Anaerobic treatment device and three-phase separator thereof
By designing a multi-layer herringbone three-phase separator arranged in an anaerobic treatment device, an angled overflow channel is formed, which solves the problem that the sludge cannot flow back to the reaction zone when the traditional three-phase separator is at a high water inlet flow, and achieves higher processing capacity and uniform water effluent distribution.
Patent Information
- Application Number
- CN202421642794.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-11
AI Technical Summary
When traditional three-phase separators treat high inlet flow, the gap flow rate is too fast, causing the sludge to flow back to the anaerobic reaction zone, affecting the reactor's processing capacity.
The first separation unit and the second separation unit are sequentially arranged from bottom to top, each including a multi-layer stacked herringbone plate, forming an angled first overflow channel and a second overflow channel, increasing the gap width to reduce the flow rate, and increasing the water outlet resistance using a maze flow channel.
Under the same treatment water volume conditions, a lower flow rate and stronger sludge interception capacity are achieved, ensuring the treatment capacity of the reactor and making the effluent distribution more even.
Smart Images
Figure CN222974982U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wastewater treatment, in particular to an anaerobic treatment device and a three-phase separator thereof. Background Technique
[0002] As is well known, when treating wastewater anaerobically, oxygen supply is not required, which is energy-saving and can generate biogas energy. When separating the anaerobically treated sewage from the anaerobic sludge, it is often interfered by biogas. Therefore, the conventional method is to use herringbone plates that are alternately stacked and closed at the top for three-phase separation. The gas rises quickly and can enter the top of the herringbone plates to gather and discharge. The water and anaerobic sludge flow out in a folded manner from the gaps of the herringbone plates. In the upper area where the biogas has been separated, since the density of the sludge is greater than that of the water, the sludge undergoes sedimentation and slides down along the side of the herringbone plate back to the reaction zone.
[0003] For a traditional three-phase separator, the three-phase separator is formed by stacking multiple layers of herringbone plates. The gap between adjacent herringbone plates is smaller than the width of the herringbone plate. The herringbone plate above the gap is placed directly above the gap and overlaps symmetrically on the left and right. Obviously, only when the gap width is smaller than the width of the herringbone plate, that is, the gap width is less than half of the separation zone width (the sum of the two widths is equal to the separation zone width), can effective separation be achieved. In this method, the width of the gap is about one-third of the separation zone width, that is, the separation area of the gap accounts for one-third of the total separation area of the anaerobic reactor separation zone. This greatly affects the treatment capacity of the reactor. For example, when the influent flow rate is large, the flow velocity of the gap will be too fast, and the sludge cannot flow back to the anaerobic reaction zone by gravity. Summary of the Utility Model
[0004] Based on this, in view of the problem that the layout of the herringbone plates in the existing three-phase separator affects the treatment capacity of the reactor, it is necessary to provide an anaerobic treatment device and a three-phase separator thereof.
[0005] A three-phase separator includes: a first separation unit and a second separation unit that are alternately arranged from bottom to top. Both the first separation unit and the second separation unit include multiple layers of stacked herringbone plates. The multiple layers of herringbone plates in the first separation unit are sequentially overlapped in a first inclined direction to form a first flow-through channel, and the multiple layers of herringbone plates in the second separation unit are sequentially overlapped in a second inclined direction to form a second flow-through channel. An included angle is formed between the first flow-through channel and the second flow-through channel.
[0006] In one embodiment, the first separation unit includes three layers of herringbone plates, and the gap between every two adjacent herringbone plates in each layer is greater than 1 times the width of the herringbone plate and less than 2 times the width of the herringbone plate.
[0007] In one embodiment, in the first separation unit, the overlapping length between the third layer of chevron plates and the first layer of chevron plates is twice the overlapping length between the second layer of chevron plates and the first layer of chevron plates.
[0008] In one embodiment, a common layer of chevron plates is shared at the connection between the second separation unit and the first separation unit.
[0009] In one embodiment, the phase angles of the second layer of chevron plates in the second separation unit and the second layer of chevron plates in the first separation unit are the same.
[0010] In one embodiment, the phase angles of the third layer of chevron plates in the second separation unit and the first layer of chevron plates in the first separation unit are the same.
[0011] In one embodiment, the layer spacing of the chevron plates in the first separation unit and the second separation unit is the same.
[0012] In one embodiment, the chevron plate includes a first flow guide plate and a second flow guide plate. The first flow guide plate and the second flow guide plate are connected and form an angle, and the first flow guide plate and the second flow guide plate have the same specifications.
[0013] In one embodiment, the chevron plates are overlapped in sequence, so as to form a wide opening with a larger width and a narrow opening with a smaller width between the upper and lower adjacent layers of chevron plates. The wide opening forms the first flow passage and the second flow passage.
[0014] An anaerobic treatment device includes:
[0015] The three-phase separator as described in any one of the above.
[0016] For the above anaerobic treatment device and its three-phase separator, the multi-layer chevron plates of the first separation unit are overlapped in sequence in the first inclined direction, and the multi-layer chevron plates of the second separation unit are overlapped in sequence in the second inclined direction. The gaps between the chevron plates are covered by the multi-layer chevron plates. The width of the gap can be greater than the width of the chevron plate. As the width of the gap increases, under the condition of the same treatment water volume, the flow velocity is lower, the interception ability of the sludge is stronger, and the treatment capacity of the reactor is ensured. The first flow passage and the second flow passage form an angle, increasing the resistance of the effluent, making the effluent distribution more uniform, utilizing the flow deflection and inertia laws of the water flow, throwing the granular sludge to the narrow area with a smaller water flow velocity for sedimentation separation, and at the same time taking out the flocculent sludge with poor performance from the reactor. Description of the Drawings
[0017] To more clearly illustrate the specific embodiments of the present utility model, the following will briefly introduce the drawings required for the specific embodiments. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
[0018] Figure 1 It is a schematic structural diagram of an anaerobic treatment device in an embodiment;
[0019] Figure 2 It is a schematic diagram of a five-layer design of the herringbone plate of the three-phase separator;
[0020] Figure 3 It is a schematic diagram of a six-layer design of the herringbone plate of the three-phase separator;
[0021] Figure 4 It is a schematic diagram of the herringbone plate forming a wide opening, a narrow opening, and a granular sludge separation zone.
[0022] Reference numerals:
[0023] 10 - Anaerobic reaction tank, 20 - Inlet system, 30 - Three-phase separator, 31 - First separation unit, 32 - Second separation unit, 33 - Herringbone plate, 332 - First guide plate, 334 - Second guide plate, 34 - First flow-through channel, 35 - Second flow-through channel, 36 - Wide opening, 37 - Narrow opening, 38 - Granular sludge separation zone, 40 - Outlet system. Specific embodiments
[0024] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will give a detailed description of the specific embodiments of the present utility model with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model.
[0027] Please refer to Figure 1 , a wastewater treatment device in an embodiment includes an anaerobic reaction tank 10, a water inlet system 20, a three-phase separator 30, and a water outlet system 40. The water inlet system 20 is used to provide wastewater for the anaerobic reaction tank 10. The three-phase separator 30 is installed on the upper part of the anaerobic reaction tank 10. The three-phase separator 30 is used to separate gas, liquid, and solids in the wastewater. The water outlet system 40 is used to discharge the treated wastewater.
[0028] In an embodiment, the three-phase separator 30 includes a first separation unit 31 and a second separation unit 32 arranged alternately from bottom to top. That is to say, the first separation unit 31 and the second separation unit 32 are arranged alternately along the axis of the anaerobic reaction tank 10, so that the wastewater is in a folded flow state during the three-phase separation process, increasing the resistance of the effluent and making the effluent distribution more uniform.
[0029] In an embodiment, both the first separation unit 31 and the second separation unit 32 include multi-layer stacked herringbone plates 33. The multi-layer herringbone plates 33 of the first separation unit 31 are sequentially lapped in the first inclined direction to form a first flow channel 34. The multi-layer herringbone plates 33 of the second separation unit 32 are sequentially lapped in the second inclined direction to form a second flow channel 35. In this embodiment, the first inclined direction is inclined upward to the upper right, the second inclined direction is inclined upward to the upper left, and the first flow channel 34 and the second flow channel 35 form an included angle.
[0030] In an embodiment, the first separation unit 31 includes three layers of herringbone plates 33. The second layer of herringbone plates 33 is lapped on the upper right of the first layer, and the lapping length ≥ 5 cm. The lapping direction of the third layer of herringbone plates 33 and the second layer of herringbone plates 33 is the same as that of the first layer and the second layer, and the lapping length is the same. Moreover, the lapping width L2 between the third layer and the first layer is not less than 2 times the lapping length L1 between the second layer of herringbone plates 33 and the first layer of herringbone plates 33, ensuring that the gaps between the herringbone plates 33 can be covered.
[0031] In one embodiment, the gap between two adjacent herringbone plates 33 in each layer is greater than one times the width of the herringbone plate 33 and less than two times the width of the herringbone plate 33. The gap between two adjacent herringbone plates 33 being greater than one times the width of the herringbone plate 33 can ensure that the gap between the herringbone plates 33 is wide enough. Under the condition of the same treated water volume, the wastewater has a lower flow rate and a stronger ability to intercept sludge, ensuring the treatment capacity of the reactor. The gap between two adjacent herringbone plates 33 being less than two times the width of the herringbone plate 33 enables the upper two layers of herringbone plates 33 to cover the gap, preventing the wastewater from escaping and ensuring the wastewater treatment effect.
[0032] In one embodiment, the connection between the second separation unit 32 and the first separation unit 31 shares one layer of herringbone plates 33. The first layer of herringbone plates 33 of the second separation unit 32 is the last layer of herringbone plates 33 of the first separation unit 31, and the first flow passage 34 and the second flow passage 35 turn and change direction at this location. The second separation unit 32 can be designed with 2 layers or three layers according to needs.
[0033] Please refer to Figure 2 and Figure 3 , wherein, the phase angle of the second layer of herringbone plates 33 of the second separation unit 32 is the same as that of the second layer of herringbone plates 33 of the first separation unit 31, that is, it is directly above the second layer of herringbone plates 33 of the first separation unit 31, and is used to deflect the first flow passage 34 of the first separation unit 31 by 90° to form a labyrinth channel. The phase angle of the third layer of herringbone plates 33 is the same as that of the first layer of herringbone plates 33 of the first separation unit 31, that is, the third layer of herringbone plates 33 is directly above the first layer of herringbone plates 33 of the first separation unit 31, and symmetrically extends the flow passage.
[0034] Please refer to again Figure 2 , in one embodiment, the height and inclination angle of each layer of herringbone plates 33 are the same. The herringbone plate 33 includes a first guide plate 332 and a second guide plate 334. The first guide plate 332 and the second guide plate 334 are connected and form an included angle. The opening of the herringbone plate 33 faces downward. The first guide plate 332 and the second guide plate 334 have the same specifications, and the herringbone plate 33 has a left-right symmetrical structure. The layer spacing of the herringbone plates 33 of the first separation unit 31 and the second separation unit 32 is the same, ensuring the same flow rate of the sewage and wastewater.
[0035] Please refer to together Figure 4 , in one embodiment, the herringbone plates 33 are overlapped in sequence, and a wide opening 36 with a relatively large width and a narrow opening 37 with a relatively small width can be formed between the upper and lower adjacent layers of herringbone plates 33. The wide opening 36 can form the first flow passage 34 and the second flow passage 35, while the narrow opening 37 and the area where the herringbone plates 33 are located form a granular sludge separation area 38, which is used to precipitate and reflux the granular sludge into the reactor.
[0036] In one embodiment, the three-phase separator 30 is preferably made of materials such as PP, PE, PVC, stainless steel, and carbon steel for corrosion prevention. Of course, the three-phase separator 30 can also select other plastic or metal materials according to actual needs. The three-phase separator 30 is applicable to sewage with an influent suspended solid concentration of less than 5000 mg / L, with a maximum water production capacity of 10 tons per square meter per hour. It can well separate and discharge biogas and flocculent sludge, and ensure that the granular sludge reflux in the anaerobic tank does not flow out with the effluent.
[0037] For the above anaerobic treatment device and its three-phase separator 30, the structure of the three-phase separator 30 is simple. The herringbone plate 33 has only one size, which is simple to manufacture and convenient to assemble. The widths of the first flow-through channel 34 and the second flow-through channel 35 are greater than the width of the herringbone plate 33. Under the condition of the same treatment water volume, it has a lower flow rate and stronger sludge interception ability. The flow-through channels utilize the law of flow deflection and inertia of water flow to throw the granular sludge to the narrow area with a smaller water flow velocity for sedimentation and separation, and at the same time, carry out the flocculent sludge with poor performance out of the reactor. By using the maze-type flow channel for flow deflection, the resistance of the effluent is increased, making the effluent distribution more uniform.
[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.
Claims
1. A three-phase separator, characterized in that: include: The first separation unit and the second separation unit are alternately arranged from bottom to top, and the first separation unit and the second separation unit both include multiple layers of stacked herringbone plates, the multiple layers of the herringbone plates of the first separation unit are overlapped in a first inclined direction to form a first flow channel, and the multiple layers of the herringbone plates of the second separation unit are overlapped in a second inclined direction to form a second flow channel, and the first flow channel and the second flow channel form an angle.
2. The three-phase separator according to claim 1, characterized in that: The first separation unit includes three layers of herringbone plates, and a gap between two adjacent herringbone plates in each layer is greater than 1 times the width of the herringbone plates and less than 2 times the width of the herringbone plates.
3. The three-phase separator according to claim 1, characterized in that: In the first separation unit, the overlap length between the third layer of the herringbone plates and the first layer of the herringbone plates is twice the overlap length between the second layer of the herringbone plates and the first layer of the herringbone plates.
4. The three-phase separator according to claim 1, characterized in that: The second separation unit and the first separation unit share a layer of herringbone plate at the connection point.
5. The three-phase separator according to claim 4, characterized in that: The herringbone plate of the second layer of the second separation unit has the same phase angle as the herringbone plate of the second layer of the first separation unit.
6. The three-phase separator according to claim 4, characterized in that: The herringbone plate of the third layer of the second separation unit has the same phase angle as the herringbone plate of the first layer of the first separation unit.
7. The three-phase separator according to claim 1, characterized in that: The interlayer spacing of the herringbone plates in the first separation unit and the second separation unit is the same.
8. The three-phase separator according to claim 1, characterized in that: The herringbone plate includes a first guide plate and a second guide plate, the first guide plate and the second guide plate are connected to form an angle, and the first guide plate and the second guide plate have the same specifications.
9. The three-phase separator according to claim 1, characterized in that: The herringbone plates are overlapped in sequence to form a wide opening with a larger width and a narrow opening with a smaller width between two adjacent layers of the herringbone plates, and the wide opening forms the first flow passage and the second flow passage.
10. An anaerobic treatment device, characterized in that: include: A three-phase separator as claimed in any one of claims 1 to 9.