High-concentration organic wastewater treatment and energy recovery system

Abstract

The invention provides a high-concentration organic wastewater treatment and energy recovery system, and relates to the technical field of wastewater treatment.The high-concentration organic wastewater treatment and energy recovery system comprises an air floatation tower, a wet oxidation reactor, a gas-liquid separator, a wastewater anaerobic tower and a gas-fired boiler, and the first output end of the air floatation tower is connected with the first input end of the wet oxidation reactor; the output end of the wet oxidation reactor is connected with the input end of the gas-liquid separator through the heat exchange assembly, the first output end of the gas-liquid separator is connected with the input end of the wastewater anaerobic tower, the first output end of the wastewater anaerobic tower is connected with the first input end of the gas-fired boiler, and the first output end of the gas-fired boiler is connected with the steam pipeline. In the invention, the pressurized wastewater separated by the gas-liquid separator flows into the wastewater anaerobic tower through the first output end of the gas-liquid separator, and the mixing and stirring of the wastewater in the wastewater anaerobic tower can be promoted by using the wastewater pressure, so that the wastewater pressure energy is fully utilized, the effective recovery of the wastewater pressure energy is realized, and the treatment energy consumption is further reduced; and the operation cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a high-concentration organic wastewater treatment and energy recovery system. Background Art

[0002] High-concentration organic wastewater with poor biodegradability (COD exceeding 50,000 mg / L) is typically treated using traditional processes, including flocculation and sedimentation or incineration. Flocculation and sedimentation not only produce large amounts of hazardous solid waste, but also retain a significant amount of difficult-to-biodegrade organic matter in the treated wastewater, necessitating subsequent oxidation, detoxification, and dilution biochemical treatment. Incineration, on the other hand, consumes significant amounts of natural gas and produces complex exhaust gases, making treatment costs extremely high. This is particularly true for nitrogen-containing compounds, where NOx is extremely difficult to treat to meet standards. Wet oxidation involves the use of gaseous oxygen (usually air) as an oxidant under high temperature (120-320°C) and high pressure (0.5-20 MPa) to oxidize organic matter in water into small-molecule organic or inorganic compounds. Wet oxidation has a wide range of applications in environmental fields, including industrial wastewater treatment, sludge disposal, and the recovery of useful inorganic salts, and has proven to be the most effective method for treating high-concentration, difficult-to-biodegrade organic wastewater. Through wet oxidation treatment, refractory organic matter in wastewater is broken down into small, biodegradable organic matter. Research has shown that the oxidation of 1g of COD generates 13.6kJ of heat. Therefore, when treating wastewater with a COD greater than 50,000mg / L, the wet oxidation reaction can generate significant heat energy. If this heat is not recovered, it would require significant amounts of circulating cooling water.

[0003] A Chinese patent with authorization announcement number CN114772832B discloses a wet oxidation treatment system and process for high-concentration organic wastewater, including a pressurized high-concentration wastewater storage tank, a high-concentration wastewater pump, a heat exchange reaction device, an oxygen supply unit and a post-reaction wastewater pressure storage tank; the wastewater after the wet oxidation reaction in the heat exchange reaction device is stored in the post-reaction wastewater pressure storage tank for gas-liquid separation, and the CO2-rich reaction gas is introduced into the high-concentration wastewater in the pressurized high-concentration wastewater storage tank in the high-concentration wastewater storage device under the action of pressure. The high-concentration wastewater in the pressurized high-concentration wastewater storage tank absorbs the CO2 in the introduced reaction gas and performs conditioning and modification on the high-concentration wastewater, thereby utilizing CO2 to significantly enhance the anti-scaling effect of the high-concentration wastewater treatment process, thereby improving the stability and reliability of the process. At the same time, the reflux of the reaction gas in the post-reaction wastewater pressure storage tank realizes the recovery and utilization of the residual pressure energy, thereby reducing the process energy consumption and treatment cost to a certain extent.

[0004] The above treatment system can recover the heat energy and pressure energy of the reaction gas during the wet oxidation treatment of high-concentration organic wastewater. However, the wastewater after wet oxidation treatment also has pressure, and the above treatment system does not recover the pressure energy of the wastewater, resulting in energy waste. Summary of the Invention

[0005] The present invention provides a high-concentration organic wastewater treatment and energy recovery system, which is used to solve the technical problem that the current treatment system fails to recover the pressure energy of the wastewater and wastes energy.

[0006] To solve the above technical problems, the present invention discloses a high-concentration organic wastewater treatment and energy recovery system, comprising: an air flotation tower, a wet oxidation reactor, a gas-liquid separator, a wastewater anaerobic tower and a gas boiler, wherein the first output end of the air flotation tower is connected to the first input end of the wet oxidation reactor, the output end of the wet oxidation reactor is connected to the input end of the gas-liquid separator via a heat exchange component, the first output end of the gas-liquid separator is connected to the input end of the wastewater anaerobic tower, the first output end of the wastewater anaerobic tower is connected to the first input end of the gas boiler, and the first output end of the gas boiler is connected to a steam pipe.

[0007] Preferably, the second output end of the gas-liquid separator is connected to the second input end of the flotation tower.

[0008] Preferably, the second output end of the wastewater anaerobic tower is connected to the input end of the aerobic tank.

[0009] Preferably, the flotation tower and the gas-liquid separator are connected via a first pipeline, a wastewater booster pump and a heat exchanger are sequentially arranged on the first pipeline, and the second input end of the wet oxidation reactor is connected to the output end of the air compressor.

[0010] Preferably, the heat exchange component includes a steam generator, a first input end of the steam generator is connected to the output end of the wet oxidation reactor, a first output end of the steam generator is connected to the steam pipe, a second output end of the steam generator is connected to the second input end of the heat exchanger, the second output end of the heat exchanger is connected to the input end of the gas-liquid separator through a second pipe, and a pressure reducing expansion valve is provided on the second pipe.

[0011] Preferably, the internal pressure of the wet oxidation reactor is 3-8 MPa, and the internal temperature of the wet oxidation reactor is 180-280°C.

[0012] Preferably, the first output end of the gas-liquid separator is connected to the wastewater anaerobic tower through a third pipe, and a first valve is provided on the third pipe. The wastewater anaerobic tower includes a tower body, a mixing chamber is provided in the tower body, an exhaust channel and an exhaust pipe are provided at the upper end of the tower body, the lower end of the exhaust channel and the lower end of the exhaust pipe are both connected to the mixing chamber, and the exhaust pipe is connected to the first input end of the gas boiler at one end away from the mixing chamber. A mounting seat is provided in the mixing chamber, a mounting hole is provided in the center of the mounting seat, a mounting column is provided in the mounting hole, the mounting column is connected to the inner wall of the mounting hole for sliding up and down, a stirring plate is provided outside the mounting column, the center of the stirring plate is connected to the outer wall of the mounting column for sliding up and down, a number of through holes are provided in the stirring plate, a number of driving blades are provided on the lower surface of the stirring plate, a rotating ring is provided for rotating near the outer wall of the upper end of the mounting column, a number of biological filler ropes are provided on the lower surface of the rotating ring, and microorganisms are attached to the biological filler ropes.

[0013] Preferably, a plurality of slide grooves are provided on the upper surface of the stirring disk, and the slide grooves are arranged radially along the stirring disk. A first magnetic block is slidably arranged in the slide groove, and one end of the first magnetic block is connected to the inner wall of the slide groove through a compression spring. A second magnetic block is provided at the lower end of the biological filler rope, and the magnetic pole of the second magnetic block close to one end of the first magnetic block is opposite to the magnetic pole of the upper end of the first magnetic block.

[0014] Preferably, a transition pipe is provided at the lower end of the exhaust channel, the transition pipe is trumpet-shaped, the diameter of the upper end of the transition pipe is smaller than the diameter of the lower end of the transition pipe, the upper end of the mounting column extends into the transition pipe and a blocking block is provided, the blocking block is used to block the exhaust channel, a fixed ring is provided below the rotating ring, a drive ring is provided at the center of the upper surface of the stirring disk, the drive ring is sleeved on the outside of the mounting column, and the drive ring is connected to the outer wall of the mounting column in an up and down sliding manner.

[0015] Preferably, a circulation pump is provided outside the tower body, an input end of the circulation pump is communicated with the mixing chamber, and an output end of the circulation pump is connected to the third pipeline.

[0016] The technical solution of the present invention has the following advantages: the present invention provides a high-concentration organic wastewater treatment and energy recovery system, which relates to the field of wastewater treatment technology, including an air flotation tower, a wet oxidation reactor, a gas-liquid separator, a wastewater anaerobic tower and a gas boiler, wherein the first output end of the air flotation tower is connected to the first input end of the wet oxidation reactor, the output end of the wet oxidation reactor is connected to the input end of the gas-liquid separator through a heat exchange component, the first output end of the gas-liquid separator is connected to the input end of the wastewater anaerobic tower, the first output end of the wastewater anaerobic tower is connected to the first input end of the gas boiler, and the first output end of the gas boiler is connected to a steam pipe. In the present invention, the pressurized wastewater separated by the gas-liquid separator flows into the wastewater anaerobic tower through the first output end of the gas-liquid separator, and the wastewater pressure can be used to promote mixing and stirring of the wastewater in the wastewater anaerobic tower, thereby fully utilizing the wastewater pressure energy, realizing effective recovery of the wastewater pressure energy, further reducing treatment energy consumption, and saving operating costs.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a high-concentration organic wastewater treatment and energy recovery system of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of the wastewater anaerobic tower in the present invention;

[0022] Figure 3 A top view of the stirring plate of the present invention;

[0023] Figure 4 For the present invention Figure 2 A magnified view of the structure at center A;

[0024] Figure 5 This is a schematic diagram of the blocking block blocking the exhaust channel in the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B in the middle.

[0026] Figure 1: Floatation tower; 2: Wet oxidation reactor; 3: Gas-liquid separator; 4: Anaerobic wastewater tower; 5: Gas boiler; 6: Aerobic tank; 7: Wastewater booster pump; 8: Air compressor; 9: Steam generator; 10: Heat exchanger; 11: Pressure reducing expansion valve; 12: Third pipeline; 13: Tower body; 14: Mixing chamber; 15: Exhaust channel; 16: Exhaust pipe; 17: Mounting base; 18: Mounting column; 19: Stirring disk; 20: Through hole; 21: Drive blade; 22: Rotating ring; 23: Biofiller Material rope; 24. Slide groove; 25. First magnetic block; 26. Compression spring; 27. Transition pipe; 28. Sealing block; 29. ​​Fixed ring; 30. Drive ring; 31. Circulation pump; 32. Inlet pipe; 33. Inlet flow duct; 34. Inlet groove; 35. Inlet hole; 36. Air cavity; 37. Outlet hole; 38. Outlet groove; 39. Outlet flow duct; 40. Mounting shell; 41. Electric push rod; 42. Sliding cylinder; 43. First sliding plate; 44. Second sliding plate; 45. Connecting spring; 46. Connecting column. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] The embodiment of the present invention provides a high-concentration organic wastewater treatment and energy recovery system, such as Figures 1-6 As shown, it includes: an air flotation tower 1, a wet oxidation reactor 2, a gas-liquid separator 3, a wastewater anaerobic tower 4 and a gas boiler 5. The first output end of the air flotation tower 1 is connected to the first input end of the wet oxidation reactor 2, the output end of the wet oxidation reactor 2 is connected to the input end of the gas-liquid separator 3 through a heat exchange component, the first output end of the gas-liquid separator 3 is connected to the input end of the wastewater anaerobic tower 4, the first output end of the wastewater anaerobic tower 4 is connected to the first input end of the gas boiler 5, and the first output end of the gas boiler 5 is connected to the steam pipe;

[0031] The second output end of the gas-liquid separator 3 is connected to the second input end of the air flotation tower 1;

[0032] The second output end of the wastewater anaerobic tower 4 is connected to the input end of the aerobic tank 6;

[0033] The flotation tower 1 is connected to the gas-liquid separator 3 via a first pipeline, on which a wastewater booster pump 7 and a heat exchanger 10 are sequentially arranged, and the second input end of the wet oxidation reactor 2 is connected to the output end of the air compressor 8;

[0034] The heat exchange component includes a steam generator 9, a first input end of the steam generator 9 is connected to the output end of the wet oxidation reactor 2, a first output end of the steam generator 9 is connected to the steam pipe, a second output end of the steam generator 9 is connected to the second input end of the heat exchanger 10, and the second output end of the heat exchanger 10 is connected to the input end of the gas-liquid separator 3 through a second pipe, and a pressure reducing expansion valve 11 is provided on the second pipe.

[0035] The working principle and beneficial effects of the above technical solution are as follows: high-concentration organic wastewater enters the flotation tower 1 through the input end of the flotation tower 1, is first degreased and impurities removed in the flotation tower 1, is pressurized by the wastewater booster pump 7, enters the heat exchanger 10 for preheating, and then enters the wet oxidation reactor 2 and reacts with the compressed gas output by the air compressor 8. Some organic matter in the high-concentration organic wastewater is oxidized by the compressed gas to form small molecular compounds. The high-temperature gas-liquid mixture discharged from the wet oxidation reactor 2 recovers heat energy in the steam generator 9 and the heat exchanger 10 respectively, and is then decompressed by the pressure reducing expansion valve 11 to form gas and liquid at a certain pressure in the gas-liquid separator 3, with a pressure range of 2 to 8 bar. The obtained pressurized gas is sent to the flotation tower 1 through the first pipeline to form ultrafine bubbles with a diameter of less than 10 μm. The ultrafine bubbles remove floating oil and impurities in the high-concentration organic wastewater, which can reduce the chemical oxygen demand of the high-concentration organic wastewater by 5,000 to 10,000 mg. / L, the oxygen content in the pressurized gas is less than 5%. After the pressurized gas forms ultrafine bubbles for flotation in the flotation tower 1, soluble organic matter therein enters the water body, and the remaining gas is discharged through the top of the flotation tower 1; the pressurized wastewater separated by the gas-liquid separator 3 flows into the wastewater anaerobic tower 4 through the first output end of the gas-liquid separator 3. The wastewater pressure can promote mixing and stirring of the wastewater in the wastewater anaerobic tower 4, thereby fully utilizing the wastewater pressure energy. After the wastewater is treated in the wastewater anaerobic tower 4, the chemical oxygen demand can be reduced by 10,000 to 30,000 mg / L; the methane-containing gas generated in the wastewater in the wastewater anaerobic tower 4 is sent to the gas boiler 5, which is heated to produce steam. The steam generated by the heating and the steam generated by the steam generator 9 are respectively fed into the steam pipeline for user use. The chemical oxygen demand of the wastewater after treatment in the wastewater anaerobic tower 4 is 500 to 1000 mg / L. The wastewater is then sent to the aerobic tank 6 for treatment to meet the standard and then sent for subsequent treatment. By optimizing the treatment system of high-concentration organic wastewater, the present invention effectively recovers the heat energy generated by the oxidation of organic matter in the high-concentration organic wastewater, the combustion heat energy of methane produced by the wastewater anaerobic tower 4, the pressure energy of the gas and the pressure energy of the wastewater, further reducing the treatment energy consumption, reducing the operating cost of high-concentration organic wastewater treatment, and improving the green level of high-concentration organic wastewater treatment.

[0036] Example 2

[0037] On the basis of the above-mentioned embodiment 1, the internal pressure of the wet oxidation reactor 2 is 3-8 MPa, and the internal temperature of the wet oxidation reactor 2 is 180-280°C.

[0038] The working principle and beneficial effects of the above technical scheme are as follows: under the conditions of an internal pressure of 3 to 8 MPa and an internal temperature of 180 to 280°C, the wet oxidation reactor 2 uses oxygen in the air to oxidize organic matter into small molecular organic matter and CO2, etc., the COD of the wastewater decreases by 20,000 to 80,000 mg / L, and the BC ratio is increased to above 0.5. The high-temperature and high-pressure water-gas mixture generated enters the steam generator 9, and after producing a certain amount of steam, the temperature drops by 30 to 100°C. The wastewater discharged from the flotation tower 1 is then preheated in the heat exchanger 10, and the temperature of the gas-liquid mixture drops by 30 to 80°C. The gas-liquid mixture is decompressed to 2 to 8 bar by the pressure-reducing expansion valve 11 and then sent to the gas-liquid separator 3. The above scheme can fully recycle and utilize the heat energy of the high-temperature and high-pressure water-gas mixture generated by the wet oxidation reactor 2, thereby reducing the operating cost of the treatment system.

[0039] Example 3

[0040] On the basis of Example 1 or 2, as Figure 2-Figure 6 As shown, the first output end of the gas-liquid separator 3 is connected to the wastewater anaerobic tower 4 through a third pipe 12, and a first valve is provided on the third pipe 12. The wastewater anaerobic tower 4 includes a tower body 13, a mixing chamber 14 is provided in the tower body 13, an exhaust channel 15 and an exhaust pipe 16 are provided at the upper end of the tower body 13, the lower end of the exhaust channel 15 and the lower end of the exhaust pipe 16 are both connected to the mixing chamber 14, and the exhaust pipe 16 is connected to the first input end of the gas boiler 5 at one end away from the mixing chamber 14. A mounting seat 17 is provided in the mixing chamber 14, and the mounting seat 17 A mounting hole is provided in the center, and a mounting post 18 is provided in the mounting hole. The mounting post 18 is connected to the inner wall of the mounting hole in an up-and-down sliding manner. A stirring disk 19 is provided outside the mounting post 18. The center of the stirring disk 19 is connected to the outer wall of the mounting post 18 in an up-and-down sliding manner. A plurality of through holes 20 are provided through the stirring disk 19. A plurality of driving blades 21 are provided on the lower surface of the stirring disk 19. A rotating ring 22 is provided for rotation near the outer wall of the upper end of the mounting post 18. A plurality of biological filler ropes 23 are provided on the lower surface of the rotating ring 22. Microorganisms are attached to the biological filler ropes 23.

[0041] The working principle and beneficial effects of the above technical solution are as follows: open the first valve, and the pressurized wastewater separated by the gas-liquid separator 3 enters the mixing chamber 14 through the third pipe 12. The third pipe 12 is tilted. When the pressurized wastewater flows out through the third pipe 12, it can push the driving blade 21 to move, thereby driving the stirring plate 19 to rotate outside the mounting column 18. At the same time, the pressurized wastewater can impact the wastewater in the mixing chamber 14 through pressure, and the wastewater pressure can promote the mixing of the wastewater in the wastewater anaerobic tower 4. The increase in wastewater in the mixing chamber 14 can push the stirring plate 19 to slide upward along the mounting column 18. At the same time, the wastewater can flow to the top of the stirring plate 19 through the through hole 20, and the wastewater and the living The biological filler rope 23 is in contact with the biological filler rope 23, and microorganisms are attached to the biological filler rope 23. The degradation and transformation of organic matter in the wastewater are carried out by the microorganisms. A plurality of stirring blades are arranged on the upper surface of the stirring disk 19. When the stirring disk 19 rotates, the stirring blades can be driven to rotate, thereby stirring the wastewater on the stirring disk 19, so that the wastewater is fully in contact with the biological filler rope 23, thereby improving the removal rate and efficiency of organic matter in the wastewater. After the treatment reaches the preset time, the third valve on the exhaust pipe 16 is opened, and the methane generated in the treatment process can be transported to the gas boiler 5 through the exhaust pipe 16, and is burned and heated by the gas boiler 5 to prepare steam, thereby making full use of the combustion heat energy of the methane and achieving the effect of energy saving.

[0042] Example 4

[0043] On the basis of Example 3, Figure 3 As shown, a plurality of chutes 24 are provided on the upper surface of the stirring disk 19, and the chutes 24 are arranged radially along the stirring disk 19. A first magnetic block 25 is slidably provided in the chutes 24, and one end of the first magnetic block 25 is connected to the inner wall of the chutes 24 through a compression spring 26. A second magnetic block is provided at the lower end of the biological filler rope 23, and the magnetic pole of the second magnetic block close to one end of the first magnetic block 25 is opposite to the magnetic pole of the upper end of the first magnetic block 25.

[0044] The working principle and beneficial effects of the above technical solution are as follows: during installation, the mounting post 18 is first inserted into the mounting hole, and the mounting post 18 drives the rotating ring 22 to move downward, and the rotating ring 22 drives the biological filler rope 23 downward, and the biological filler rope 23 corresponds to the slide groove 24 one by one, and the second magnetic block at the lower end of the biological filler rope 23 is attracted to the first magnetic block 25 in the slide groove 24, thereby fixing the lower end of the biological filler rope 23 and improving the stability of the biological filler rope 23. When the stirring disk 19 rotates, under the action of centrifugal force, the first magnetic block 25 slides along the slide groove 24 in the direction away from the mounting post 18, thereby straightening the biological filler rope 23, increasing the contact range of the biological filler rope 23 with the wastewater, and at the same time can drive the biological filler rope 23 to rotate, fully contacting the wastewater above the stirring disk 19, thereby improving the treatment efficiency of organic matter in the wastewater.

[0045] Example 5

[0046] On the basis of Example 3 or 4, Figure 2 As shown, a transition pipe 27 is provided at the lower end of the exhaust channel 15. The transition pipe 27 is trumpet-shaped. The diameter of the upper end of the transition pipe 27 is smaller than the diameter of the lower end of the transition pipe 27. The upper end of the mounting column 18 extends into the transition pipe 27 and is provided with a blocking block 28. The blocking block 28 is used to block the exhaust channel 15. A fixed ring 29 is provided below the rotating ring 22. A drive ring 30 is provided at the center of the upper surface of the stirring disk 19. The drive ring 30 is sleeved on the outside of the mounting column 18, and the drive ring 30 is connected to the outer wall of the mounting column 18 for sliding up and down connection.

[0047] The working principle and beneficial effects of the above technical solution are as follows: as the stirring disk 19 slides upward, the stirring disk 19 drives the drive ring 30 to move upward, the drive ring 30 contacts the fixed ring 29 and pushes the fixed ring 29 to move upward, the fixed ring 29 drives the mounting column 18 to slide upward in the mounting hole, the mounting column 18 drives the blocking block 28 to move upward, and the blocking block 28 enters the exhaust channel 15 to block the exhaust channel 15, thereby preventing the generated methane gas from flowing out of the exhaust channel 15.

[0048] Example 6

[0049] On the basis of any one of Examples 3-5, Figure 2 As shown, a circulation pump 31 is provided outside the tower body 13 , the input end of the circulation pump 31 is communicated with the mixing chamber 14 , and the output end of the circulation pump 31 is connected to the third pipeline 12 .

[0050] The working principle and beneficial effects of the above technical solution are as follows: when the wastewater in the mixing chamber 14 reaches a preset water volume, the first valve is closed, and then the circulation pump 31 is started. The circulation pump 31 can drive the wastewater to circulate, thereby continuously driving the stirring disk 19 to rotate, thereby improving the treatment efficiency of organic matter in the wastewater. A drain pipe is provided on the tower body 13, and the drain pipe is connected to the aerobic tank 6. After the preset treatment time, the second valve on the drain pipe is opened, and the wastewater can flow into the aerobic tank 6 for subsequent treatment.

[0051] Example 7

[0052] On the basis of any one of Examples 3-6, Figure 2 、 Figure 4As shown, it also includes a ventilation component, which includes an air inlet pipe 32, an air inlet channel 33, an air inlet groove 34, an air inlet hole 35, an air cavity 36, an air outlet hole 37, an air outlet groove 38 and an air outlet channel 39. The air inlet channel 33 is arranged in the mounting seat 17, and the air inlet groove 34 is arranged on the inner wall of the mounting seat 17. One end of the air inlet channel 33 is connected to the air inlet groove 34, and the other end of the air inlet channel 33 is connected to the air inlet pipe 32. The air inlet pipe 32 is arranged at the bottom of the tower body 13, and the air cavity 36 is arranged on the mounting seat 17. In the column 18, the air cavity 36 is connected to the air inlet groove 34 through the air inlet hole 35, a first one-way valve is provided in the air inlet hole 35, an air outlet groove 38 is provided on the inner wall of the stirring plate 19, the air cavity 36 is connected to the air outlet groove 38 through the air outlet hole 37, a second one-way valve is provided in the air outlet hole 37, and a plurality of outlet flow channels 39 are provided in the stirring plate 19. The outlet flow channels 39 are inclined, one end of the outlet flow channel 39 is connected to the air outlet groove 38, and the other end of the outlet flow channel 39 is connected to the top of the stirring plate 19.

[0053] The working principle and beneficial effects of the above technical solution are as follows: when wastewater is introduced into the mixing chamber 14 of the wastewater anaerobic tower 4, inert gas is injected into the mixing chamber 14 through the air inlet pipe 32, and the inert gas flows into the air inlet groove 34 through the inlet flow channel 33, and then flows into the air chamber 36 through the air inlet hole 35. Then, as the stirring plate 19 slides upward, the air outlet hole 37 is connected with the air outlet groove 38, and the high-pressure inert gas flows into the air outlet groove 38 through the air outlet hole 37, and then flows out from the multiple outlet flow channels 39 to the top of the stirring plate 19, and the mixing chamber 14 is filled with the high-pressure inert gas. The oxygen in the mixing chamber is discharged from the exhaust channel 15, reducing the oxygen concentration in the mixing chamber 14, thereby ensuring the anaerobic environment in the wastewater anaerobic tower 4. At the same time, the high-pressure inert gas impacts the wastewater, which can achieve the effect of stirring the wastewater, and helps the contact between the microorganisms on the biological filler rope 23 and the organic matter to be degraded, thereby improving the treatment efficiency. By setting the air inlet groove 34 and the air outlet groove 38, it can be ensured that the air outlet pipe and the air outlet groove 38 are connected for a long time during the upward sliding process of the stirring plate 19, thereby discharging more inert gas and improving the oxygen removal effect.

[0054] Example 8

[0055] On the basis of any one of Examples 3-7, Figure 2 、 Figure 4-Figure 6As shown, a mounting shell 40 is provided at the bottom of the tower body 13, and an electric push rod 41 is provided in the mounting shell 40. The upper end of the electric push rod 41 extends into the mounting hole and is connected to the lower end of the mounting column 18 through a connecting assembly. The connecting assembly includes a sliding cylinder 42, and the sliding cylinder 42 is slidably provided in the mounting hole. A first sliding plate 43 is slidably provided in the sliding cylinder 42, and a second sliding plate 44 is provided below the first sliding plate 43. The first sliding plate 43 and the second sliding plate 44 are connected by a connecting spring 45. The upper end of the electric push rod 41 extends into the sliding cylinder 42 and is connected to the lower surface of the second sliding plate 44. A connecting column 46 is provided on the upper surface of the first sliding plate 43. The upper end of the connecting column 46 passes through the top wall of the sliding cylinder 42 and is connected to the lower end of the mounting column 18.

[0056] The working principle and beneficial effects of the above technical solution are as follows: when the mounting post 18 slides upward, the mounting post 18 can drive the first sliding plate 43 to slide upward along the inner wall of the sliding cylinder 42, so that the connecting spring 45 is stretched. After the wastewater in the mixing chamber 14 is discharged through the drain pipe, the electric push rod 41 is started, and the electric push rod 41 extends upward to push the second sliding plate 44 to move upward. The second sliding plate 44 drives the first sliding plate 43 to move upward through the connecting spring 45. The first sliding plate 43 drives the mounting post 18 to move upward along the exhaust channel 15 through the connecting post 46 until the rotating ring 22 moves to the top of the exhaust channel 15. At this time, the first magnetic block 25 is separated from the second magnetic block, and then the biological filler rope 23 can be inspected, which is convenient for replacing or maintaining the failed biological filler rope 23, ensuring the degradation and conversion effect of the biological filler rope 23 on organic matter in the wastewater, improving the removal effect of the wastewater anaerobic tower 4 on organic matter, and improving the treatment efficiency. After the inspection is completed, the electric push rod 41 is controlled to retract, so that the mounting post 18 can be restored to its original position for the next treatment.

[0057] Example 9

[0058] On the basis of any one of Examples 3-8, a first electromagnetic ring is arranged at the bottom of the stirring disk 19, the first electromagnetic ring is arranged concentrically with the stirring disk 19, a second electromagnetic ring is arranged below the first electromagnetic ring, the second electromagnetic ring is arranged on the bottom wall of the mixing chamber 14, a liquid level sensor is arranged inside the mixing chamber 14, and a controller is arranged outside the tower body 13, and the controller is electrically connected to the first electromagnetic ring, the second electromagnetic ring, and the liquid level sensor, respectively.

[0059] The working principle and beneficial effects of the above technical solution are as follows: when the wastewater level in the mixing chamber 14 detected by the liquid level sensor reaches the preset liquid level, the controller controls the first electromagnetic ring and the second electromagnetic ring to be energized, and the first electromagnetic ring and the second electromagnetic ring are close to each other at one end and have the same magnetic poles, thereby producing a mutual repulsion effect. Under the action of mutual repulsion, the stirring disk 19 can rotate stably, thereby improving the stability of the stirring disk 19 and ensuring that the blocking block 28 enters the exhaust channel 15 to block the exhaust channel 15.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high-concentration organic wastewater treatment and energy recovery system, characterized in that: include: An air flotation tower (1), a wet oxidation reactor (2), a gas-liquid separator (3), a wastewater anaerobic tower (4) and a gas boiler (5); the first output end of the air flotation tower (1) is connected to the first input end of the wet oxidation reactor (2); the output end of the wet oxidation reactor (2) is connected to the input end of the gas-liquid separator (3) via a heat exchange component; the first output end of the gas-liquid separator (3) is connected to the input end of the wastewater anaerobic tower (4); the first output end of the wastewater anaerobic tower (4) is connected to the first input end of the gas boiler (5); and the first output end of the gas boiler (5) is connected to a steam pipeline.

2. A high-concentration organic wastewater treatment and energy recovery system according to claim 1, characterized in that: The second output end of the gas-liquid separator (3) is connected to the second input end of the gas flotation tower (1).

3. A high-concentration organic wastewater treatment and energy recovery system according to claim 1, characterized in that: The second output end of the wastewater anaerobic tower (4) is connected to the input end of the aerobic tank (6).

4. A high-concentration organic wastewater treatment and energy recovery system according to claim 1, characterized in that: The flotation tower (1) and the gas-liquid separator (3) are connected via a first pipeline, a wastewater booster pump (7) and a heat exchanger (10) are sequentially arranged on the first pipeline, and the second input end of the wet oxidation reactor (2) is connected to the output end of the air compressor (8).

5. A high-concentration organic wastewater treatment and energy recovery system according to claim 4, characterized in that: The heat exchange component comprises a steam generator (9), a first input end of the steam generator (9) is connected to an output end of a wet oxidation reactor (2), a first output end of the steam generator (9) is connected to a steam pipeline, a second output end of the steam generator (9) is connected to a second input end of a heat exchanger (10), the second output end of the heat exchanger (10) is connected to an input end of a gas-liquid separator (3) via a second pipeline, and a pressure reducing expansion valve (11) is arranged on the second pipeline.

6. A high-concentration organic wastewater treatment and energy recovery system according to claim 4, characterized in that: The internal pressure of the wet oxidation reactor (2) is 3 to 8 MPa, and the internal temperature of the wet oxidation reactor (2) is 180 to 280°C.

7. A high-concentration organic wastewater treatment and energy recovery system according to claim 1, characterized in that: The first output end of the gas-liquid separator (3) is connected to the wastewater anaerobic tower (4) via a third pipeline (12), and a first valve is arranged on the third pipeline (12). The wastewater anaerobic tower (4) comprises a tower body (13), a mixing chamber (14) is arranged in the tower body (13), an exhaust channel (15) and an exhaust pipe (16) are arranged at the upper end of the tower body (13), the lower end of the exhaust channel (15) and the lower end of the exhaust pipe (16) are both connected to the mixing chamber (14), and the end of the exhaust pipe (16) away from the mixing chamber (14) is connected to the first input end of the gas boiler (5), and a mounting seat (17) is arranged in the mixing chamber (14). (17) A mounting hole is arranged at the center, a mounting post (18) is arranged in the mounting hole, the mounting post (18) is connected to the inner wall of the mounting hole by sliding up and down, a stirring plate (19) is arranged outside the mounting post (18), the center of the stirring plate (19) is connected to the outer wall of the mounting post (18) by sliding up and down, a plurality of through holes (20) are arranged through the stirring plate (19), a plurality of driving blades (21) are arranged on the lower surface of the stirring plate (19), a rotating ring (22) is arranged near the upper end outer wall of the mounting post (18), a plurality of biological filler ropes (23) are arranged on the lower surface of the rotating ring (22), and microorganisms are attached to the biological filler ropes (23).

8. A high-concentration organic wastewater treatment and energy recovery system according to claim 7, characterized in that: A plurality of slide grooves (24) are arranged on the upper surface of the stirring disk (19), and the slide grooves (24) are arranged radially along the stirring disk (19). A first magnetic block (25) is slidably arranged in the slide groove (24), and one end of the first magnetic block (25) is connected to the inner wall of the slide groove (24) through a compression spring (26). A second magnetic block is arranged at the lower end of the biological filler rope (23), and the magnetic pole of the second magnetic block close to one end of the first magnetic block (25) is opposite to the magnetic pole of the upper end of the first magnetic block (25).

9. A high-concentration organic wastewater treatment and energy recovery system according to claim 7, characterized in that: A transition pipe (27) is arranged at the lower end of the exhaust passage (15). The transition pipe (27) is trumpet-shaped. The diameter of the upper end of the transition pipe (27) is smaller than the diameter of the lower end of the transition pipe (27). The upper end of the mounting column (18) extends into the transition pipe (27) and is provided with a blocking block (28). The blocking block (28) is used to block the exhaust passage (15). A fixed ring (29) is arranged below the rotating ring (22). A driving ring (30) is arranged at the center of the upper surface of the stirring disk (19). The driving ring (30) is sleeved on the outside of the mounting column (18). The driving ring (30) is slidably connected to the outer wall of the mounting column (18) up and down.

10. A high-concentration organic wastewater treatment and energy recovery system according to claim 7, characterized in that: A circulation pump (31) is arranged outside the tower body (13); an input end of the circulation pump (31) is communicated with the mixing chamber (14); and an output end of the circulation pump (31) is connected with the third pipeline (12).

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