Compound Fenton method supplemented with ceramic membrane filtration sewage processor

Abstract

A sewage treatment device with a combined Fenton method supplemented by ceramic membrane filtration includes an electrode area, a Fenton advanced oxidation treatment area, and an equipment control area. The electrode area is connected to a first water inlet pipe and then to one end of a first three-way solenoid valve. The other two ports of the first three-way solenoid valve are respectively connected to a sludge pipe and a second water inlet pipe. The equipment control area is provided with a ceramic membrane filter assembly, a system control box, and an ozone generator. The ceramic membrane filter assembly is provided with a membrane filter and a security filter. A water passing tray is arranged at the center position of the top of the Fenton advanced oxidation treatment area, and a sludge discharge valve is arranged at the bottom end. The water passing tray is connected to a middle rotating disk. A skimmer is also arranged at the top of the Fenton advanced oxidation treatment area. The invention can greatly reduce the occupied space of sewage treatment equipment, can control the operation of most systems through the system control box, realize an automated treatment process, and reduce the manpower for system management.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a sewage processor using a combined Fenton method supplemented by ceramic membrane filtration. Background Art

[0002] Leachate refers to the water in garbage itself during garbage transportation. After stacking and extrusion, sewage with high concentrations of organic matter and complex water quality flows out of the garbage dump. The traditional treatment process of leachate has always faced many problems. Traditional sewage treatment plants occupy a large amount of space and require long-term human resources management due to the use of a large number of chemicals.

[0003] Generally, primary treatment and secondary biological treatment are usually used in the sewage treatment process. That is, the sewage first undergoes preliminary physical treatment, such as using a grille to remove large solids, physical sedimentation to remove heavier solids in the water, and skimming the oil on the surface of the sewage; then it enters secondary treatment, mainly reducing the high concentration of COD in the sewage through biological treatment, such as using anaerobic biological treatment and aerobic biological treatment. To meet higher discharge standards, tertiary advanced treatment is also used to further reduce organic matter and suspended solids in the sewage, such as using membrane filtration, activated carbon adsorption, ion exchange, etc. The treated sewage can be directly discharged into nearby water bodies or reused.

[0004] However, the water quality of leachate is more complex and changes relatively more, and there may also be non-biodegradable pollutants and heavy metals. Using primary treatment and secondary biological treatment may not provide effective treatment and meet relevant discharge requirements. Moreover, the secondary biological treatment process takes a relatively long time and is affected by many factors, such as water quality, temperature, etc. Therefore, the effluent quality of highly variable sewage is relatively unstable, and a large amount of space is required to place treatment equipment and store sewage. It can be seen that the traditional sewage treatment process consumes a huge amount of resources.

[0005] In addition, current water quality supervision and discharge requirements are higher. Coupled with population growth, the demand for land increases, and the amount of sewage generated also increases significantly. Therefore, traditional treatment technologies may not meet the needs of all countries and regions. To meet current needs, the sewage treatment process is constantly improved. For example, existing leachate treatment plants will add membrane filtration technology after secondary biological treatment to further reduce the pollutant concentration; some studies also choose the Fenton oxidation method to directly treat leachate.

[0006] As a very efficient and suitable method for treating sewage, the Fenton oxidation method uses ferrous ions and hydrogen peroxide as catalysts. The two react to produce hydroxyl radicals and hydroxide ions. Hydroxyl radicals have extremely strong oxidation ability and decompose pollutants in water through oxidation reactions, thereby reducing the concentration of pollutants and achieving the discharge standard. The Fenton oxidation method can be divided into traditional Fenton, electro-Fenton, photo-Fenton, photoelectro-Fenton, sono-Fenton and pseudo-Fenton treatment. Compared with traditional treatment, the Fenton treatment process is relatively stable and has a shorter reaction time, and is also suitable for the operation of treatment plants with a small space.

[0007] In the prior art, the utility model patent with the publication number CN216038974U discloses an integrated wastewater processor for catalytic ozonation-Fenton reaction, including a reaction kettle, an ozone inlet pipe, a sewage pump, a jet mixer, an ozone generator and a dosing device; this processor can make the catalytic ozonation reaction and the Fenton reaction occur in the same reaction kettle to co-treat sewage, making the equipment have the advantages of efficient ozone utilization, improving the ozone mass transfer efficiency, preventing the packing from caking and segmenting, and improving the Fenton reaction efficiency, etc. However, the effect of ceramic membrane filtration is not combined, and after long-term use, incomplete filtration or inability to adapt to other polluted water qualities will occur

[0008] In the prior art, the invention patent with the publication number CN113713624A discloses a dual-ceramic membrane integrated device for sewage treatment and a pressure fault judgment method, including a nano-ceramic membrane biological filter tower, a first inorganic ceramic membrane filter, a second inorganic ceramic membrane filter, a filtration pump, a circulation pump, an on-line pressure sensor, a disinfection device and a control device, which can greatly reduce the project floor area, and there is no need to add medicine to the system during the project operation process, effectively avoiding secondary pollution. Due to the use of a dual-ceramic membrane combination, it provides an effective guarantee for the low-cost, maintenance-free and high-quality effluent of the sewage treatment project operation. However, the Fenton oxidation method is not selected to deal with landfill leachate, lacking the treatment ability of landfill leachate.

[0009] In summary, due to the long time required for the traditional treatment process, the treatment equipment often requires a large area, and when dealing with complex and variable sewage, the effluent quality is relatively unstable, etc.; in order to meet the current environmental requirements, the development of new sewage treatment equipment is urgent. Summary of the Invention

[0010] The purpose of the present invention is to aim at the deficiencies in the prior art and provide a composite Fenton method supplemented with a ceramic membrane sewage processor, which greatly reduces the occupied space of sewage treatment equipment. Through the system control box, most of the system operations can be controlled, realizing an automated treatment process and reducing the manpower for system management. To achieve the above purpose, the present invention is realized through the following technical solutions:

[0011] Composite Fenton method supplemented with ceramic membrane filtration sewage treatment device, including an electrode area and a Fenton advanced oxidation treatment area closely arranged therewith; the electrode area is connected to a first water inlet pipe, the first water inlet pipe is connected to one end of a first three-way solenoid valve, and the other two ports of the first three-way solenoid valve are respectively connected to a sludge pipe and a second water inlet pipe, and an ozone sewage mixing pump and a first acid-base dosing port are arranged on the second water inlet pipe; an ultrasonic generator is arranged at the bottom of the electrode area, and an electrode plate assembly is arranged inside; the sewage treatment device further includes an equipment control area, and a ceramic membrane filter assembly, a system control box, an ozone generator and a medicine bucket are arranged in the equipment control area, a high-frequency pulse power supply and an ultrasonic generator power supply are arranged in the middle of the equipment control area; the ceramic membrane filter assembly includes a membrane filter and a security filter, the water inlet end of the security filter is connected to a middle turntable through a delivery pipe, and a second three-way solenoid valve, a filtration pump and a third three-way solenoid valve are sequentially connected on the delivery pipe, the other end of the second three-way solenoid valve is connected to a backwash liquid medicine bucket, the filtration pump is arranged between the second three-way solenoid valve and the third three-way solenoid valve, the other end of the third three-way solenoid valve is connected to a backwash pipe, the water outlet end of the security filter is connected to the water inlet end of the membrane filter through a pipe, and the filtrate discharge pipe on the membrane filter is connected to the backwash pipe; a water passing tray is arranged at the center position of the top of the Fenton advanced oxidation treatment area, a sludge discharge valve is arranged at the bottom end of the Fenton advanced oxidation treatment area, the water passing tray is connected to the middle turntable, a second acid-base dosing port is arranged at the top of the middle turntable, the water outlet of the middle turntable is connected to a delivery pipe, and the delivery pipe is connected to the ceramic membrane filter assembly; a skimmer is further arranged at the top of the Fenton advanced oxidation treatment area, the skimmer includes a reducer and a perforated cylinder, the perforated cylinder is connected to a scum discharge port, and a spiral sheet is arranged inside the perforated cylinder;

[0012] The medicine bucket includes a hydrogen peroxide medicine bucket, a backwash liquid medicine bucket, a sulfuric acid medicine bucket and a sodium hydroxide medicine bucket; the hydrogen peroxide medicine bucket is connected to the ozone sewage mixing pump through a dosing pipe, and the sulfuric acid medicine bucket and the sodium hydroxide medicine bucket are respectively connected to the first acid-base dosing port and the second acid-base dosing port through a dosing pipe.

[0013] Preferably, the medicine bucket is arranged on the opposite side of the ceramic membrane filter assembly, the system control box and the ozone generator, the ozone generator is connected to the ozone sewage mixing pump, the high-frequency pulse power supply is electrically connected to the electrode plate assembly, and the ultrasonic generator power supply is electrically connected to the ultrasonic generator.

[0014] Preferably, the upper part of the electrode area is a hollow rectangular column structure, and the bottom is an inverted hollow rectangular pyramid structure; the upper part of the Fenton advanced oxidation treatment area is a cylindrical structure with an open top, and the bottom is a conical funnel structure; the middle turntable is a hollow square column structure; the second water inlet pipe is provided with rapid mixing blades, and the second water inlet pipe is further provided with a first 90° elbow, a second 90° elbow and a third 90° elbow. The first acid-base medicine injection port is arranged on the first 90° elbow, the ozone sewage mixing pump is arranged between the second 90° elbow and the third 90° elbow, and the second water inlet pipe is connected to an external water inlet transfer pump.

[0015] Preferably, the top of the electrode plate assembly is connected to a high-frequency pulse power supply through a copper bar. The electrode plate assembly is a replaceable assembly. The electrode plate material of the electrode plate assembly is one of iron, titanium or graphite. The adjacent two electrode plates of the electrode plate assembly are separated by an insulator. The insulator is nylon or epoxy resin. The current range provided by the high-frequency pulse power supply is 0 - 1000A.

[0016] Preferably, the water passing tray is further provided with an acid-base monitor and a liquid level sensor fixed by a support bracket.

[0017] Preferably, a partition is arranged on the middle turntable, and the position of the partition is higher than the scum discharge port.

[0018] Preferably, 2 groups of membrane filters are provided, and 1 group of security filters is provided. The water inlet of the security filter is connected to a delivery pipe, and the water outlet of the security filter is connected to the water inlet end of the membrane filter.

[0019] Preferably, a placement hole is arranged at the bottom of the electrode area, and the ultrasonic generator is installed in the placement hole. The ultrasonic generator is used to release ultrasonic waves of 20 - 35 kHz.

[0020] Preferably, the perforated cylinder is made of stainless steel. A speed reducer is arranged at one end of the perforated cylinder. The speed reducer is connected to the spiral blade through a connecting shaft. The perforated cylinder is horizontally placed in the Fenton advanced oxidation treatment area.

[0021] Preferably, a group of V-shaped grooves are arranged on each side of the top of the electrode area. One group of the V-shaped grooves extends into the Fenton advanced oxidation treatment area and is communicated with the Fenton advanced oxidation treatment area.

[0022] The beneficial effects of the present invention:

[0023] The present invention still adopts a three - stage advanced treatment scheme. However, in terms of treatment technology, it uses a multi - stage integrated Fenton treatment method and finally supplements it with a ceramic membrane filtration method to treat sewage. It integrates multiple Fenton treatment methods into one, achieving multi - stage oxidation to remove organic matter in sewage. After multi - stage treatment of sewage, the organic matter in sewage is greatly reduced. This design can also concentrate and closely install the treatment equipment, greatly reducing the occupied space of the sewage treatment equipment. Through the system control box, most of the system operations can be controlled, realizing the automatic treatment of sewage, which is convenient to use and reduces the manpower for system management. Brief Description of the Drawings

[0024] Figure 1 It is a three - dimensional structural schematic diagram of the sewage processor of the present invention;

[0025] Figure 2 It is a top - view structural schematic diagram of the sewage processor of the present invention;

[0026] Figure 3 It is a rear - view structural schematic diagram of the sewage processor of the present invention;

[0027] Figure 4 It is a right - view structural schematic diagram of the sewage processor of the present invention;

[0028] Figure 5 It is a bottom - view structural schematic diagram of the sewage processor of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the connection of the second water inlet pipe of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the electrode plate assembly of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the perforated cylinder of the present invention;

[0032] Figure 9 It is a pipeline connection schematic diagram of the ceramic membrane filter assembly of the present invention.

[0033] In the figure: 1. electrode area; 2. Fenton advanced oxidation treatment area; 3. electrode plate assembly; 4. first three-way solenoid valve; 5. sludge pipe; 6. first water inlet pipe; 7. second water inlet pipe; 8. ozone sewage mixing pump; 9. water passing tray; 10. sludge discharge valve; 11. middle turntable; 12. equipment control area; 13. system control box; 14. ozone generator; 15. chemical solution bucket; 16. high-frequency pulse power supply; 17. ultrasonic generator power supply; 18. ceramic membrane filtration module assembly; 19. first acid-base dosing port; 20. insertion hole; 21. V-shaped groove; 22. acid-base monitor; 23. liquid level sensor; 24. skimmer; 25. scum discharge port; 26. perforated cylinder; 27. spiral sheet; 28. reducer; 29. second acid-base dosing port; 30. conveying pipe; 31. filtration pump; 32. security filter; 33. membrane filter; 34. filtrate discharge pipe; 35. first 90° elbow; 36. second 90° elbow; 37. third 90° elbow; 38. backwash pipe; 39. second three-way solenoid valve; 40. third three-way solenoid valve. Detailed implementation manners

[0034] Next, in combination with the drawings and specific implementation manners, the present invention will be further described:

[0035] To make the purpose, technical solution and advantages of the present invention clearer and more definite, the following takes examples with reference to the drawings to further illustrate the present invention.

[0036] Embodiment 1:

[0037] As Figures 1 to 9 shown, a compound Fenton method supplemented with a ceramic membrane filtration sewage processor includes an electrode area 1 and a Fenton advanced oxidation treatment area 2 closely arranged with the electrode area 1; the upper part of the electrode area 1 is a hollow rectangular column structure, and the bottom is an inverted hollow rectangular cone structure; the upper part of the Fenton advanced oxidation treatment area 2 is a cylindrical structure with an open top, and the bottom is a conical funnel structure, and the middle turntable 11 is a hollow square column structure.

[0038] Among them, the electrode area 1 is connected to the first water inlet pipe 6, the other end of the first water inlet pipe 6 is connected to one end of the first three-way solenoid valve 4, and the other two ports of the first three-way solenoid valve 4 are respectively connected to the sludge pipe 5 and the second water inlet pipe 7, and the other end of the second water inlet pipe 7 is used to be connected to a water inlet transfer pump for water supply; an ozone sewage mixing pump 8 and a first acid-base dosing port 19 are also provided on the second water inlet pipe 7, a rapid mixing blade is provided in the second water inlet pipe 7, and the second water inlet pipe 7 has a plurality of 90° elbows, which are divided into a first 90° elbow 35, a second 90° elbow 36 and a third 90° elbow 37, and a first acid-base dosing port 19 is provided on the first 90° elbow 35, and the ozone sewage mixing pump 8 is arranged between the second 90° elbow 36 and the third 90° elbow 37.

[0039] An ultrasonic generator is provided at the bottom of the electrode region 1, and an electrode plate assembly 3 is arranged inside; there is a placement hole 20 at the bottom of the electrode region 1, and the ultrasonic generator is installed in the placement hole 20. The ultrasonic generator releases ultrasonic waves of 20 - 35 kHz, which can vibrate the sewage in the electrode region 1, make ions evenly distributed, and prevent the accumulation of pollutants on the electrode plates to maintain a sufficient reaction area. At the same time, the ultrasonic waves can also cause cavitation reactions to generate hydroxyl radicals and initiate the Fenton reaction. In addition, when the ultrasonic waves cooperate with the electrode plate assembly 3 to react, it can cause a demulsification effect on the sewage, so as to bring out the oily pollutants in the sewage and float them on the water surface, thereby improving the effect of the next-stage Fenton oxidation treatment. On both sides of the top of the electrode region 1, there is a set of V-shaped grooves 21 each, and one set of V-shaped grooves 21 extends into the Fenton advanced oxidation treatment region 2 and is connected to the Fenton advanced oxidation treatment region 2.

[0040] The electrode plate assembly 3 is arranged inside the electrode region 1, and the electrode plate assembly 3 is replaceable. There are two circular iron rings at the center position of the top of the electrode plate assembly 3, and its top is connected to the high-frequency pulse power supply 16 through a copper bar; the electrode plate assembly 3 adopted in the present invention is a replaceable assembly, and the electrode plate material of the electrode plate assembly 3 is iron or titanium or graphite and other materials. The electrode plate assembly 3 can be disassembled into an anode and a cathode assembly, and the anode and cathode assemblies can be replaced according to requirements; between every two adjacent electrode plates of the electrode plate assembly 3, they are separated by an insulator, and the insulator is nylon or epoxy resin and other materials, so that the electrode plates can be fixed at a certain distance to separate the anode and cathode electrode plates and avoid short circuits; there are two circular iron rings at the top position of the electrode plate assembly 3. When replacing and adjusting the electrode plate assembly 3, the circular iron rings can be used to lift the electrode plate assembly 3. The anode copper bar on the high-frequency pulse power supply 16 is connected to the de-anode at the top of the electrode plate, and the cathode copper bar on the high-frequency pulse power supply 16 is connected to the de-cathode at the top of the electrode plate. The current range provided by the high-frequency pulse power supply 16 is 0 - 1000 A. The replaceable design facilitates adjusting the electrode plate assembly 3 according to requirements, and at the same time, the current setting is also flexible, enabling the equipment to have a higher degree of freedom.

[0041] The ozone generator 14 is connected to the ozone sewage mixing pump 8. The speed mixing blades and the 90-degree elbow can change the sewage flow direction by impact and generate turbulence to mix the sewage with chemicals, thereby adjusting the pH value of the sewage and providing the best environment for the Fenton oxidation process. The ozone sewage mixing pump 8 is provided with an ozone inlet and a hydrogen peroxide injection port. The ozone generated by the ozone generator 14 can be connected to the ozone inlet, and the hydrogen peroxide in the hydrogen peroxide medicine bucket can be injected into the hydrogen peroxide injection port. By operating the ozone sewage mixing pump 8, ozone and hydrogen peroxide can be fully dissolved. The ozone sewage mixing pump 8 mixes ozone, hydrogen peroxide and sewage to fully dissolve ozone and hydrogen peroxide, promoting advanced oxidation to carry out further Fenton oxidation treatment.

[0042] In this embodiment, a first three-way solenoid valve 4 is selected at the inlet of the electrode area 1, which can connect two water inlet pipes and the sludge pipe 5 of the electrode area 1. The water inlet and sludge discharge processes are carried out through one inlet / outlet and a valve, which can minimize the size of the sewage treatment area and reduce loss-type fittings. The first three-way solenoid valve 4 can allow sewage to enter the electrode area 1 or discharge the sludge in the electrode area 1. The operation of the first three-way solenoid valve 4 is controlled by the system control box 13, and various electrical operations in the present invention are arranged in the system control box 13 to achieve centralized and automated operation of the device.

[0043] At the center of the top of the Fenton advanced oxidation treatment area 2 of the present invention, there is a water passing tray 9, and a sludge discharge valve 10 is provided at its bottom end. The water passing tray 9 is connected to the middle rotating disk 11, and an acid-base monitor 22 and a liquid level sensor 23 fixed by a support bracket are also provided on the water passing tray 9. At the top of the middle rotating disk 11, there is a second acid-base medicine injection port 29. At the top of the Fenton advanced oxidation treatment area 2, there is also a skimmer 24, which includes an open-hole cylinder 26 and a reduction gear 28. The reduction gear 28 is arranged at one end of the open-hole cylinder 26. The open-hole cylinder 26 is made of stainless steel and is connected to the scum discharge port 25. The open-hole cylinder 26 is placed horizontally, and a spiral sheet 27 is provided inside the open-hole cylinder 26. The connecting shaft of the spiral sheet 27 is connected to the reduction gear 28. When the spiral sheet 27 rotates, it will bring the scum into the open-hole cylinder 26 and then push it to the scum discharge port 25. A partition is also provided on the middle rotating disk 11, and the position of the partition is higher than the scum discharge port 25 to prevent the scum from flowing to the middle rotating disk 11. A water outlet is provided at the bottom of the middle rotating disk 11, and the water outlet of the middle rotating disk 11 is connected to a conveying pipe 30. The conveying pipe 30 is connected to a security filter 32 inside the ceramic membrane filter assembly 18.

[0044] The sewage processor of the present invention further includes an equipment control area 12, which is provided with a medicine bucket 15, a system control box 13, an ozone generator 14 and a ceramic membrane filter assembly 18. The medicine bucket 15 is arranged on the opposite side of the ceramic membrane filter assembly 18, the system control box 13 and the ozone generator 14. In the middle of the equipment control area 12, there is a high-frequency pulse power supply 16 and an ultrasonic generator power supply 17. The ozone generator 14 is connected to the ozone sewage mixing pump 8. The high-frequency pulse power supply 16 is electrically connected to the electrode plate assembly 3, and the ultrasonic generator power supply 17 is electrically connected to the ultrasonic generator to provide electrical energy for both.

[0045] The ceramic membrane filter assembly 18 is provided with a membrane filter 33 and a security filter 32. The water inlet end of the security filter 32 is connected to the middle turntable 11 through a delivery pipe 30. There are 2 groups of membrane filters 33 and 1 group of security filters 32. A second three-way solenoid valve 39, a filtration pump 31 and a third three-way solenoid valve 40 are successively arranged on the delivery pipe 30. The other end of the second three-way solenoid valve 39 is connected to a backwash liquid medicine bucket. The filtration pump 31 is arranged between the second three-way solenoid valve 39 and the third three-way solenoid valve 40. The other end of the third three-way solenoid valve 40 is connected to a backwash pipe 38. The water outlet end of the security filter 32 is connected to the water inlet end of the membrane filter 33 through a pipe. The filtrate discharge pipe 34 on the membrane filter 33 is connected to the backwash pipe 38. By controlling the second three-way solenoid valve 39 and the third three-way solenoid valve 40, the backwash liquid medicine bucket and the backwash pipe 38 are both disconnected from the delivery pipe 30. Then, by operating the filtration pump 31, the sewage is pumped into the security filter 32 for preliminary filtration, and the larger particle suspended solids in the sewage can be filtered out. The filtrate then enters the membrane filter 33 through the water outlet end of the security filter 32 for further filtration treatment. The filtrate enters the water accumulation pipe in the membrane filter 33, and the small particle molecules and water in the sewage are pushed out of the membrane filter 33 to the external water storage space by the pressure provided by the filtration pump 31. The large particle molecules in the sewage will be blocked by the filter layer in the membrane filter 33, thus achieving purification filtration. The filtrate is discharged through the filtrate discharge pipe 34. Since the membrane filter 33 is connected to the backwash pipe 38 through the filtrate discharge pipe 34, by controlling the second three-way solenoid valve 39 and the third three-way solenoid valve 40, the backwash liquid medicine bucket, the backwash pipe 38 and the delivery pipe 30 can be in a connected state. At this time, by operating the filtration pump 31, the backwash liquid can be pumped into the membrane filter 33. By regularly injecting the backwash liquid to wash the water accumulation pipe in the membrane filter 33, the pollutants accumulated on the surface and in the pores of the ceramic membrane can be removed, thus maintaining the effectiveness of the membrane filter 33.

[0046] The medicine buckets 15 include a hydrogen peroxide medicine bucket, a backwash liquid medicine bucket, a sulfuric acid medicine bucket and a sodium hydroxide medicine bucket. Among them, the hydrogen peroxide medicine bucket is connected to the ozone sewage mixing pump 8 through a medicine injection pipe. The sulfuric acid medicine bucket and the sodium hydroxide medicine bucket are respectively connected to the first acid-base medicine injection port 19 and the second acid-base medicine injection port 29 through medicine injection pipes.

[0047] Since the V-shaped groove 21 penetrates through the Fenton advanced oxidation treatment area 2, after the sewage flows into the electrode area 1 from the water inlet, it then surges out of the electrode area 1 and flows into the V-shaped groove 21, and the sewage enters the Fenton advanced oxidation treatment area 2 through the V-shaped groove 21 of the electrode area 1. This upward flow of water can make the sewage rise together with the bubbles generated after the electrode plate assembly 3 is electrified, carry the suspended solids in the sewage to the water surface, increase the reaction path and time between the sewage and the electrode plate, reduce the sewage activity and the odor released by the sewage activity, and also reduce the sewage splashing. This structure can avoid the need for additional pumps and pipes by flowing the sewage from the electrode area 1 to the Fenton advanced oxidation treatment area 2 through the V-shaped groove 21. At the same time, the drainage design of the V-shaped grooves 21 on both sides allows the sewage to flow out evenly, and the sewage can flow through the entire electrode plate, enabling the electrode plate to be evenly utilized and release ions, avoiding the bias of the electrode plate utilization towards the drainage direction due to the water discharge on one side.

[0048] The working process and principle of the present invention are as follows:

[0049] The untreated sewage is first pumped into the second water inlet pipe 7 by the water inlet transfer pump, and then sulfuric acid is injected from the first acid-base dosing port 19, and quickly mixes with the sewage in the second water inlet pipe 7. The acidic sewage will flow through the ozone-sewage mixing pump 8 arranged on the second water inlet pipe 7, and ozone and hydrogen peroxide are injected into the sewage through the ozone-sewage mixing pump 8. After the hydrogen peroxide reacts, it will release the oxidant hydroxyl radical, and ozone is also a very strong oxidant. The reaction between the two will oxidize the sewage. The ozone-sewage mixing pump 8 is operated to mix ozone and hydrogen peroxide with the sewage. And during the process of flowing through the quick-mixing blades arranged in the second water inlet pipe 7 and passing through the 90-degree elbow position, the sewage flow changes and generates turbulence, making ozone and hydrogen peroxide fully dissolve and mix with the sewage, reducing the pH value of the sewage and performing advanced oxidation and preparing for the Fenton advanced oxidation treatment. The sewage fully mixed with sulfuric acid, ozone and hydrogen peroxide flows through the first three-way solenoid valve 4 into the electrode area 1. At this time, the first three-way solenoid valve 4 closes the valve in the direction of the sludge pipe 5 and allows the sewage to flow into the electrode area 1. After the sewage enters the electrode area 1, it flows upward through the ultrasonic generator. The ultrasonic generator transmits ultrasonic waves into the electrode area 1, and the sewage continues to flow upward to the electrode plate assembly 3. The high-frequency pulse power supply 16 provides power. After the electrode plate assembly 3 is electrified, ferrous ions (Fe2+) and hydrogen (H2) will be released. The ultrasonic waves shock the ferrous ions and hydrogen away from the electrode plate assembly 3 and evenly disperse them in the electrode area 1. Through the electrode reaction, the demulsification process occurs, and the grease in the sewage will separate from the water. Through the vibration of hydrogen and ultrasonic waves, the grease can rise and float on the water surface. At the same time, the ultrasonic waves can also cause cavitation reactions, generate hydroxyl radicals, and initiate the Fenton reaction.

[0050] The sewage continues to flow upward to the top of the electrode area 1, and then flows into the V-shaped grooves 21 on both sides of the top of the electrode area 1, passes through the V-shaped grooves 21 and enters the Fenton advanced oxidation reaction area 2. Through the Fenton oxidation reaction, some of the organic matter in the sewage will be converted into scum, small molecule organic matter and inorganic matter. The scum passes through the skimmer 24 at the top of the Fenton advanced oxidation treatment area 2, and the scum is carried into the pipe and pushed to the scum discharge port 25 for discharge. The heavier molecules settle to the bottom of the cylinder by gravity to become sludge, and the sludge at the bottom of the cylinder can be discharged by opening the sludge discharge valve 10.

[0051] The sewage treated in the first step flows through the water passing tray 9 to the middle turntable 11. The middle turntable 11 has partitions and is higher than the scum discharge port 25, which can prevent the scum from flowing to the middle turntable 11. The middle turntable 11 is also provided with a second acid-base dosing port 29, and then the second acid-base dosing port 29 injects sodium hydroxide into the intermediate cylinder. The acid-base neutralization reduces the solubility of metal pollutants, thereby producing a precipitation effect. Then the sewage will be discharged from the bottom of the middle turntable 11 to the delivery pipe 30. The delivery pipe 30 is connected to the water inlet of the security filter 32 through the filter pump 31. By controlling the second three-way solenoid valve 39 and the third three-way solenoid valve 40 to close the backflush liquid medicine bucket channel and the connection between the backflush pipe 38 and the delivery pipe 30 respectively, the filter pump 31 is operated to pump the sewage into the security filter 32 for preliminary filtration, separating the larger particle suspended solids in the sewage. The filtrate enters the water collecting pipe in the membrane filter 33, and the small particle molecules and water in the sewage are pushed out of the membrane filter 33 to the external water storage space by the pressure provided by the filter pump 31. The large particle molecules in the sewage will be blocked by the filter layer in the membrane filter 33, and the filtrate will be discharged through the filtrate discharge pipe 34 for the next step of treatment. The membrane filter 33 is also provided with a backflush function. By controlling the second three-way solenoid valve 39 and the third three-way solenoid valve 40, the backflush liquid medicine bucket channel and the backflush pipe 38 are connected to the delivery pipe 30. The filter pump 31 is operated to pump the backflush liquid into the membrane filter 33, and the accumulated water collecting pipe is flushed by regularly injecting the backflush liquid to remove the pollutants accumulated on the membrane surface and pores, thereby maintaining the efficiency of the membrane filter 33.

[0052] Through multi-stage treatment of the sewage, the organic matter in the sewage can be greatly reduced. This design concentrates and tightly installs the treatment equipment, which can greatly reduce the occupied space of the sewage treatment equipment. And the whole sewage treatment is automated. Through the control system control box, most of the system operations can be controlled, which is convenient to use and reduces the manpower for system management.

[0053] For those skilled in the art, according to the technical solutions and concepts described above, various corresponding changes and deformations can be made, and all such changes and deformations should fall within the protection scope of the claims of this invention.

Claims

1. A composite Fenton process supplemented by ceramic membrane filtration sewage treatment device, characterized in that: The apparatus comprises an electrode area and a Fenton advanced oxidation treatment area arranged closely thereto; the electrode area is connected to a first water inlet pipe, the first water inlet pipe is connected to one end of a first three-way solenoid valve, the other two ports of the first three-way solenoid valve are respectively connected to a sludge pipe and a second water inlet pipe, and the second water inlet pipe is provided with an ozone sewage mixing pump and a first acid and alkali injection port; an ultrasonic generator is provided at the bottom of the electrode area, and an electrode plate assembly is provided inside; The sewage treatment device also includes an equipment control area, which is equipped with a ceramic membrane filter assembly, a system control box, an ozone generator and a medicine barrel. A high-frequency pulse power supply and an ultrasonic generator power supply are provided in the middle of the equipment control area; the ceramic membrane filter assembly is equipped with a membrane filter and a security filter, the water inlet end of the security filter is connected to the turntable through a delivery pipe, and the delivery pipe is also connected in sequence with a second three-way solenoid valve, a filter pump and a third three-way solenoid valve, the other end of the second three-way solenoid valve is connected to the backwash liquid medicine barrel, the filter pump is arranged between the second three-way solenoid valve and the third three-way solenoid valve, the other end of the third three-way solenoid valve is connected to the backwash pipe, the water outlet end of the security filter is connected to the water inlet end of the membrane filter through a pipeline, and the filtrate discharge pipe on the membrane filter is connected to the backwash pipe; A water pan is provided at the center of the top of the Fenton advanced oxidation treatment zone, a mud discharge valve is provided at the bottom of the Fenton advanced oxidation treatment zone, the water pan is connected to the turntable, a second acid and alkali injection port is provided on the top of the turntable, the water outlet of the turntable is connected to a delivery pipe, and the delivery pipe is connected to a ceramic membrane filter assembly; a skimmer is also provided on the top of the Fenton advanced oxidation treatment zone, the skimmer includes a reducer and a perforated cylinder, the perforated cylinder is connected to the scum discharge port, and a spiral blade is provided in the perforated cylinder; The medicine barrels include a hydrogen peroxide medicine barrel, a backwash liquid medicine barrel, a sulfuric acid medicine barrel and a sodium hydroxide medicine barrel; the hydrogen peroxide medicine barrel is connected to the ozone sewage mixing pump through an injection pipe, and the sulfuric acid medicine barrel and the sodium hydroxide medicine barrel are connected to the first acid and alkali injection port and the second acid and alkali injection port respectively through injection pipes; The upper portion of the electrode zone is a hollow rectangular column structure, and the bottom is an inverted hollow rectangular pyramid structure; the upper portion of the Fenton advanced oxidation treatment zone is a cylindrical structure with an open top, and the bottom is a conical funnel structure; the turntable is a hollow square column structure; the second water inlet pipe is provided with a rapid mixing blade, and the second water inlet pipe is also provided with a first 90° elbow, a second 90° elbow and a third 90° elbow, the first acid and alkali injection port is provided on the first 90° elbow, the ozone sewage mixing pump is provided between the second 90° elbow and the third 90° elbow, and the second water inlet pipe is connected to an external water delivery pump; A group of V-shaped grooves are respectively provided on both sides of the top of the electrode area, and one group of the V-shaped grooves extends into the Fenton advanced oxidation treatment area and is connected with the Fenton advanced oxidation treatment area.

2. The composite Fenton process combined with ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: The medicine barrel is arranged on the opposite side of the ceramic membrane filter assembly, the system control box and the ozone generator. The ozone generator is connected to the ozone sewage mixing pump. The high-frequency pulse power supply is electrically connected to the electrode plate assembly, and the ultrasonic generator power supply is electrically connected to the ultrasonic generator.

3. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: The top of the electrode plate assembly is connected to the high-frequency pulse power supply through a copper bar. The electrode plate assembly is a replaceable assembly. The electrode plate material of the electrode plate assembly is iron, titanium or graphite. The adjacent electrode plates of the electrode plate assembly are separated by an insulator, and the insulator is nylon or epoxy resin. The current range provided by the high-frequency pulse power supply is 0-1000A.

4. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: The water tray is also provided with an acid-base monitor and a liquid level sensor fixed by a support bracket.

5. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: The middle turntable is provided with a partition plate, and the position of the partition plate is higher than the slag discharge port.

6. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: Two groups of membrane filters are provided, and one group of security filters is provided. The water inlet of the security filter is connected to the delivery pipe, and the water outlet of the security filter is connected to the water inlet end of the membrane filter.

7. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: An insertion hole is provided at the bottom of the electrode area, and the ultrasonic generator is installed in the insertion hole. The ultrasonic generator is used to release ultrasonic waves of 20-35kHz.

8. The composite Fenton process supplemented by ceramic membrane filtration sewage treatment device according to claim 1, characterized in that: The perforated cylinder is made of stainless steel. A reducer is provided at one end of the perforated cylinder. The reducer is connected to the spiral sheet through a connecting shaft. The perforated cylinder is placed horizontally in the Fenton advanced oxidation treatment zone.

Images