Anaerobic reactor for high concentration papermaking wastewater treatment

Abstract

The utility model relates to papermaking sewage treatment field especially, more particularly to a kind of anaerobic reactor for high concentration papermaking sewage treatment.The anaerobic reactor for high concentration papermaking sewage treatment including reaction tank body, gas-liquid separator, air chamber, telescopic cylinder, telescopic component and scraper, the inside of reaction tank body is equipped with two groups of three-phase separator and is equipped with water distributor in bottom, the top of reaction tank body is equipped with gas-liquid separator.The anaerobic reactor for high concentration papermaking sewage treatment provided by the utility model is designed by telescopic component and pressure sensor, the real-time dynamic adjustment of air chamber volume is realized, effectively solve the problem that traditional fixed volume air chamber cannot be adapted to biogas production fluctuation;This dynamic adjustment mechanism can control the air pressure in air chamber in the best range, avoid the leakage of sealing element caused by air pressure sudden rise, and the air backflow caused by air pressure sudden drop, significantly improve the stability of anaerobic environment, improve biogas collection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of papermaking wastewater treatment, and in particular to an anaerobic reactor for treating high-concentration papermaking wastewater. Background Technology

[0002] In the field of high-concentration papermaking wastewater treatment, anaerobic reactors are the core treatment equipment, and their operational stability and treatment efficiency directly affect the overall wastewater treatment effect. However, traditional anaerobic reactors have many technical limitations in practical applications, making it difficult to meet the complex treatment needs of high-concentration papermaking wastewater. Traditional anaerobic reactors typically have a fixed-volume top gas chamber. However, during the anaerobic degradation of high-concentration paper mill wastewater, biogas production fluctuates significantly due to factors such as influent load, temperature, and pH. Fixed gas chambers cannot accommodate these fluctuations. When gas production surges, the gas pressure inside the chamber rises rapidly. This not only causes leaks in the reactor seals due to prolonged exposure to excessive pressure but also leads to a significant decrease in biogas collection efficiency, wasting energy and potentially posing safety hazards due to biogas leaks. Conversely, during periods of low gas production, the gas pressure inside the chamber drops, making it highly susceptible to air backflow. This disrupts the strict anaerobic conditions required for an anaerobic environment, severely inhibiting the activity of methanogens and other anaerobic microorganisms, resulting in a substantial reduction in wastewater treatment efficiency.

[0003] Therefore, it is necessary to provide a new anaerobic reactor for the treatment of high-concentration papermaking wastewater to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an anaerobic reactor for treating high-concentration papermaking wastewater.

[0005] The anaerobic reactor for treating high-concentration papermaking wastewater provided by this utility model includes: a reaction tank body, a gas-liquid separator, a gas chamber, a telescopic cylinder, a telescopic assembly, and scrapers. The reaction tank body is equipped with two sets of three-phase separators and a water distributor at the bottom. The gas-liquid separator is installed at the top of the reaction tank body, and the top of the gas-liquid separator is connected to the gas chamber. A telescopic cylinder is slidably installed on the outer wall of the gas chamber. A telescopic assembly is installed between the gas chamber and the telescopic cylinder. The telescopic assembly drives the telescopic cylinder to rise and fall to adjust the volume of the gas chamber. Scrapers for scraping off particulate matter are symmetrically installed on the inner wall of the gas chamber.

[0006] Preferably, the telescopic assembly includes: a motor, a driving pulley and a driven pulley. A mounting frame is fixedly connected to the top of the telescopic cylinder. A motor is fixedly connected inside the mounting frame. A driving pulley is fixedly connected to the output end of the motor. A square rod is rotatably connected to one end of the mounting frame. A driven pulley is fixedly connected to the top of the square rod. The driving pulley and the driven pulley are connected by a belt drive.

[0007] Preferably, the top of the gas-liquid separator is rotatably connected to a threaded rod, the inside of which is provided with a square groove that matches the square rod. The square rod is placed inside the square groove and is slidably connected to its inner wall. The outer wall of the threaded rod is threadedly connected to a slider, and the side wall of the slider is fixedly connected to the telescopic cylinder.

[0008] Preferably, a key shaft is fixedly connected to the output end of the motor, and a key sleeve is fixedly connected between the two scrapers via a connecting rod. The key shaft is placed inside the key sleeve and is slidably connected to its inner wall.

[0009] Preferably, a pressure sensor is fixedly connected to the inner wall of the gas-liquid separator.

[0010] Preferably, the top of the telescopic cylinder is connected to a conveying pipe, a collecting tank is placed on one side of the reaction vessel body, the top of the collecting tank is connected to a pipe, and the bottom end of the conveying pipe is placed inside the pipe and slidably connected to its inner wall.

[0011] Preferably, sealing gaskets are installed at equal intervals on the inner wall of the telescopic cylinder.

[0012] Compared with related technologies, the anaerobic reactor for treating high-concentration papermaking wastewater provided by this utility model has the following beneficial effects: By designing telescopic components and pressure sensors, the gas chamber volume can be dynamically adjusted in real time, effectively solving the problem that traditional fixed-volume gas chambers cannot adapt to fluctuations in biogas production. This dynamic adjustment mechanism can stably control the gas pressure in the gas chamber within the optimal range, avoiding leakage of seals due to sudden increases in gas pressure and backflow of air caused by sudden drops in gas pressure, significantly improving the stability of the anaerobic environment and increasing biogas collection efficiency. The key shaft at the motor output end and the key sleeve of the scraper assembly are matched to achieve synchronous operation of the scraper and the telescopic adjustment. During the lifting and lowering of the telescopic cylinder, the scraper rotates with the key shaft and makes a circular motion along the inner wall of the gas chamber, which can efficiently scrape off the attached fiber scum, microbial metabolic residues and other impurities. The scraped scum flows back to the bottom of the reactor body by gravity and participates in the anaerobic reaction again. This not only avoids the problem of scum layer blocking biogas escape in traditional reactors, but also reduces local corrosion caused by scum accumulation. At the same time, there is no need for regular shutdown for manual cleaning, which improves the equipment operating rate. Attached Figure Description

[0013] Figure 1 A schematic diagram of the anaerobic reactor for treating high-concentration papermaking wastewater provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the reaction vessel body. Figure 3 for Figure 2 The diagram shown is a structural schematic of a gas-liquid separator. Figure 4 for Figure 3 The diagram shows the structure at point A.

[0014] Labels in the diagram: 1. Reactor body; 2. Three-phase separator; 3. Water distributor; 4. Gas-liquid separator; 5. Gas chamber; 6. Telescopic cylinder; 7. Scraper; 8. Motor; 9. Driving pulley; 10. Driven pulley; 11. Square rod; 12. Threaded rod; 13. Square groove; 14. Slider; 15. Key shaft; 16. Key sleeve; 17. Pressure sensor; 18. Delivery pipe; 19. Collection tank; 20. Sealing gasket. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] Please see Figures 1 to 4An anaerobic reactor for treating high-concentration papermaking wastewater includes: a reactor body 1, a gas-liquid separator 4, a gas chamber 5, a telescopic cylinder 6, a telescopic assembly, and scrapers 7. The reactor body 1 has two sets of three-phase separators 2 installed inside and a water distributor 3 installed at the bottom. The gas-liquid separator 4 is installed at the top of the reactor body 1, and the top of the gas-liquid separator 4 is connected to the gas chamber 5. The telescopic cylinder 6 is slidably installed on the outer wall of the gas chamber 5. A telescopic assembly is installed between the gas chamber 5 and the telescopic cylinder 6, driving the telescopic cylinder 6 to rise and fall to adjust the volume of the gas chamber 5. Scrapers 7 for scraping off particulate matter are symmetrically installed on the inner wall of the gas chamber 5. The telescopic assembly includes: a motor 8, a driving pulley 9, and a driven pulley 10. A mounting frame is fixedly connected to the top of the telescopic cylinder 6, and the motor 8 is fixedly connected inside the mounting frame. The output end of the motor 8 is fixedly connected to the driving pulley 9, and a square rod 11 is rotatably connected to one end of the mounting frame. A driven pulley 10 is fixedly connected to the top of the square rod 11. The driving pulley 9 and the driven pulley 10 are connected by a belt drive. A threaded rod 12 is rotatably connected to the top of the gas-liquid separator 4. A square groove 13 matching the square rod 11 is opened inside the threaded rod 12. The square rod 11 is placed inside the square groove 13 and is slidably connected to its inner wall. A slider 14 is threadedly connected to the outer wall of the threaded rod 12. The side wall of the slider 14 is fixedly connected to the telescopic cylinder 6. A key shaft 15 is fixedly connected to the output end of the motor 8. A key sleeve 16 is fixedly connected between the two scrapers 7 through a connecting rod. The key shaft 15 is placed inside the key sleeve 16 and is slidably connected to its inner wall. A pressure sensor 17 is fixedly connected to the inner wall of the gas-liquid separator 4. A conveying pipe 18 is connected to the top of the telescopic cylinder 6. A collection tank 19 is placed on one side of the reaction tank body 1. A pipe is connected to the top of the collection tank 19. The bottom end of the conveying pipe 18 is placed inside the pipe and is slidably connected to its inner wall.

[0018] It should be noted that the mounting frame is equipped with a protective cover to protect the pulley from rotating. The scraper 7 is in close contact with the inner wall of the air chamber 5, and both sides of it are designed as scrapers. Whether the motor 8 rotates forward or in reverse, it can scrape off the particles attached to the inner wall of the air chamber 5.

[0019] The working principle of the anaerobic reactor for treating high-concentration papermaking wastewater provided by this utility model is as follows: The high-concentration papermaking wastewater to be treated enters the reactor through the inlet at the bottom of the reactor body 1, and first flows through the water distributor 3 installed at the bottom. The water distributor 3, through a preset water flow distribution structure, evenly disperses the wastewater to the bottom area of ​​the reactor body 1, allowing the wastewater to fully contact the anaerobic sludge inside the tank. As the wastewater flows upward in the reactor body 1, it passes through two sets of three-phase separators 2 in sequence: the first set of three-phase separators 2 initially separates some solid particles and air bubbles in the wastewater, and the second set of three-phase separators 2 further enhances the separation effect of solid, liquid, and gas phases, ensuring that the content of solid impurities in the mixed liquid entering the upper area is significantly reduced, creating a stable environment for subsequent biogas generation. During this process, organic matter such as lignin and cellulose in the wastewater is gradually degraded under the metabolic action of anaerobic microorganisms, producing biogas. After being processed by two sets of three-phase separators 2, the mixture enters the gas-liquid separator 4 at the top of the reaction tank body 1. The gas-liquid separator 4 completely separates the biogas and liquid in the mixture through the principle of centrifugal force. The separated biogas enters the gas chamber 5 through the connecting port at the top of the gas-liquid separator 4 for temporary storage, while the separated liquid flows back into the reaction tank body 1 to continue to participate in the reaction. At this time, the volume of the gas chamber 5 is determined by the initial position of the telescopic cylinder 6. The sealing gasket 20 on the inner wall of the telescopic cylinder 6 is tightly fitted with the outer wall of the gas chamber 5 to ensure that the gas chamber 5 is in a sealed state and prevent biogas leakage. When the pressure sensor 17 on the inner wall of the gas-liquid separator 4 detects that the air pressure in the gas chamber 5 exceeds the preset value, the control system triggers the telescopic assembly to start. The motor 8 in the mounting bracket at the top of the telescopic cylinder 6 starts to run in the forward direction. The output end of the motor 8 drives the drive pulley 9 to rotate. The drive pulley 9 drives the driven pulley 10 to rotate synchronously through the belt. The driven pulley 10 is fixed to the top of the square rod 11. Therefore, the square rod 11 rotates together with the driven pulley 10. The square rod 11 is embedded in the square groove 13 inside the threaded rod 12. The two achieve torque transmission through the cooperation of the square structure, so that the threaded rod 12 rotates synchronously with the square rod 11. The slider 14, which is threaded to the outer wall of the threaded rod 12, moves upward along the axial direction of the threaded rod 12 due to the threaded transmission. Since the slider 14 is fixedly connected to the telescopic cylinder 6, the telescopic cylinder 6 slides upward together with the slider 14. During the process of the telescopic cylinder 6 moving upward along the outer wall of the gas chamber 5, the effective volume of the gas chamber 5 gradually increases, thereby reducing the internal air pressure until the pressure sensor 17 detects that the air pressure has dropped to the preset range, and the motor 8 stops running. During the operation of motor 8, the key shaft 15 fixedly connected to its output end rotates synchronously. The key shaft 15 is embedded in the key sleeve 16 on the connecting rod between the two scrapers 7. The key connection structure drives the key sleeve 16 to rotate. The key sleeve 16 drives the two symmetrically installed scrapers 7 to make a circular motion along the inner wall of the gas chamber 5 through the connecting rod, scraping off the scum attached to the inner wall of the gas chamber 5. The scraped scum falls under the action of gravity and falls into the gas-liquid separator 4 through the communication port between the gas-liquid separator 4 and the gas chamber 5. Finally, it flows back to the bottom of the reaction tank body 1 and participates in the anaerobic reaction again. While motor 8 moves upward with telescopic cylinder 6, key shaft 15 slides synchronously inside key sleeve 16. When biogas production decreases and the pressure sensor 17 inside the gas-liquid separator 4 detects that the gas pressure in the gas chamber 5 is lower than the preset value, the control system controls the motor 8 to run in reverse. The motor 8 drives the square rod 11 to rotate in reverse through the driving pulley 9, belt, and driven pulley 10, which in turn causes the threaded rod 12 to rotate in reverse. Under the action of the threaded transmission, the slider 14 moves downward along the axial direction of the threaded rod 12, which drives the telescopic cylinder 6 to slide downward along the outer wall of the gas chamber 5. The effective volume of the gas chamber 5 gradually decreases. As the volume decreases, the gas pressure in the gas chamber 5 gradually increases until the pressure sensor 17 detects that the gas pressure has risen back to the preset range. The motor 8 then stops running to avoid air backflow due to low gas pressure. During the lifting and lowering of the telescopic cylinder 6, the conveying pipe 18 connected to its top moves synchronously with the telescopic cylinder 6. The bottom end of the conveying pipe 18 is always embedded in the pipe at the top of the collection tank 19. The continuous biogas conveying channel is ensured through sliding cooperation. The biogas in the gas chamber 5 flows continuously into the collection tank 19 for storage through the conveying pipe 18, realizing the recycling of biogas. The sealing gasket 20 always maintains a sealed contact with the outer wall of the gas chamber 5 during the sliding of the telescopic cylinder 6 to prevent biogas leakage during the adjustment process and ensure the airtightness of the system.

[0020] All standard parts used above can be purchased from the market. Irregular parts can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology. In addition, the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An anaerobic reactor for treating high-concentration papermaking wastewater, characterized in that, include: The reaction vessel body (1) has two sets of three-phase separators (2) installed inside and a water distributor (3) installed at the bottom. Gas-liquid separator (4) is installed on the top of the reaction vessel body (1). Gas chamber (5), the top of gas-liquid separator (4) is connected to gas chamber (5); Telescopic cylinder (6), the outer wall of the air chamber (5) is slidably installed with the telescopic cylinder (6); A telescopic assembly is installed between the air chamber (5) and the telescopic cylinder (6). The telescopic assembly drives the telescopic cylinder (6) to rise and fall to adjust the volume of the air chamber (5). Scraper (7) is symmetrically installed on the inner wall of the air chamber (5) for scraping off particulate matter.

2. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 1, characterized in that, The telescopic assembly includes a motor (8), a drive pulley (9), and a driven pulley (10). A mounting frame is fixedly connected to the top of the telescopic cylinder (6). The motor (8) is fixedly connected inside the mounting frame. The drive pulley (9) is fixedly connected to the output end of the motor (8). A square rod (11) is rotatably connected to one end of the mounting frame. The driven pulley (10) is fixedly connected to the top of the square rod (11). The drive pulley (9) and the driven pulley (10) are connected by belt drive.

3. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 2, characterized in that, The top of the gas-liquid separator (4) is rotatably connected to a threaded rod (12). The inside of the threaded rod (12) is provided with a square groove (13) that matches the square rod (11). The square rod (11) is placed inside the square groove (13) and is slidably connected to its inner wall. The outer wall of the threaded rod (12) is threadedly connected to a slider (14). The side wall of the slider (14) is fixedly connected to the telescopic cylinder (6).

4. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 2, characterized in that, The output end of the motor (8) is fixedly connected to a key shaft (15), and the two scrapers (7) are fixedly connected to a key sleeve (16) through a connecting rod. The key shaft (15) is placed inside the key sleeve (16) and is slidably connected to its inner wall.

5. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 1, characterized in that, A pressure sensor (17) is fixedly connected to the inner wall of the gas-liquid separator (4).

6. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 1, characterized in that, The top of the telescopic cylinder (6) is connected to the conveying pipe (18), and a collection tank (19) is placed on one side of the reaction vessel body (1). The top of the collection tank (19) is connected to the pipe, and the bottom end of the conveying pipe (18) is placed inside the pipe and is slidably connected to its inner wall.

7. The anaerobic reactor for treating high-concentration papermaking wastewater according to claim 1, characterized in that, The inner wall of the telescopic cylinder (6) is equipped with sealing gaskets (20) at equal intervals.

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