Industrial heritage district sewage regenerative treatment system and method

Abstract

The application discloses an industrial heritage area sewage regenerative treatment system and method, and belongs to the sewage treatment field.The system comprises a filter box, at least two groups of filter plates and a discharge part are arranged in the filter box, and side discharge parts are arranged on the two sides of the filter box; the discharge part discharges floating matters laterally; the system further comprises an adjusting box one, an adjusting box two, a composite box, a deep cleaning pool and a disinfection tower which are sequentially connected through pipelines and a conveying pump; the adjusting box one; the adjusting box two, one side of the adjusting box two is provided with a dosing part, and the other side of the adjusting box two is provided with a storage part; the composite box, an anaerobic zone, an anoxic zone and an aerobic zone are arranged in the composite box to further remove phosphorus and ammonia nitrogen from the sewage; the deep cleaning pool, stirring equipment and an inclined tube sedimentation zone are arranged in the deep cleaning pool; the disinfection tower; a desulfurization tower, the anaerobic zone and the anoxic zone of the composite box are connected through a pipeline, and the pipeline is connected with an explosion-proof valve and an air pump; the desulfurization tower is used for desulfurization treatment of gas, so that the technical problems that the existing industrial heritage area wastewater is difficult to filter in the early stage of the regeneration process and the desulfurization treatment is insufficient to remove hydrogen sulfide are solved.

Description

Technical Field

[0001] This invention patent relates to a wastewater recycling system for industrial heritage sites, belonging to the field of wastewater treatment. Background Technology

[0002] As urban renewal strategies are further implemented, the protection and revitalization of industrial heritage areas have become an important approach to improving urban quality. However, industrial heritage areas generally suffer from problems such as aging drainage systems, incomplete separation of rainwater and sewage, and low water resource utilization efficiency.

[0003] Due to the long-term impact of historical industrial activities, the composition of wastewater from these areas is often more complex than that of ordinary municipal wastewater. To treat this wastewater into reclaimed water suitable for landscaping, a series of targeted treatments are required, along with a specially designed system to achieve safe and efficient reuse in landscaping. Existing industrial heritage areas often exhibit excessively high levels of single or multiple substances in their wastewater, including chemical oxygen demand (COD), heavy metals, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and dissolved salts.

[0004] But it still exists:

[0005] 1. Currently, the suspended solids in the wastewater of industrial heritage areas accumulate and multiply over time, leading to an increased need for pre-treatment. However, most existing systems use individual filter plates to complete the pre-treatment.

[0006] 2. For wet desulfurization devices for biogas, the common method is to spray absorbent liquid inside the desulfurization tower to ensure sufficient contact and reaction between the absorbent and hydrogen sulfide in the biogas, thereby achieving desulfurization. However, in actual operation, there are still problems such as insufficient biogas residence time and inadequate gas-liquid two-phase contact within the desulfurization tower.

[0007] Therefore, there is an urgent need to propose a wastewater recycling system for industrial heritage areas to solve the above problems. Summary of the Invention

[0008] To overcome the above shortcomings, the present invention provides a solution to the existing industrial heritage wastewater regeneration treatment system, which addresses the technical problems of difficult initial filtration and insufficient removal of hydrogen sulfide during the existing industrial heritage wastewater regeneration process.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A wastewater recycling system for industrial heritage sites includes:

[0011] The filter box has at least two sets of filter plates and discharge components inside, and side discharge sections are provided on both sides to discharge floating objects laterally; it also includes regulating box one, regulating box two, composite box, deep cleaning tank and disinfection tower connected in sequence by pipes and conveying pump;

[0012] Regulating tank one is used for sedimentation treatment of wastewater;

[0013] The second regulating box has a dosing section on one side and a storage section for sludge storage on the other side.

[0014] The composite tank has built-in anaerobic, anoxic, and aerobic zones for further phosphorus and ammonia nitrogen removal treatment of wastewater.

[0015] The deep cleaning tank, with built-in stirring equipment and inclined tube sedimentation zone, removes suspended solids from wastewater;

[0016] The disinfection tower disinfects and discharges the wastewater from the deep cleaning pool.

[0017] The desulfurization tower connects the anaerobic and anoxic zones of the composite tank via pipelines, which also connect to explosion-proof valves and air pumps. The desulfurization tower is used to desulfurize the gas.

[0018] In a further technical solution, the filter box is provided with a main material chamber and a feed opening at one end. A buffer plate is provided at the bottom of the feed opening, and the two ends of the buffer plate are rotatably connected to the inner walls of both sides of the filter box.

[0019] The filter box is equipped with filter plate one and filter plate two. The mesh diameter of filter plate one is larger than that of filter plate two.

[0020] Push belts are installed on filter plate one and filter plate two. Push plates are provided on the push belts to discharge the suspended matter at the bottom to the side discharge section.

[0021] In a further technical solution, the side discharge section is provided in two sets with different lengths; two sets of discharge rods are installed at the tail of the filter box, and spiral blades are provided on the discharge rods, with the two sets of spiral blades rotating in opposite directions.

[0022] Support bases are installed at both ends of the discharge rod;

[0023] Each set of discharge rods is equipped with a synchronous spiral blade on the upper side of the side discharge section, which is used to discharge suspended matter from the main material chamber to the side discharge section.

[0024] In a further technical solution, the regulating box includes a conical plate, on which upright rods are evenly distributed and installed, and activated carbon rings are sleeved on the upright rods;

[0025] Two sets of equalization tanks are arranged in parallel, with a parallel plate installed on the top. Inside each equalization tank is a partition, with a drain pipe at the bottom extending to the middle of the upper part of the partition. A rotary motor is installed on the parallel plate, and a screw rod is installed inside the equalization tank, with both ends connected to the parallel plate and the partition respectively. The screw rod is threadedly connected to a conical plate. The partition has filter holes, and a discharge port is installed on the side wall of the equalization tank located above the partition. This addresses the technical problem of difficult-to-clean sedimented sludge, where even with a sewage pump, a large amount of sludge adheres, especially at the bottom of the sediment. Existing equalization tanks mostly involve stirring, settling, and filtering before proceeding to subsequent anaerobic-aerobic reactions to remove phosphorus and ammonia nitrogen.

[0026] The parallel plate covers no more than 80% of the top area of ​​each regulating box, and the top of the regulating box is open.

[0027] In a further technical solution, the regulating box 2 includes a middle part, and a dosing part and a storage part are respectively provided on both sides of the middle part, and both the dosing part and the storage part are provided with inclined surfaces;

[0028] A high-level inlet pipe and a low-level return pipe are provided between the intermediate section and the dosing section, and both are equipped with underwater solenoid valves; a notch is provided between the intermediate section and the storage section;

[0029] A stirring rod is installed in the middle section, and a stirring motor is installed at the top. The stirring motor drives the stirring rod to rotate.

[0030] In a further technical solution, an overflow trough is provided above the side of the anaerobic zone, anoxic zone and aerobic zone, and an overflow pipe is provided at the overflow trough. The outlet of the overflow pipe is located at the bottom of the next zone for sewage flow and balancing.

[0031] Polyphosphate-accumulating bacteria are installed in the anaerobic zone for phosphorus removal from wastewater; denitrifying bacteria are installed in the anoxic zone for nitrogen removal from wastewater.

[0032] An aeration disc is installed in the middle of the aerobic zone, and a discharge hopper is installed at the bottom of the aeration disc.

[0033] In a further technical solution, the deep cleaning tank includes a cleaning motor, the output end of which is inserted into the deep cleaning tank and equipped with cleaning and stirring blades; an inclined pipe is also installed in the deep cleaning tank, with a serrated bottom and a sludge discharge pipe at the top.

[0034] In a further technical solution, the desulfurization tower is equipped with a guide plate and a wet spray pipe, with an air inlet pipe installed at the bottom and an air outlet pipe installed at the top; the air inlet pipe is supplied with biogas delivered by an air pump; a contact plate is installed inside the desulfurization tower above the air inlet pipe, the outer side of the contact plate is fixed to the inner wall of the desulfurization tower, and the outer diameter is equal to the inner diameter of the desulfurization tower; a mixed liquid of sodium carbonate and desulfurization catalyst is sprayed downward from the wet spray pipe;

[0035] Air holes are provided on the contact plate, and a guide tube is installed at the bottom of each group of air holes. The guide tube extends the contact area and time between biogas and mixed liquid.

[0036] The bottom of the multiple sets of guide cylinders is equipped with inclined blades; the outer side of the contact plate is equipped with a slewing bearing and is rotatably connected to the inner wall of the desulfurization tower.

[0037] In a further technical solution, the guide plate is an inclined plate, and its length is less than the outer diameter of the inner wall of the desulfurization tower; a water filter plate is installed between the air inlet pipe and the contact plate, and the water filter plate is provided with multiple sets of water permeable holes, and the water permeable holes are in the shape of a frustum with the middle higher and the outer side lower.

[0038] A treatment method for a wastewater recycling system in an industrial heritage area includes the following steps: Step 1, wastewater is discharged into a filter box through an open feed inlet, and the flow rate is reduced by impacting the buffer plate; then it passes through filter plate one to the bottom of the pusher belt, and the pusher belt drives the pusher plate to move under the operation of the pusher motor on one side; the pusher plate pushes the suspended matter between filter plate one and filter plate two to the side discharge section on one side.

[0039] Then, through the second filter plate, the discharge motor drives the synchronous belt through the synchronous pulley, so that the two sets of discharge rods rotate synchronously. Combined with the two sets of spiral blades set in opposite directions, the material is discharged to the side discharge section on both sides.

[0040] Step 2: Wastewater is introduced into regulating tank 1 through pipes and a transfer pump; the wastewater settles on the conical plate and adheres to the activated carbon rings; water passages allow some wastewater to flow to the bottom of the conical plate;

[0041] When it is necessary to handle the conical plate, the rotary motor drives the screw to rotate, causing the conical plate to rise and move to the open position, where the activated carbon ring is replaced and the surface sludge is cleaned.

[0042] Step 3: Wastewater discharged from regulating tank 1 in step 2 is introduced into regulating tank 2 through pipes and a delivery pump; when adding chemicals at home, the inlet pipe is opened, and the high-level water flows into the dosing section to form a mixed solution. Then, the return pipe is opened to mix the solution with the wastewater in the middle section. The mixture is then stirred by the stirring rod and discharged through the middle section.

[0043] Step 4: First, polyphosphate-accumulating bacteria are treated in the anaerobic zone of the composite tank; then, denitrifying bacteria are treated in the anoxic zone through the overflow pipe; then, aeration is carried out in the aerobic zone through the overflow pipe. Polyphosphate-accumulating bacteria are also stored in the aerobic zone. Each zone reacts for at least 6 hours. At room temperature, the pH value of the wastewater is between 6.5 and 7.5.

[0044] Step 5: Add PAC / PFS coagulant to the deep cleaning tank and then pass it through the inclined tube sedimentation zone 71 for separation and sedimentation after stirring.

[0045] Step 6: The disinfection tower further disinfects the wastewater from Step 5 to meet the composite reclaimed water standard.

[0046] The present invention has the following beneficial effects:

[0047] This invention utilizes two sets of side discharge sections for lateral discharge of suspended solids. A buffer plate prevents excessive water inflow from directly impacting the first filter plate. A pusher belt and pusher plate are installed between the first and second filter plates to continuously discharge suspended solids to the corresponding side discharge sections. The opposing spirals of the two sets of discharge rods consistently discharge suspended solids from both sides. The filter box of this invention has at least two sets of pushing structures for lateral discharge, reducing the amount of suspended solids on the surface of industrial heritage areas and preventing interference with subsequent conditioning and disinfection. This invention also incorporates a conical plate within the adjustable regulating box, allowing bottom sediment to rise and be discharged, avoiding surface sediment that is difficult to clean even with a cleaning pump, and enabling the replacement of activated carbon rings.

[0048] This invention uses a filter plate to evenly distribute the water flow from the center of the wet spray pipe downwards onto the contact plate. Air holes on the contact plate allow the water to enter the guide cylinder, achieving an "S"-shaped liquid-gas mixing at the bend, thus facilitating the desulfurization reaction. Furthermore, the inclined blades at the top press down, concentrating the airflow path and ensuring thorough mixing of the liquid and biogas. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the industrial heritage wastewater recycling system of the present invention;

[0050] Figure 2 This is a schematic diagram of the filter box of the present invention;

[0051] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0052] Figure 4 This is a front sectional view of the filter box of the present invention;

[0053] Figure 5 This is a structural diagram of the two sets of regulating boxes of the present invention;

[0054] Figure 6 This is a front sectional view of a single-unit regulating box of the present invention;

[0055] Figure 7 This is a schematic diagram of the structure of the regulating box II of the present invention;

[0056] Figure 8 This is a side sectional view of the regulating box II of the present invention;

[0057] Figure 9 This is a schematic diagram of the composite box of the present invention;

[0058] Figure 10 This is a front cross-sectional view of the composite box of the present invention;

[0059] Figure 11 This is a front sectional view of the deep cleaning tank of the present invention;

[0060] Figure 12 This is a vertical sectional view of the desulfurization tower of the present invention.

[0061] legend:

[0062] 1. Filter box; 11. Side discharge section; 12. Main material chamber; 13. Buffer connecting plate; 14. Filter plate one; 15. Filter plate two; 16. Push belt; 17. Push plate; 18. Discharge rod; 19. Spiral blade; 110. Support base; 111. Discharge motor; 112. Synchronous pulley; 113. Synchronous belt;

[0063] 2. Pipelines; 3. Transfer pumps;

[0064] 4. Regulating box 1; 41. Conical plate; 42. Vertical rod; 43. Activated carbon ring; 44. Parallel plate; 45. Baffle plate; 46. Drain pipe; 47. Rotary motor; 48. Screw rod;

[0065] 5. Regulating tank 2; 51. Dosing section; 52. Storage section; 53. Intermediate section; 54. Inlet pipe; 55. Return pipe; 56. Stirring rod; 57. Stirring motor;

[0066] 6. Composite box; 61. Anaerobic zone; 62. Anoxic zone; 63. Aerobic zone; 64. Overflow pipe; 65. Aeration disc; 66. Discharge hopper;

[0067] 7. Deep cleaning tank; 71. Inclined tube sedimentation zone; 72. Cleaning motor; 73. Cleaning agitator blades; 74. Inclined tube; 75. Sludge discharge pipe;

[0068] 8. Disinfection tower;

[0069] 9. Desulfurization tower; 91. Explosion-proof valve; 92. Air pump; 93. Guide plate; 94. Wet spray pipe; 95. Air inlet pipe; 96. Air outlet pipe; 97. Contact plate; 98. Guide cylinder; 910. Filter plate. Detailed Implementation

[0070] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0071] Example 1

[0072] like Figure 1-10 This is one embodiment of the present invention, specifically a wastewater recycling system for industrial heritage sites, comprising:

[0073] The filter box 1 has at least two sets of filter plates and discharge components inside, and side discharge sections 11 are provided on both sides to discharge floating objects laterally; it also includes regulating box 4, regulating box 5, composite box 6, deep cleaning tank 7 and disinfection tower 8 connected in sequence through pipe 2 and conveying pump 3.

[0074] Regulating tank 4 is used for sedimentation treatment of sewage;

[0075] The regulating box 2 5 has a dosing section 51 on one side and a storage section 52 for storing sludge on the other side.

[0076] The composite tank 6 has an internal anaerobic zone 61, an anoxic zone 62 and an aerobic zone 63 for further phosphorus and ammonia nitrogen removal treatment of wastewater;

[0077] The deep cleaning tank 7 has a built-in stirring device and an inclined tube sedimentation zone 71 to remove suspended solids from the sewage.

[0078] Disinfection tower 8 disinfects and discharges the wastewater from deep cleaning tank 7; it mainly involves disinfection with sodium hypochlorite and ultraviolet light, both using existing structures and processes. Sodium hypochlorite is poured into the disinfection tower in a controlled ratio, with the ratio and time meeting standards. Ultraviolet light disinfection is installed at the reclaimed water outlet to ensure it meets reclaimed water specifications. Subsequently, the reclaimed water can be used in a tiered manner for landscape water replenishment, greening irrigation, and road washing.

[0079] The desulfurization tower 9 is connected to the anaerobic zone 61 and the anoxic zone 62 of the composite box 6 via pipe 2. Pipe 2 connects to an explosion-proof valve 91 and a gas pump 92. The explosion-proof valve is used for pressure balancing and emergency pressure relief, and in actual use, it is combined with a flame arrester for biogas transportation. The desulfurization tower 9 is used to desulfurize the gas, which mainly consists of methane (CH4) and carbon dioxide (CO2), and also contains small amounts of impurities such as hydrogen sulfide (H2S). Effective recovery and utilization of this biogas not only helps reduce greenhouse gas emissions but also provides energy support for wastewater treatment plants.

[0080] The desulfurization tower uses an alkaline solution as an absorbent, along with a catalyst, to absorb and treat biogas. The alkaline solution uses sodium carbonate solution as the absorbent, and a desulfurization catalyst, primarily composed of ammonium cobalt sulfonate, is added to promote the reaction.

[0081] Workflow:

[0082] 1) Absorption: Sodium carbonate solution absorbs hydrogen sulfide from biogas in a scrubbing tower.

[0083] 2) Regeneration: The rich solution that has absorbed hydrogen sulfide enters the regeneration tank, air is introduced, and under the action of a catalyst, the sulfides are converted into elemental sulfur, while the sodium carbonate solution is regenerated and recycled.

[0084] exist Figure 2 In the filter box 1, there is a main material chamber 12 and a feed opening at one end. A buffer plate 13 is provided at the bottom of the feed opening. The two ends of the buffer plate 13 are rotatably connected to the inner walls of both sides of the filter box 1. The buffer plate prevents the large impact of the incoming water from directly impacting the filter plate.

[0085] The filter box 1 is equipped with a filter plate 14 and a filter plate 15. The mesh diameter of the filter plate 14 is larger than that of the filter plate 15.

[0086] A pusher belt 16 is installed on filter plate 14 and filter plate 15. A pusher plate 17 is provided on the pusher belt 16. The pusher belt drives the pusher plate to move without colliding with the inner walls of the filter boxes on both sides, and is used to discharge the suspended matter at the bottom to the side discharge section 11. Rollers are installed at both ends of the pusher belt, and the two ends of the rollers are supported on filter plate 1 and filter plate 2. A pusher motor is installed at the end of a set of rollers to drive the pusher belt to rotate.

[0087] The side discharge section 11 is provided with two sets of discharge rods of different lengths. The longer side discharge section supports the two sets of discharge rods and is equipped with an end drive to rotate the two sets of discharge rods. A recovery pipe and a recovery pump are provided at the bottom for collecting suspended solids. Two sets of discharge rods 18 are installed at the tail of the filter box 1. The discharge rods 18 are equipped with spiral blades 19, and the two sets of spiral blades 19 rotate in opposite directions.

[0088] Support seats 110 are installed at both ends of the discharge rod 18;

[0089] Each set of discharge rods 18 is equipped with a synchronous spiral blade 19 on the upper side of the side discharge section 11, used to discharge suspended matter from the main material chamber 12 to the side discharge section 11. Figure 2 and 3 Both sets of discharge rods are equipped with end wheels on the same side. A mounting frame is installed on the outside of the side discharge section. A discharge motor 111 is installed on the mounting frame. A synchronous shaft is installed at the output end of the discharge motor 111. Two sets of synchronous pulleys 112 are installed on the synchronous shaft. They are connected to the end wheels through a synchronous belt 113 to form a transmission.

[0090] like Figure 5 and 6 The regulating box 4 includes a conical plate 41, on which upright rods 42 are evenly distributed, and activated carbon rings 43 are sleeved on the upright rods 42; two sets of regulating boxes 4 are arranged in parallel, and a parallel plate 44 is installed on the top; a partition 45 is installed inside the regulating box 4, and a drain pipe 46 is installed at the bottom of the partition 45 and extends to the middle of the upper part of the partition 45; a rotary motor 47 is installed on the parallel plate 44, and a screw rod 48 is installed inside the regulating box 4, with both ends of the screw rod 48 connected to the parallel plate 44 and the partition 45 respectively; the screw rod 48 is threadedly connected to the conical plate 41; Figure 6 As shown, the partition 45 is provided with a water filter hole, and the side wall of the regulating box 4 located above the partition 45 is provided with a discharge port 49.

[0091] The parallel plate 44 covers no more than 80% of the top area of ​​each regulating box 4, and the top of the regulating box 4 is open. The open design ensures that when the rotary motor drives the conical plate to rise along the spiral rod, part of the uprights and activated carbon rings extend to the open position, which can then be manually cleaned and rinsed to replace the activated carbon rings and remove the sludge from the surface of the conical plate.

[0092] like Figure 7 As shown, the regulating box 5 includes a middle section 53, with a dosing section 51 and a storage section 52 respectively located on both sides of the middle section 53. Both the dosing section 51 and the storage section 52 are provided with inclined surfaces, such as... Figure 8 As shown, the inclined surfaces of the dosing section and the storage section both decrease from left to right. The inlet pipe 54 is higher than the return pipe 55. The underwater solenoid valve is not shown; it controls the opening and closing of the inlet and return pipes. When the inlet pipe is opened, high-level water flows into the dosing section, forming a mixed solution. Then, by opening the return pipe, the solution mixes with the wastewater from the intermediate section, further agitated by the stirring rod. The regulating tank is used for conditioning, primarily for acid-base balance and further removal of bottom sediment.

[0093] A high-level inlet pipe 54 and a low-level return pipe 55 are provided between the intermediate section 53 and the dosing section 51, and both are equipped with underwater solenoid valves; a notch is provided between the intermediate section 53 and the storage section 52.

[0094] A stirring rod 56 is installed inside the middle part 53, and a stirring motor 57 is installed at the top. The stirring motor 57 drives the stirring rod 56 to rotate.

[0095] like Figure 9 and 10 An overflow trough is provided on the upper side of the anaerobic zone 61, the anoxic zone 62 and the aerobic zone 63. An overflow pipe 64 is provided at the overflow trough. The outlet of the overflow pipe 64 is located at the bottom of the next zone and is used for sewage flow and balance.

[0096] An anaerobic zone 61 contains polyphosphate-accumulating bacteria for phosphorus removal from wastewater; an anoxic zone 62 contains denitrifying bacteria for nitrogen removal from wastewater. Polyphosphate-accumulating bacteria release phosphorus and absorb easily degradable organic matter, creating conditions for subsequent aerobic superphosphate uptake. Denitrifying bacteria use organic matter to reduce nitrates to nitrogen gas, achieving nitrogen removal. Nitrifying bacteria oxidize ammonia nitrogen to nitrate; polyphosphate-accumulating bacteria super-absorb phosphorus.

[0097] An aeration disc 65 is installed in the middle of the aerobic zone 63, and a discharge hopper 66 is installed at the bottom of the aeration disc 65. The aeration disc discharges the disordered wastewater through an overflow mechanism. Figure 10 Gas overflows from the top right side and is introduced at a higher pressure from the bottom to fully increase the gas volume.

[0098] This invention utilizes two sets of side discharge sections for lateral discharge of suspended solids. A buffer plate prevents excessive water inflow from directly impacting the first filter plate. A pusher belt and pusher plate are installed between the first and second filter plates to continuously discharge suspended solids to the corresponding side discharge sections. The opposing spirals of the two sets of discharge rods consistently discharge suspended solids from both sides. The filter box of this invention has at least two sets of pushing structures for lateral discharge, reducing the amount of suspended solids on the surface of industrial heritage areas and preventing interference with subsequent conditioning and disinfection. This invention also incorporates a conical plate within the adjustable regulating box, allowing bottom sediment to rise and be discharged, avoiding surface sediment that is difficult to clean even with a cleaning pump, and enabling the replacement of activated carbon rings.

[0099] Example 2

[0100] like Figure 11 and 12As shown, another embodiment of the present invention is illustrated. Based on embodiment 1, the deep cleaning tank 7 includes a cleaning motor 72, the output end of which is inserted into the deep cleaning tank 7 and equipped with a cleaning stirring blade 73. An inclined pipe 74 is also installed inside the deep cleaning tank 7, with a serrated bottom and a sludge discharge pipe 75 at the top. The deep cleaning tank can be supplemented with coagulants such as PAC / PFS to achieve partial flocculation of suspended solids, remove suspended solids, and perform chemical phosphorus removal.

[0101] like Figure 12 The desulfurization tower 9 is equipped with a guide plate 93 and a wet spray pipe 94. An air inlet pipe 95 is installed at the bottom and an air outlet pipe 96 is installed at the top. The air inlet pipe 95 is supplied with biogas delivered by the air pump 92. A contact plate 97 is installed in the desulfurization tower 9 above the air inlet pipe 95. The outer side of the contact plate 97 is fixed to the inner wall of the desulfurization tower 9, and the outer diameter is equal to the inner diameter of the desulfurization tower 9. A mixture of sodium carbonate and desulfurization catalyst is sprayed downward from the wet spray pipe 94.

[0102] Air holes are provided on the contact plate 97, and a guide cylinder 98 is installed at the bottom of each set of air holes. The guide cylinder 98 extends the contact area and time between biogas and mixed liquid.

[0103] The bottom of the multiple sets of guide cylinders 98 is provided with inclined blades 99; the outer side of the contact plate 97 is provided with a slewing bearing and is rotatably connected to the inner wall of the desulfurization tower 9.

[0104] The guide plate 93 is an inclined plate, and its length is less than the outer diameter of the inner wall of the desulfurization tower 9; a filter plate 910 is installed between the air inlet pipe 95 and the contact plate 97. The filter plate 910 is provided with multiple sets of water permeable holes, and the water permeable holes are in the shape of a frustum with a high center and a low outer side.

[0105] A treatment method for a wastewater recycling system in an industrial heritage area is characterized by the following steps: Step 1, wastewater is discharged into a filter box 1 through an open feed inlet, and the flow rate is reduced by the impact buffer plate 13; then it passes through a filter plate 14 to the bottom of a pusher belt 16, and the pusher belt 16 drives a pusher plate 17 to move under the operation of a pusher motor on one side; the pusher plate 17 pushes the suspended matter between the filter plate 14 and the filter plate 15 to a side discharge section 11 on one side.

[0106] Then, through the filter plate 15, the discharge motor 111 drives the synchronous belt 113 through the synchronous wheel 112 to make the two sets of discharge rods 18 rotate synchronously. Combined with the two sets of spiral blades 19 set in opposite directions, the material is discharged to the side discharge section 11 on both sides.

[0107] Step 2: Wastewater is introduced into regulating tank 4 through pipe 2 and transfer pump 3; the wastewater settles on conical plate 41 and adheres to activated carbon ring 43; water passage allows some wastewater to flow into the bottom of conical plate 41.

[0108] When it is necessary to directly access the conical plate 41, the rotary motor 47 drives the screw rod 48 to rotate, causing the conical plate 41 to rise. The conical plate 41 moves to the open position to replace the activated carbon ring 43 and clean the surface sediment sludge.

[0109] Step 3: Wastewater discharged from regulating tank 4 in step 2 is introduced into regulating tank 2 5 through pipe 2 and transfer pump 3; when adding medicine at home, pour in the medicine 51, open the inlet pipe 54, and the high-level water flows into the medicine addition section 51 to form a mixed medicine solution. Then, by opening the return pipe 55, it is mixed with the wastewater in the middle section 53. Combined with the stirring rod 56, the liquid is mixed; and then discharged through the middle section 53.

[0110] Step 4: In the composite tank 6, polyphosphate-accumulating bacteria are first treated in the anaerobic zone 61; then, the wastewater is introduced into the anoxic zone 62 through the overflow pipe 64 for denitrifying bacteria treatment; subsequently, it is introduced into the aerobic zone 63 through the overflow pipe 64 for aeration treatment, where polyphosphate-accumulating bacteria are also stored; each zone reacts for at least 6 hours, and at room temperature, the pH value of the wastewater is between 6.5 and 7.5.

[0111] Step 5: Add PAC / PFS coagulant to the deep cleaning tank 7, and after stirring, pass the wastewater into the inclined tube sedimentation zone 71 for separation and sedimentation.

[0112] Step 6: Disinfection tower 8 performs further disinfection on the wastewater from step 5 to meet the composite reclaimed water standard.

[0113] This invention uses a filter plate to evenly distribute the water flow from the center of the wet spray pipe downwards onto the contact plate. Air holes on the contact plate allow the water to enter the guide cylinder, achieving an "S"-shaped liquid-gas mixing at the bend, thus facilitating the desulfurization reaction. Furthermore, the inclined blades at the top press down, concentrating the airflow path and ensuring thorough mixing of the liquid and biogas.

[0114] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater recycling system for industrial heritage sites, characterized in that, include: The filter box (1) has at least two sets of filter plates and discharge components inside, and side discharge sections (11) are provided on both sides. The discharge components discharge floating objects laterally. It also includes regulating box one (4), regulating box two (5), composite box (6), deep cleaning pool (7) and disinfection tower (8) connected in sequence through pipe (2) and conveying pump (3). Regulating tank 1 (4) is used to settle sewage; The regulating box 2 (5) has a dosing section (51) on one side and a storage section (52) for storing sludge on the other side. The composite tank (6) has an internal anaerobic zone (61), anoxic zone (62) and aerobic zone (63) for further phosphorus and ammonia nitrogen removal treatment of wastewater; The deep cleaning tank (7) has a built-in stirring device and an inclined tube sedimentation zone (71) to remove suspended solids from the sewage; The disinfection tower (8) disinfects and discharges the sewage from the deep cleaning tank (7); The desulfurization tower (9) is connected to the anaerobic zone (61) and the anoxic zone (62) of the composite box (6) via a pipe (2). The pipe (2) is connected to the explosion-proof valve (91) and the gas pump (92). The desulfurization tower (9) is used to desulfurize the gas.

2. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, The filter box (1) is provided with a main material chamber (12) and a feed opening at one end. A buffer connecting plate (13) is provided at the bottom of the feed opening. The two ends of the buffer connecting plate (13) are rotatably connected to the inner walls of both sides of the filter box (1). The filter box (1) is equipped with filter plate one (14) and filter plate two (15), and the mesh diameter of filter plate one (14) is larger than that of filter plate two (15). Push belts (16) are installed on filter plate one (14) and filter plate two (15), and push plates (17) are provided on push belts (16) to discharge the suspended matter at the bottom to the side discharge section (11).

3. The wastewater recycling system for industrial heritage areas according to claim 2, characterized in that, The side discharge section (11) is provided in two sets with different lengths; two sets of discharge rods (18) are installed at the tail of the filter box (1), and spiral blades (19) are provided on the discharge rods (18), with the two sets of spiral blades (19) rotating in opposite directions; Support seats (110) are installed at both ends of the discharge rod (18); Each set of discharge rods (18) is equipped with a synchronous spiral blade (19) on the upper side of the side discharge section (11) to discharge suspended matter from the main material chamber (12) to the side discharge section (11).

4. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, The regulating box (4) includes a conical plate (41), on which upright rods (42) are evenly distributed and installed, and an activated carbon ring (43) is sleeved on the upright rods (42); water passage holes are provided on the conical plate (41); Two sets of regulating boxes (4) are arranged in parallel, and a parallel plate (44) is installed on the top. A partition (45) is installed inside the regulating box (4), and a drain pipe (46) is installed at the bottom of the partition (45) and extends to the middle of the upper part of the partition (45). A rotary motor (47) is installed on the parallel plate (44), and a screw rod (48) is installed inside the regulating box (4). The two ends of the screw rod (48) are respectively connected to the parallel plate (44) and the partition (45). The screw rod (48) is threadedly connected to the conical plate (41). A filter hole is opened on the partition (45), and a discharge port (49) is installed on the side wall of the regulating box (4) located above the partition (45). The parallel plate (44) covers no more than 80% of the top area of ​​each regulating box (4), and the top of the regulating box (4) is open.

5. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, The regulating box 2 (5) includes a middle part (53), and a dosing part (51) and a storage part (52) are respectively provided on both sides of the middle part (53), and both the dosing part (51) and the storage part (52) are provided with inclined surfaces; A high-level inlet pipe (54) and a low-level return pipe (55) are provided between the intermediate part (53) and the dosing part (51); a notch is provided between the intermediate part (53) and the storage part (52); A stirring rod (56) is installed inside the middle part (53), and a stirring motor (57) is installed on the top. The stirring motor (57) drives the stirring rod (56) to rotate.

6. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, An overflow trough is provided above the side of the anaerobic zone (61), the anoxic zone (62) and the aerobic zone (63), and an overflow pipe (64) is provided at the overflow trough. The outlet of the overflow pipe (64) is located at the bottom of the next zone and is used for sewage flow and balance. Polyphosphate-accumulating bacteria are installed in the anaerobic zone (61) for phosphorus removal from wastewater; denitrifying bacteria are installed in the anoxic zone (62) for nitrogen removal from wastewater. An aeration disc (65) is provided in the middle of the aerobic zone (63), and a discharge hopper (66) is provided at the bottom of the aeration disc (65).

7. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, The deep cleaning tank (7) includes a cleaning motor (72), the output end of which is inserted into the deep cleaning tank (7) and a cleaning stirring blade (73) is installed; an inclined pipe (74) is also installed in the deep cleaning tank (7), with a serrated bottom and a mud discharge pipe (75) at the top.

8. The wastewater recycling system for industrial heritage areas according to claim 1, characterized in that, The desulfurization tower (9) is equipped with a guide plate (93) and a wet spray pipe (94), with an air inlet pipe (95) installed at the bottom and an air outlet pipe (96) installed at the top; the air inlet pipe (95) is supplied with biogas delivered by the air pump (92); a contact plate (97) is installed in the desulfurization tower (9) above the air inlet pipe (95), the outer side of the contact plate (97) is fixed to the inner wall of the desulfurization tower (9), and the outer diameter is equal to the inner diameter of the desulfurization tower (9); a mixture of sodium carbonate and desulfurization catalyst is sprayed downward from the wet spray pipe (94); Air holes are opened on the contact plate (97), and a guide cylinder (98) is installed at the bottom of each group of air holes. The guide cylinder (98) extends the contact area and time between biogas and mixed liquid. The bottom of the multiple sets of guide cylinders (98) is provided with inclined blades (99); the outer side of the contact plate (97) is provided with a slewing bearing and is rotatably connected to the inner wall of the desulfurization tower (9).

9. A wastewater recycling system for industrial heritage areas according to claim 8, characterized in that, The guide plate (93) is an inclined plate, and its length is less than the outer diameter of the inner wall of the desulfurization tower (9); A water filter plate (910) is installed between the air intake pipe (95) and the contact plate (97). The water filter plate (910) is provided with multiple sets of water permeable holes, and the water permeable holes are in the shape of a frustum with a high center and a low outer edge.

10. A treatment method for a wastewater recycling system in an industrial heritage area, characterized in that, Includes the following steps: Step 1: Wastewater is discharged into the filter box (1) through the feed opening and the impact buffer plate (13) reduces the flow rate; then it passes through the first filter plate (14) to the bottom of the push belt (16), and the push belt (16) drives the push plate (17) to move under the operation of the push motor on one side; the push plate (17) pushes the suspended matter between the first filter plate (14) and the second filter plate (15) to the side discharge section (11) on one side. Then, through the filter plate 2 (15), the discharge motor (111) drives the synchronous belt (113) through the synchronous wheel (112) to make the two sets of discharge rods (18) rotate synchronously. Combined with the two sets of spiral blades (19) set in opposite directions, the material is discharged to the side discharge section (11) on both sides. Step 2: Wastewater is introduced into regulating tank 1 (4) through pipe (2) and transfer pump (3); the wastewater settles on the conical plate (41) and adheres to the activated carbon ring (43); the water passage allows some wastewater to enter the bottom of the conical plate (41); When it is necessary to personally handle the conical plate (41), the rotary motor (47) drives the screw rod (48) to rotate, causing the conical plate (41) to rise. The conical plate (41) moves to the open position to replace the activated carbon ring (43) and clean the surface sediment sludge. Step 3: The sewage discharged from the first regulating tank (4) in step 2 is introduced into the regulating tank (5) through the pipe (2) and the delivery pump (3); when at home, add the medicine (51), open the inlet pipe (54), and the high-level water flows into the dosing section (51) to form a mixed medicine solution. Then, by opening the return pipe (55), it is mixed with the sewage in the middle section (53) and combined with the stirring rod (56) to mix the liquid; then it is discharged through the middle section (53); Step 4: In the composite tank (6), polyphosphate-accumulating bacteria are first treated in the anaerobic zone (61); then, denitrifying bacteria are treated in the anoxic zone (62) through the overflow pipe (64); and then aeration is carried out in the aerobic zone (63) through the overflow pipe (64). Polyphosphate-accumulating bacteria are also stored in the aerobic zone (63). Each zone reacts for at least 6 hours. At room temperature, the pH value of the wastewater is between 6.5 and 7.

5. Step 5: Add PAC / PFS coagulant to the deep cleaning tank (7) and then pass it through the inclined tube sedimentation zone 71 for separation and sedimentation after stirring. Step 6: The disinfection tower (8) performs subsequent disinfection on the wastewater from step 5 to meet the composite reclaimed water standard.

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