area, improve the rate of the Fenton catalytic oxidation reaction, improve the mass transfer efficiency between the catalyst and the pollutants, achieve the efficient removal of pollutants, and reduce the floor area of the equipment.

[0017] (2) The device uses a separator to intercept the catalyst, enabling the catalyst to be reused repeatedly, effectively reducing the sludge production, and achieving the effect of both reducing sludge and ensuring the reaction efficiency. Description of the Drawings

[0018] Figure 1 is the side view of Embodiment 2 of the utility model;

[0019] Figure 2 is the front view of Embodiment 2 of the utility model;

[0020] Figure 3 is the structural schematic diagram of the utility model;

[0021] Figure 4 is the structural schematic diagram of the overflow weir of the utility model;

[0022] Figure 5 It is a schematic structural diagram of the main aeration pipe, aeration branch pipe, and jet branch pipe of the present utility model;

[0023] Figure 6 It is a schematic structural diagram of the swirl generator of the present utility model;

[0024] Reference numerals and corresponding component names:

[0025] 1 - primary reaction tower; 2 - secondary reaction tower; 3 - staircase; 4 - gas storage tank; 5 - sludge discharge pump; 6 - screw air compressor; 7 - circulation pump; 8 - main inlet pipe; 9 - inlet flowmeter; 10 - first pipe mixer; 11 - swirl main pipe; 12 - jet branch pipe; 13 - reaction tower outlet pipe; 15 - external connection pipe; 16 - first chemical addition pipe; 17 - swirl generator; 18 - guide plate; 19 - main aeration pipe; 20 - sludge discharge pipe; 21 - second chemical addition pipe; 22 - reflux pipe; 23 - reflux pipe flowmeter; 24 - separator; 25 - overflow weir; 26 - fence; 27 - lightning rod. Detailed implementation manners

[0026] To facilitate the understanding and implementation of the present utility model by those of ordinary skill in the art, the present utility model will be further described in detail below in conjunction with embodiments. The embodiments described herein are only used to illustrate and explain the present utility model and are not intended to limit the present utility model.

[0027] Embodiment 1:

[0028] A swirl Fenton reaction tower for advanced wastewater treatment, comprising a reaction tower. The reaction tower includes a reaction tower body, a main inlet pipe 8, a separator 24, an overflow weir 25, a guide vane 18, a main aeration pipe 19, a reflux pipe 22, a main swirl pipe 11, and a reaction tower outlet pipe 13. The guide vane 18, the separator 24, the overflow weir 25, and the main aeration pipe 19 are all arranged inside the reaction tower body. The conical guide vane 18 is arranged at the center of the bottom of the reaction tower body. The outlet of the main inlet pipe 8 is arranged above the guide vane 18. The annular main aeration pipe 19 surrounds the outside of the guide vane 18. The main aeration pipe 19 and the guide vane 18 share the same central axis. The annular main swirl pipe 11 surrounds the outside of the reaction tower body. A circulation pump 7 is arranged on the main swirl pipe 11. The inlet end of the reflux pipe 22 is arranged below the separator 24. The outlet end of the reflux pipe 22 is connected to the main swirl pipe 11. A plurality of jet ports are opened at the same height on the inner wall of the reaction tower body. A jet branch pipe 12 is arranged at each jet port. All the jet branch pipes 12 are communicated with the main swirl pipe 11. The separator 24 and the overflow weir 25 are both arranged at the upper part of the reaction tower body. The separator 24 and the overflow weir 25 are both fixedly connected to the inner wall of the reaction tower body. The separator 24 is arranged above the guide vane 18. The overflow weir 25 is arranged above the separator 24. One end of the reaction tower outlet pipe 13 is connected to the water outlet of the overflow weir 25. The other end of the reaction tower outlet pipe 13 extends out of the reaction tower body. A sludge discharge pipe 20 is arranged on the side wall of the bottom of the reaction tower body.

[0029] The reaction tower further includes a screw air compressor 6, an air storage tank 4, and a plurality of aeration branch pipes. A plurality of aeration ports are evenly opened on the main aeration pipe 19. An aeration branch pipe is arranged at each aeration port. Each aeration branch pipe is arranged at the same angle deviating from the connection line between the corresponding aeration port and the center of the main aeration pipe 19. The main aeration pipe 19 is also connected to one end of an external connection pipe 15. The other end of the external connection pipe 15 is connected to the air outlet of the air storage tank 4. The screw air compressor 6 is connected to the air inlet of the air storage tank 4. Each jet branch pipe 12 is arranged at the same angle deviating from the connection line between the corresponding jet port and the central axis of the reaction tower body; the gas swirl direction formed by all the aeration branch pipes is the same as the liquid swirl direction formed by all the jet branch pipes 12, so that a gas-liquid swirl can be formed.

[0030] The overflow weir 25 includes two cross-shaped collecting troughs and triangular weirs. Both ends of each collecting trough are fixedly connected to the inner wall of the reaction tower body. A serrated triangular weir is arranged on each collecting trough. The water outlet of the overflow weir 25 is arranged at the intersection of the two collecting troughs;

[0031] The separator 24 includes multiple layers of separation tube rows. Each layer of separation tube row includes multiple separation tubes arranged in parallel. The two ends of the separation tubes are fixedly connected to the inner wall of the reaction tower body. The cross-sectional shape of the separation tubes in the bottommost layer of the separation tube row is triangular, and the cross-sectional shapes of the separation tubes in the other layers except the bottommost layer are all rhombic. Each layer of separation tube row is arranged offset from the adjacent two layers of separation tube rows.

[0032] The main inlet pipe 8 includes an inlet pipe, a first chemical addition pipe 16, and a swirl generator 17. An inlet flow meter 9 and a first pipeline mixer 10 are provided on the inlet pipe. The first chemical addition pipe 16 is communicated with the inlet pipe through the first pipeline mixer 10. One end of the inlet pipe is the water inlet, and the water inlet is located outside the reaction tower body. The other end of the inlet pipe penetrates into the reaction tower body and extends above the baffle plate 18. The port at the other end of the inlet pipe is a flared water outlet of the inlet pipe. A swirl generator 17 is provided in the pipe body above the water outlet of the inlet pipe. The water outlet of the inlet pipe is the outlet of the main inlet pipe 8. A water pump can also be provided on the inlet pipe. A second pipeline mixer is also provided on the return pipe 22. One end of the second chemical addition pipe 21 is the second chemical addition port, and the other end of the second chemical addition pipe 21 is connected to the return pipe 22 through the second pipeline mixer. A return flow meter 23 is also provided on the return pipe 22. A sludge discharge pump 55 is provided on the sludge discharge pipe 20.

[0033] The swirl generator 17 includes a hollow cylinder and multiple swirl plates. The multiple swirl plates are uniformly arranged along the outer circumference of the hollow cylinder. The two sides of the swirl plate are respectively obliquely fixed (at a certain angle deviating from the vertical direction) on the outer wall of the hollow cylinder and the inner wall of the inlet pipe. The swirl direction generated by the swirl generator 17 is the same as the liquid swirl direction formed by all the jet branch pipes 12.

[0034] The reaction tower also includes a fence 26 and multiple lightning rods 27. The fence 26 and the multiple lightning rods 27 are both arranged on the top of the reaction tower body; An on-line pH meter (acidimeter) and an OPR meter (oxidation-reduction potentiometer) are installed on the top of the reaction tower to detect the pH value and oxidation-reduction potential during operation. A staircase 3 is also provided beside the reaction tower, and the top of the staircase 3 is communicated with the top of the reaction tower.

[0035] As an implementable mode, the height of the cone top of the baffle plate 18 can be set to 1 / 4 - 1 / 3 of the cone bottom diameter, and the bottom diameter of the baffle plate 18 can be set to 50% - 60% of the reaction tower diameter;

[0036] The acute angle of the separation tube can be set to 60 - 70°, the width of the flow-through channel (i.e., the gap between the separation tubes) of the separator 24 can be set to 30 - 50 mm, and the separator 24 is made of PE material;

[0037] The diameter of the hollow cylinder is 1 / 3 to 1 / 2 of the diameter of the water inlet pipe. The number of the swirl plates is 6 to 8. The inlet end of the return pipe 22 is 30 to 50 cm lower than the bottom of the separator 24. The top of the separator 24 is 0.5 to 1.0 m lower than the bottom of the overflow weir 25. The flow rate of the circulation pump 7 is 50 to 100% of the flow rate of the main water inlet pipe 8.

[0038] The number of the jet branch pipes 12 and the aeration branch pipes can be set to 8. The outlets of the jet branch pipes 12 and the aeration branch pipes are parallel to the horizontal direction. The outlet height of the jet branch pipe 12 is 10 cm. The outlet height of the aeration branch pipe is 10 cm higher than the bottom of the flow guide plate 18 of the reaction tower. The jet branch pipe 12 deviates from the connection line between the corresponding jet orifice and the central axis of the reaction tower body by 60° to 75°. The aeration branch pipe deviates from the connection line between the corresponding aeration orifice and the center of the main aeration pipe 19 by 30°.

[0039] The specific working process of the present utility model is as follows: Sewage enters the pipeline mixer from the water inlet pipe. The powdered catalyst, iron salt, and acid solution enter the pipeline mixer from the first chemical dosing pipe 16. The powdered catalyst, iron salt, acid solution, and sewage are mixed in the pipeline mixer, and then further mixed in the swirl generator 17. The mixed solid-liquid mixture moves upward under the action of the flow guide plate 18. The pH of the solution in the reaction tower is controlled to be 2 to 4. At the same time, the hydrogen peroxide required for the Fenton reaction enters the return pipe 22 from the second chemical dosing pipe 21 and enters the reaction tower from the return pipe 22. At the bottom of the reaction tower, the solid-liquid mixture and hydrogen peroxide are further mixed under the gas-liquid swirl action of the aeration branch pipe and the jet branch pipe 12, and the Fenton catalytic oxidation reaction occurs. The powdered catalyst is fully stirred. As the treated sewage moves upward, when passing through the separator 24, the powdered catalyst is intercepted, and the sewage continues to move upward and flows out of the reaction tower through the outlet pipe 13 after passing through the overflow weir 25. When sludge discharge is required, the circulation pump 7 and the screw air compressor 6 are turned off, and the precipitated sludge (containing the catalyst) is discharged from the sludge discharge pipe 20.

[0040] The present utility model uses a powdered catalyst and iron salt as the Fenton catalyst, and performs stirring and mixing through gas-liquid swirl, which can strengthen the stirring and mixing effect, increase the solid-liquid contact area, improve the rate of the Fenton catalytic oxidation reaction, improve the mass transfer efficiency between the catalyst and the pollutants, achieve efficient removal of pollutants, and reduce the floor area of the equipment.

[0041] This device uses the separator 24 to intercept the catalyst, enabling the catalyst to be reused repeatedly, effectively reducing the sludge production, and achieving the effect of both reducing sludge and ensuring the reaction efficiency.

[0042] Example 2:

[0043] A cyclone Fenton reaction tower for advanced wastewater treatment, comprising two pairs of reaction towers. Each pair of reaction towers includes a primary reaction tower 1 and a secondary reaction tower 2. The difference between the secondary reaction tower 2 and the primary reaction tower 1 is that: the height-diameter ratio of the primary reaction tower 1 is 2.5 - 3, the height-diameter ratio of the secondary reaction tower 2 is 2 - 2.5, and the primary reaction tower 1 is 1.5 - 2.0 m higher than the secondary reaction tower 2.

[0044] The total hydraulic retention time of the primary reaction tower 1 and the secondary reaction tower 2 can be set to 1 - 2 hours; the aeration volume control range of the primary reaction tower 1 and the secondary reaction tower 2 can be set to 3 - 7 m 3 / (m 2 ·h), the intake pressure is 0.4 - 0.7 Mpa, and the outlet gas flow rate of the aeration branch pipe is greater than 2 m / s.

[0045] It should be noted that the embodiments described in the present invention are only examples to illustrate the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A cyclone-type Fenton reaction tower for deep sewage treatment, comprising a reaction tower, characterized in that: The reaction tower comprises a reaction tower body, a water inlet main pipe (8), a separator (24), an overflow weir (25), a guide plate (18), an aeration main pipe (19), a reflux pipe (22), a cyclone main pipe (11), and a reaction tower outlet pipe (13). The guide plate (18), the separator (24), the overflow weir (25), and the aeration main pipe (19) are all arranged inside the reaction tower body. The conical guide plate (18) is arranged at the bottom center of the reaction tower body. The outlet of the water inlet main pipe (8) is arranged above the guide plate (18). The annular aeration main pipe (19) surrounds the outside of the guide plate (18). The aeration main pipe (19) and the guide plate (18) share a central axis. The annular cyclone main pipe (11) surrounds the outside of the reaction tower body. A circulating pump (7) is arranged on the cyclone main pipe (11). The inlet end of the reflux pipe (22) is provided with a cyclone main pipe (11). The separator (24) is arranged below the separator (24), the outlet end of the reflux pipe (22) is connected to the cyclone main pipe (11), a plurality of jet ports are provided at the same height on the inner wall of the reaction tower body, each jet port is provided with a jet branch pipe (12), all the jet branch pipes (12) are connected to the cyclone main pipe (11), the separator (24) and the overflow weir (25) are arranged at the upper part of the reaction tower body, the separator (24) and the overflow weir (25) are fixedly connected to the inner wall of the reaction tower body, the separator (24) is arranged above the guide plate (18), the overflow weir (25) is arranged above the separator (24), one end of the reaction tower water outlet pipe (13) is connected to the water outlet of the overflow weir (25), the other end of the reaction tower water outlet pipe (13) extends out of the reaction tower body, and a mud discharge pipe (20) is arranged on the side wall of the bottom of the reaction tower body.

2. A cyclone-type Fenton reaction tower for deep sewage treatment according to claim 1, characterized in that: The reaction tower further comprises a screw air compressor (6), an air storage tank (4), and a plurality of aeration branches. A plurality of aeration ports are evenly arranged on the aeration main pipe (19), and an aeration branch is arranged on each aeration port. Each aeration branch is arranged at the same angle as the line connecting the corresponding aeration port and the center of the aeration main pipe (19). The aeration main pipe (19) is also connected to one end of an external connecting pipe (15), the other end of the external connecting pipe (15) is connected to the air outlet of the air storage tank (4), and the screw air compressor (6) is connected to the air inlet of the air storage tank (4); each jet branch (12) is arranged at the same angle as the line connecting the corresponding jet port and the central axis of the reaction tower body, and the gas swirl direction formed by all the aeration branch pipes is the same as the liquid swirl direction formed by all the jet branch pipes (12).

3. A cyclone-type Fenton reaction tower for deep sewage treatment according to claim 1, characterized in that: The overflow weir (25) comprises two cross-shaped water collecting troughs and a triangular weir, both ends of each water collecting trough are fixedly connected to the inner wall of the reaction tower body, each water collecting trough is provided with a triangular weir, and the water outlet of the overflow weir (25) is provided at the intersection of the two water collecting troughs.

4. A cyclone-type Fenton reaction tower for deep sewage treatment according to claim 1, characterized in that: The separator (24) comprises a plurality of separation tube rows, each of which comprises a plurality of separation tubes arranged in parallel, both ends of the separation tubes being fixedly connected to the inner wall of the reaction tower body, the cross-sectional shape of the separation tubes of the bottom layer of the separation tube row is a triangle, and the cross-sectional shapes of the separation tubes of the other layers of the separation tube rows except the bottom layer are all rhombuses, and each layer of the separation tube row is staggered with the separation tube rows of the two adjacent layers.

5. The cyclone-type Fenton reaction tower for deep sewage treatment according to claim 1, characterized in that: The water inlet main pipe (8) comprises a water inlet pipe, a first dosing pipe (16), and a swirl generator (17). The water inlet pipe is also provided with a water inlet flow meter (9) and a first pipeline mixer (10). The first dosing pipe (16) is connected to the water inlet pipe through the first pipeline mixer (10). The port at one end of the water inlet pipe is a water inlet, which is located outside the reaction tower body. The other end of the water inlet pipe penetrates into the reaction tower body and extends to the top of the guide plate (18). The port at one end is a trumpet-shaped water inlet and outlet, a swirl generator (17) is arranged in the pipe body above the water inlet and outlet, a second pipeline mixer is also arranged on the return pipe (22), one end of the second dosing pipe (21) is a second dosing port, the other end of the second dosing pipe (21) is connected to the return pipe (22) through the second pipeline mixer, a return pipe flowmeter (23) is also arranged on the return pipe (22), and a mud discharge pump (5) is arranged on the mud discharge pipe (20).

6. A cyclone-type Fenton reaction tower for deep sewage treatment according to claim 5, characterized in that: The swirl generator (17) comprises a hollow cylinder and a plurality of swirl plates, the plurality of swirl plates being evenly arranged along the outer circumference of the hollow cylinder, the two side edges of the swirl plates being respectively fixed obliquely on the outer wall of the hollow cylinder and the inner wall of the water inlet pipe, and the swirl direction generated by the swirl generator (17) is the same as the liquid swirl direction formed by all the jet branch pipes (12).

7. A cyclone-type Fenton reaction tower for deep sewage treatment according to claim 1, characterized in that: The reaction tower further comprises a fence (26) and a plurality of lightning rods (27), both of which are arranged on the top of the reaction tower body; an online pH meter and an OPR meter are arranged on the top of the reaction tower, and a staircase (3) is also arranged next to the reaction tower, and the top of the staircase (3) is connected to the top of the reaction tower.

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