A two-step three-phase anaerobic separation device
By adopting a two-step three-phase anaerobic separation device in the anaerobic reactor, the combined structure of the partition plate, cone deflector, return pipe and water collector, the problems of mutual interference between gas, liquid and solid in the three-phase separator and the problem of lax sealing are solved, efficient three-phase separation and sludge reflow are achieved, and treatment efficiency and stability are improved.
Patent Information
- Application Number
- CN202421422784.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-21
AI Technical Summary
In existing anaerobic reactors, the three-phase separator has problems such as gas, liquid and solid interfering with each other and affecting separation, poor sealing and leaking, and sludge loss.
A two-step three-phase anaerobic separation device is adopted, including a partition plate, a cone deflector, a return pipe and a water collector. A one-step separation zone is formed with the anaerobic reactor wall through the partition plate, and a two-step separation zone is formed through the cone deflector and a return pipe to achieve efficient separation of biogas, wastewater and sludge.
It improves the efficiency of three-phase separation, reduces the loss of sludge, solves the problems of lax sealing and mutual interference of the three-phase separator, is convenient and simple to install, and saves time.
Smart Images
Figure CN222715184U_ABST
Abstract
Description
[Technical field]
[0001] The utility model relates to a gas, liquid and solid three-phase separation technology of an anaerobic reactor for high-concentration organic wastewater, in particular to a two-step three-phase anaerobic separation device. [Background technology]
[0002] Anaerobic reactors are usually used to degrade and remove organic matter in high-concentration organic wastewater. The mechanism is to use anaerobic microorganisms to contact and adsorb organic matter in wastewater and decompose it into biogas, so as to achieve an effective device for treating organic matter in wastewater. The treatment efficiency and stability of anaerobic reactors involve key core components - gas, solid and liquid three-phase separators, which mainly separate biogas and sludge produced by anaerobic reactions efficiently to ensure that sludge is not lost and anaerobic sludge is retained in the anaerobic reactor.
[0003] At present, anaerobic reactors usually use a one-layer or two-layer roof herringbone synchronous three-phase separator, which has a complex structure and high construction and installation requirements. The material of the three-phase separator is usually metal (carbon steel, stainless steel) or organic plastic (PP, PVC, fiberglass). Due to the different materials and shapes of the three-phase separator and the anaerobic reactor tank (tank), the three-phase separator and the wall of the anaerobic reactor are not directly welded, but welded baffles or stacked on the anaerobic reactor support beam. Due to the small operating space on the support beam, welding or stacking baffles is inconvenient, and the required working hours are long. At the same time, under this operating space, it is difficult to fully weld the welded baffles, and there are many gaps in the stacked baffles. In addition, when using a sealing plate to fix multiple three-phase separators, the alignment between the three-phase separators is inconvenient, and it is very easy to have an uneven bottom of the entire three-phase separator, thereby causing biogas leakage. Therefore, the anaerobic reactors currently in use generally have problems with poor sealing of the three-phase separator and air leakage, which leads to sludge running out of the effluent of the anaerobic reactor. The loss of sludge affects the anaerobic treatment effect. [Contents of the utility model]
[0004] The utility model provides a two-step three-phase anaerobic separation device to solve the problems of mutual interference and influence on separation when gas, liquid and solid are separated in the three-phase separator in the prior art, as well as air leakage and sludge loss due to poor sealing.
[0005] The utility model is realized by the following technical scheme, and provides a two-step three-phase anaerobic separation device, which is arranged flush with the top of the anaerobic reactor, immersed in water and located in the center of the anaerobic reactor, including: a baffle, the baffle includes an upper baffle and a lower baffle, the upper baffle is cylindrical, the bottom side wall of the upper baffle is evenly provided with water distribution holes, the lower baffle is cone-shaped, the upper baffle and the lower baffle are coaxially sealed and connected to form a two-step separation zone, and the baffle and the anaerobic reactor wall form a one-step separation zone; a frustum guide plate, the frustum guide plate is arranged on the outer wall of the upper baffle, the frustum guide plate is arranged on the outer wall of the upper baffle, and the frustum guide plate is arranged on the outer wall of the upper baffle. The lower edge of the guide plate is connected below the water distribution hole, an angle is left between the upper edge of the frustum guide plate and the upper partition, support pipes are evenly arranged on the upper edge of the frustum guide plate, one end of the support pipe is connected to the frustum guide plate, and the other end is connected to the upper partition; a return pipe, the return pipe is arranged at the axial center of the partition, the diameter of the return pipe is adapted to the inner diameter of the bottom outlet of the cone bucket of the lower partition, and a return hole is arranged at the bottom of the return pipe near the bottom outlet of the lower partition; a water collecting trough, the water collecting trough is connected to the upper part of the return pipe, the water collecting trough is connected to a drain pipe, and the drain pipe passes through the upper partition and the wall of the anaerobic reactor to be connected to the outside.
[0006] Furthermore, a sealing plate is added to the top of the anaerobic reactor. The sealing plate is in a circular shape. The sealing plate, the upper edge of the anaerobic reactor wall and the upper edge of the upper partition are connected to form an air chamber. A biogas discharge pipe, a pressure gauge and a safety valve are arranged on the sealing plate.
[0007] Furthermore, three steel slide plates are evenly arranged on the inner wall of the reflux pipe, and the length of the tempered plate is the same as that of the reflux pipe.
[0008] Furthermore, a circular support plate is provided at the upper end of the reflux pipe, a bracket is mounted on the support plate, the bracket is in a well shape, and its end is fixedly connected to the upper edge of the upper partition, and a movable cover is provided on the bracket.
[0009] Furthermore, a water outlet weir is arranged on the water collecting trough, and the water outlet weir adopts a triangular weir mouth.
[0010] Furthermore, the angle between the upper edge of the cone guide plate and the upper partition is greater than 10 degrees and less than 15 degrees.
[0011] Furthermore, the angle of the lower partition is greater than 50 degrees and less than 60 degrees.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] (1) The utility model does not need to set beams and baffles on the inner wall of the anaerobic reactor and underwater, does not require underwater welding or glue sealing installation, does not leak, and the two-step three-phase anaerobic separation device can be directly hoisted from the top of the anaerobic reactor and placed and fixed, which is convenient and simple to install and saves time;
[0014] (2) A two-step three-phase separation structure is adopted. By setting a baffle, a sealing plate and a guide plate in conjunction with the anaerobic reactor wall, an air chamber, a first-step separation zone and a second-step separation zone are formed, so that the biogas and wastewater under the anaerobic reactor carry the sludge and rise together. The biogas diffuses into the air chamber, and the wastewater and sludge enter the second-step separation zone through the underwater guide plate for second-step separation. The separated sludge is discharged through the reflux pipe, and the supernatant is discharged through the sump. The separation efficiency of the two-step three-phase anaerobic separation device is improved and the loss of sludge is reduced. This solves the problem that the existing conventional synchronous three-phase separator interferes with each other during the separation of gas (biogas), liquid (wastewater) and solid (sludge), affecting the separation. At the same time, it solves the problem of poor sealing and air leakage and sludge loss in the conventional three-phase separator.
Brief Description of the Drawings
[0015] Figure 1 This is a schematic structural diagram of a two-step three-phase anaerobic separation device of the utility model;
[0016] Figure 2 It is a top view of a two-step three-phase anaerobic separation device of the utility model;
[0017] Figure 3 It is a cross-sectional view of a two-step three-phase anaerobic separation device of the utility model;
[0018] In the attached drawings, 1, partition; 11, upper partition; 12, lower partition; 13, cone guide plate; 14, water distribution hole; 2, anaerobic reactor wall; 21, sealing plate; 3, one-step separation zone; 31, air chamber; 32, two-step separation zone; 4, reflux pipe; 41, reflux hole; 42, reflux port; 5, water collecting trough; 51, water outlet weir; 52, water outlet; 6, drain pipe; 7, bracket; 8, movable cover plate; 9, support pipe. [Specific implementation method]
[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings.
[0020] See also Figure 1-Figure 3 The utility model provides a two-step three-phase anaerobic separation device, which is suspended and fixedly installed on the top of the anaerobic reactor, immersed in water, and located at the center of the anaerobic reactor, and the two-step three-phase anaerobic separation device is flush with the top of the anaerobic reactor.
[0021] A two-step three-phase anaerobic separation device comprises a partition plate 1, a frustum guide plate 13, a return pipe 4, a drain pipe 6 and a water collection tank 5;
[0022] The partition 1 includes an upper partition 11 and a lower partition 12, wherein the upper partition 11 is cylindrical, and the bottom side wall of the upper partition 11 is evenly provided with water distribution holes 14, and the lower partition 12 is cone-shaped, and the upper partition 11 and the lower partition 12 are coaxially welded and sealed to form a two-step separation zone 32, and the partition 1 and the anaerobic reactor wall 2 form a one-step separation zone 3, i.e., a one-step gas and liquid-solid separation zone. In this embodiment, the water distribution holes 14 are rectangular holes with a width of 50 mm and a length of 200 mm, and the hole spacing is 200 mm.
[0023] The frustum guide plate 13 is arranged on the outer wall of the upper partition plate 11, and the lower edge of the frustum guide plate 13 is welded and connected below the water distribution hole 14. The upper edge of the frustum guide plate 13 and the upper partition plate 11 leave an angle, and the angle is set to further separate the gas from the liquid and solid once, and at the same time control the flow rate of the liquid-solid mixed liquid into the second-step separation area 32. Support pipes 9 are evenly arranged on the upper edge of the frustum guide plate 13 to strengthen the support of the frustum guide plate 13 to prevent deformation. One end of the support pipe 9 is connected to the frustum guide plate 13, and the other end is welded and connected to the upper partition plate 11. In this embodiment, the support pipe 9 adopts a square steel bracket.
[0024] The reflux pipe 4 is arranged at the axial center of the partition 1, and the diameter of the reflux pipe 4 is adapted to the inner diameter of the cone bucket outlet of the lower partition 12, and the reflux pipe 4 is welded and sealed with the lower partition 12 by the same center. The bottom of the reflux pipe 4 is close to the cone bucket outlet of the lower partition 12, and reflux holes 41 are opened along the four sides of the pipe wall. The reflux pipe 4 extends out from the cone bucket outlet of the lower partition 12, so that the sludge after the two-step liquid-solid separation in the two-step separation area 32 is refluxed from the reflux holes 41 and the reflux holes 42 to the bottom of the anaerobic reactor. In this embodiment, the reflux holes 41 are set as rectangular holes with a width of 20 mm and a length of 200 mm, and the hole spacing is 30 mm, which can ensure that the internal reflux can pass when the internal reflux volume is maximum.
[0025] The water collecting tank 5 is arranged on the upper part of the reflux pipe 4, and is connected to a drainage pipe 6. The drainage pipe 6 passes through the upper partition plate 11 and the anaerobic reactor wall 2 and is provided with a water outlet 52 to be connected to the outside for discharging the supernatant.
[0026] Specifically, the top of the anaerobic reactor is covered with a sealing plate 21, which is in a circular shape. The sealing plate 21, the upper edge of the anaerobic reactor wall 2 and the upper edge of the upper partition 11 are welded or bolted to form a gas chamber 31. By setting the gas chamber 31, there is no need to separately equip a gas-liquid separation tank, and mud and water can be refluxed. The sealing plate 21 is also provided with a biogas discharge pipe, a pressure gauge and a safety valve. In this embodiment, the gas chamber 31 is between the water surface of the anaerobic reactor and the top sealing plate 21, forming a space of 50 to 80 cm in height for collecting biogas.
[0027] Specifically, three steel slide plates with a width of 50 mm and a length equal to the length of the return pipe 4 are provided on the inner wall of the return pipe 4, which are evenly welded at an angle of 120 degrees to the inner wall of the return pipe 4. The steel slide plates are mainly used to connect and align with the return pipe 4 so as to play a positioning role when the return pipe 4 is installed or hoisted for maintenance.
[0028] Specifically, a circular support plate is welded to the upper end of the return pipe 4, and a bracket 7 is mounted on the support plate for fixing. The bracket 7 is in a criss-cross shape and consists of four square steels. The end of the bracket 7 is aligned with the upper partition 11, and the upper edge of the bracket 7 is horizontal with the upper edge of the upper partition 11, and then welded and fixed. A movable cover plate 8 is provided on the upper edge of the bracket 7 as a pedestrian inspection passage.
[0029] Specifically, a water outlet weir 51 is also provided on the water collecting trough 5. In this embodiment, the water collecting trough 5 is disc-shaped and adopts a continuous triangular weir with a weir width of 100 mm and a weir depth of 100 mm. The trough depth is 250 mm. The water collecting trough 5 and the return pipe 4 are sealed by concentric welding.
[0030] Specifically, the angle between the upper edge of the cone guide plate 13 and the upper partition plate 11 is greater than 10 degrees and less than 15 degrees. It is used to control the formation of a ring with a certain area as a channel for liquid and solid to enter the second-step separation area 32, to prevent the influence of too low or too high flow rate on the water distribution of the second-step separation area 32 due to too large or too small area.
[0031] Specifically, the angle of the lower partition 12 is greater than 50 degrees and less than 60 degrees, which can effectively prevent the sludge after the secondary liquid-solid separation from being deposited on the wall and unable to slide back, causing the anaerobic reactor to produce biogas after the sludge is accumulated.
[0032] In this embodiment, the two-step three-phase anaerobic separation device can be assembled from 1-2 mm thick 304 stainless steel plates or assembled from 304 stainless steel plates + HDPE membranes. The use of 304 stainless steel and HPDE materials can enhance the corrosion resistance of the two-step three-phase anaerobic separation device and increase the service life of the device.
[0033] The hydraulic load of the two-step three-phase anaerobic separation device is 0.8~1.2m 3 / m 2 .h, weir load of water collection tank 5 4~6m 3 / mh, solid-liquid separation time is 1.5 to 2.5 hours, reflux ratio is 1 to 3 times, and the height of the gas chamber 31 of the one-step separation zone 3 is 0.5 to 0.8 m.
[0034] The two-step three-phase anaerobic separation device in this embodiment can be configured into corresponding module devices of different forms and sizes according to the form and size of the anaerobic reactor, and the module device can be composed of one or more modules.
[0035] Working principle:
[0036] The two-step three-phase anaerobic separation device is suspended and fixedly installed on the top of the anaerobic reactor, immersed in water, and located at the center of the anaerobic reactor. The two-step three-phase anaerobic separation device is flush with the top of the anaerobic reactor. A first-step gas and liquid-solid separation zone is formed between the outer side of the baffle plate 1 of the two-step three-phase anaerobic separation device and the wall 2 of the anaerobic reactor. The rising biogas and wastewater from the lower part of the anaerobic reactor carry the sludge and rise together to enter the first-step separation zone 3 where the flow cross-section suddenly decreases. During the rising process of the biogas, large bubbles are synthesized and finally burst, and diffuse from the water to the closed air chamber 31 in the upper space of the first-step separation zone 3, while the wastewater and sludge are drained from the underwater frustum guide plate 13 into the second-step separation zone 32; the second-step separation zone 32 formed on the inner side of the baffle plate 1 of the two-step three-phase anaerobic separation device performs a two-step liquid-solid separation. After separation, the sludge flows back to the bottom of the anaerobic reactor from the reflux holes 41 and the reflux port 42 at the bottom of the two-step three-phase anaerobic separation device, and the supernatant flows into the sump 5 from above and is discharged through the drain pipe 6.
Claims
1. A two-step three-phase anaerobic separation device, which is arranged flush with the top of the anaerobic reactor, immersed in water and located in the center of the anaerobic reactor, characterized in that: include: A partition (1), the partition (1) comprising an upper partition (11) and a lower partition (12), the upper partition (11) being cylindrical, the bottom side wall of the upper partition (11) being evenly provided with water distribution holes (14), the lower partition (12) being cone-shaped, the upper partition (11) and the lower partition (12) being coaxially sealed and connected to form a two-step separation zone (32), the partition (1) and the anaerobic reactor wall (2) forming a one-step separation zone (3); A frustum guide plate (13), the frustum guide plate (13) being arranged on the outer wall of the upper partition plate (11), the lower edge of the frustum guide plate (13) being connected below the water distribution hole (14), the upper edge of the frustum guide plate (13) and the upper partition plate (11) leaving an angle, the upper edge of the frustum guide plate (13) being evenly provided with support pipes (9), one end of the support pipe (9) being connected to the frustum guide plate (13), and the other end being connected to the upper partition plate (11); A return pipe (4), the return pipe (4) being arranged at the axial center of the partition (1), the diameter of the return pipe (4) being adapted to the inner diameter of the bottom outlet of the cone hopper of the lower partition (12), and a return hole (41) being arranged at the bottom of the return pipe (4) near the bottom outlet of the lower partition (12); A water collecting tank (5), the water collecting tank (5) is connected to the upper part of the return pipe (4), the water collecting tank (5) is connected to a drainage pipe (6), and the drainage pipe (6) passes through the upper partition plate (11) and the anaerobic reactor wall (2) to communicate with the outside.
2. A two-step three-phase anaerobic separation device according to claim 1, characterized in that: The top of the anaerobic reactor is covered with a sealing plate (21), the sealing plate (21) is in the shape of a ring, the sealing plate (21), the upper edge of the anaerobic reactor wall (2) and the upper edge of the upper partition (11) are connected to form an air chamber (31), and a biogas discharge pipe, a pressure gauge and a safety valve are arranged on the sealing plate (21).
3. A two-step three-phase anaerobic separation device according to claim 1, characterized in that: The inner wall of the return pipe (4) is evenly provided with three steel slide plates, and the steel slide plates have the same length as the return pipe (4).
4. A two-step three-phase anaerobic separation device according to claim 1, characterized in that: A circular support plate is provided at the upper end of the return pipe (4), a bracket (7) is mounted on the support plate, the bracket (7) is in a well shape, and its end is fixedly connected to the upper edge of the upper partition (11), and a movable cover plate (8) is provided on the bracket (7).
5. The two-step three-phase anaerobic separation device according to claim 1, characterized in that: The water collecting trough (5) is provided with a water outlet weir (51), and the water outlet weir (51) adopts a triangular weir mouth.
6. A two-step three-phase anaerobic separation device according to claim 1, characterized in that: The angle between the upper edge of the frustum guide plate (13) and the upper partition plate (11) is greater than 10 degrees and less than 15 degrees.
7. The two-step three-phase anaerobic separation device according to claim 1, characterized in that: The included angle of the lower partition (12) is greater than 50 degrees and less than 60 degrees.