Baffling type hydrolytic acidification reactor

Abstract

The baffling type hydrolytic acidification reactor comprises a plurality of reaction tanks, each reaction tank comprises a down-flow cavity and an up-flow cavity, a combined packing piece is arranged in each up-flow cavity, the combined packing pieces are located between an up-flow inlet and an up-flow outlet in the up-down direction and used for treating sewage, the reaction tanks are sequentially connected in series, and the up-flow inlet and the up-flow outlet are communicated with the up-flow inlet and the up-flow outlet. A water inlet channel is arranged above the downflow cavity of the reaction tank located at the most upstream, the water inlet channel is communicated with a water inlet pipe, the water inlet pipe is used for introducing water into the water inlet channel, a plurality of water distribution holes are formed in the bottom of the water inlet channel, and the water inlet channel is communicated with the downflow cavity of the reaction tank located at the most upstream through the water distribution holes; the upflow outlet of the upflow cavity of the most downstream reaction tank is communicated with a water outlet pipe, and the upflow outlet of the upflow cavity of the upstream reaction tank is communicated with the downflow inlet of the downflow cavity of the downstream reaction tank in the two adjacent reaction tanks in the upstream and the downstream. Therefore, the baffling type hydrolytic acidification reactor disclosed by the utility model has the advantage of being convenient for sewage treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a baffled hydrolysis acidification reactor. Background Technology

[0002] Hydrolysis acidification, as a pretreatment technology for organic wastewater, refers to controlling the anaerobic biological reaction at the hydrolysis acidification stage. In this stage, complex organic matter is first decomposed into simpler organic matter under the action of extracellular enzymes of anaerobic bacteria. For example, cellulose is hydrolyzed into simpler sugars; proteins into simpler amino acids; and lipids into fatty acids and glycerol. After hydrolysis acidification treatment, the biodegradability of the wastewater is improved, which is beneficial for subsequent aerobic biological treatment. However, related technologies have drawbacks such as uneven water distribution, low tank volume utilization, and low sludge-water transfer efficiency in hydrolysis acidification reactors. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a baffled hydrolysis acidification reactor.

[0004] This utility model embodiment of the baffled hydrolysis acidification reactor includes: multiple reaction tanks, each reaction tank including a downflow chamber and an upflow chamber. The downflow chamber has a downflow inlet at its upper part and a downflow outlet at its lower part. The upflow chamber has an upflow inlet at its lower part and an upflow outlet at its upper part. The upflow inlet is connected to the downflow outlet. A combined packing element is provided in the upflow chamber. The combined packing element is located between the upflow inlet and the upflow outlet in the vertical direction. The combined packing element is used to treat wastewater. The multiple reaction tanks are connected in series. An inlet channel is provided above the downflow chamber of the upstream reaction tank, and the inlet channel is connected to an inlet pipe. The inlet pipe is used to supply water into the inlet channel. The bottom of the inlet channel is provided with multiple water distribution holes, and the inlet channel is connected to the downflow chamber of the upstream reaction tank through the multiple water distribution holes. The upflow outlet of the upflow chamber of the downstream reaction tank is connected to an outlet pipe. In two adjacent upstream and downstream reaction tanks, the upflow outlet of the upflow chamber of the upstream tank is connected to the downflow inlet of the downflow chamber of the downstream tank.

[0005] Therefore, the baffled hydrolysis acidification reactor according to the embodiments of the present invention has the advantage of facilitating the treatment of wastewater.

[0006] In some embodiments, the number of reaction tanks is greater than or equal to three, and the plurality of reaction tanks are connected in sequence in a first direction, and each of the upflow chambers is provided with a sludge discharge hole at the bottom.

[0007] In some embodiments, the ratio of the flow velocity of the water in the water distribution hole to the flow velocity of the water in the water inlet pipe is (0.4-0.6):1;

[0008] The riser outlet of the riser chamber in the downstream reaction tank is connected to the effluent channel, and the effluent channel is connected to the effluent pipe.

[0009] In some embodiments, the volume ratio of the descending cavity to the ascending cavity is 1:(4-6).

[0010] In some embodiments, a plurality of the water distribution holes are evenly distributed at the bottom of the water inlet channel;

[0011] The cross-section of the reaction tank is rectangular;

[0012] The reaction tank includes a first baffle, a second baffle, and a third baffle arranged sequentially in the first direction. The thickness directions of the first baffle, the second baffle, and the third baffle are all in the first direction. The bottom of the second baffle is spaced apart from the bottom of the reaction tank. The first baffle and the second baffle define the wall surface of the downflow cavity in the first direction, and the second baffle and the third baffle define the wall surface of the upflow cavity in the first direction.

[0013] In two adjacent reaction tanks located upstream and downstream, the third baffle of the upstream tank and the first baffle of the downstream tank are the same baffle.

[0014] In some embodiments, the area ratio of the cross-section of the combined packing element to the cross-section of the riser cavity is greater than or equal to 0.5;

[0015] The distance between the bottom of the combined packing element and the bottom surface of the riser cavity is greater than or equal to 2 meters;

[0016] The top of the combined packing element is located below the riser outlet, and the distance between the top of the combined packing element and the riser outlet is 1 meter.

[0017] In some embodiments, the combined packing elements are spaced apart from the sidewalls of the reaction tank in the second direction on both sides in the second direction, and any two of the first direction, the second direction, and the up-down direction are perpendicular to each other.

[0018] The combined packing element includes a support frame and multiple packing strings located within the support frame. The multiple packing strings are arranged in a matrix. Each packing string includes multiple packing elements. The distance between two adjacent packing elements in the first direction, the second direction, and the up-down direction is greater than or equal to 200 mm and less than or equal to 300 mm.

[0019] The length direction of the water inlet channel is the second direction, and a plurality of water distribution holes are spaced apart at the bottom of the water inlet channel along the second direction.

[0020] In some embodiments, each of the reaction tanks is provided with a first axillary angle and a second axillary angle, both of which extend along a second direction, and any two of the first direction, the second direction and the up-down direction are perpendicular to each other.

[0021] The first axillary angle fills the angle between the first baffle and the bottom surface of the reaction tank, and the second axillary angle fills the angle between the third baffle and the bottom surface of the reaction tank;

[0022] The first axillary angle has a first inclined surface facing the third baffle, the upper edge of the first inclined surface is connected to the first baffle, the lower edge of the first inclined surface is connected to the bottom surface of the reaction tank, and the first inclined surface is inclined downward in the first direction away from the first baffle.

[0023] The second axilla has a second inclined surface facing the first baffle. The upper edge of the second inclined surface is connected to the third baffle, and the lower edge of the second inclined surface is connected to the bottom surface of the reaction tank. The second inclined surface is inclined downward in the first direction away from the third baffle.

[0024] In some embodiments, the cross-sections of the first axillary angle and the second axillary angle are right-angled triangles;

[0025] The bottom of the second baffle is provided with a guide plate, which is arranged parallel to the first inclined surface;

[0026] The angle between the first inclined plane and the second inclined plane and the horizontal plane is greater than or equal to 55° and less than or equal to 65°.

[0027] In some embodiments, each of the upflow chambers is provided with a sludge discharge pipe at its bottom, and the outlet of the sludge discharge pipe extends out of the reaction tank from the sludge discharge hole and is connected to a sludge discharge pump;

[0028] The sludge discharge pipe has a plurality of first sludge discharge holes and a plurality of second sludge discharge holes, which are alternately arranged in sequence along the extension direction of the sludge discharge pipe. The orientation of the first sludge discharge holes and the orientation of the second sludge discharge holes are both inclined downwards. The angle between the orientation of the first sludge discharge holes and the horizontal plane is greater than or equal to 30° and less than or equal to 60°. The orientations of the first sludge discharge holes and the second sludge discharge holes are arranged opposite to each other in the first direction. Attached Figure Description

[0029] Figure 1This is a front view of the baffled hydrolysis acidification reactor according to an embodiment of the present invention.

[0030] Figure 2 This is a top view of a baffled hydrolysis acidification reactor according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the sludge discharge pipe according to an embodiment of the present utility model.

[0032] Figure label:

[0033] 1. Reaction tank; 11. Downflow chamber; 111. Downflow inlet; 112. Downflow outlet; 12. Upflow chamber; 121. Upflow inlet; 122. Upflow outlet; 13. First baffle; 14. Second baffle; 15. Third baffle.

[0034] 2. Combined packing components; 21. Packing components;

[0035] 31. Water inlet pipe; 32. Water inlet channel; 33. Water distribution hole; 34. Water outlet pipe; 35. Water outlet channel;

[0036] 41. First axillary angle; 42. First inclined plane; 43. Second axillary angle; 44. Second inclined plane; 45. Deflector plate;

[0037] 5. Sludge discharge pipe, 51. Sludge discharge pump, 52. First sludge discharge hole, 53. Second sludge discharge hole. Detailed Implementation

[0038] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The following description, with reference to the accompanying drawings, describes a baffled hydrolysis acidification reactor according to an embodiment of the present invention. Figures 1 to 3 As shown, the baffled hydrolysis acidification reactor according to an embodiment of the present invention includes multiple reaction tanks 1.

[0040] Each reaction tank 1 includes a downflow chamber 11 and an upflow chamber 12. The downflow chamber 11 has a downflow inlet 111 at its upper part and a downflow outlet 112 at its lower part. The upflow chamber 12 has an upflow inlet 121 at its lower part and an upflow outlet 122 at its upper part, with the upflow inlet 121 communicating with the downflow outlet 112. A combined packing element 2 is installed inside the upflow chamber 12, positioned vertically between the upflow inlet 121 and the upflow outlet 122. The combined packing element 2 is used to treat wastewater. Thus, wastewater entering the downflow chamber 11 can flow downwards and exit through the downflow outlet 112, then enter the upflow chamber 12 through the upflow inlet 121, and finally flow upwards through the combined packing element 2 before exiting through the upflow outlet 122, allowing the combined packing element 2 to treat the wastewater during this process. For example, the downflow chamber 11 may have a downflow inlet 111 at its top and a downflow outlet 112 at its bottom. The bottom of the riser cavity 12 is provided with a riser inlet 121, and the top of the riser cavity 12 is provided with a riser outlet 122.

[0041] like Figure 1 and Figure 2 As shown, multiple reaction tanks 1 are connected in series. Specifically, the number of reaction tanks 1 is greater than or equal to three, and the multiple reaction tanks 1 are connected sequentially in a first direction. The length direction of the reaction tank 1 is the first direction, and the width direction of the reaction tank 1 is the second direction. Any two of the first direction, the second direction, and the up / down direction are perpendicular to each other. The downflow chamber 11 and the upflow chamber 12 are arranged side by side in the first direction, and the upflow outlet 122 is located on the side of the upflow chamber 12 away from the downflow chamber 11 in the first direction. The first direction can be a front-to-back direction, and the second direction can be a left-to-right direction. For example, the length direction of the reaction tank 1 is the front-to-back direction, the width direction of the reaction tank 1 is the left-to-right direction, and the multiple reaction tanks 1 are connected sequentially in the front-to-back direction.

[0042] Above the downflow chamber 11 of the upstream reaction tank 1, there is an inlet channel 32, which is connected to an inlet pipe 31 for supplying water into the inlet channel 32. The bottom of the inlet channel 32 has multiple water distribution holes 33, which connect to the downflow chamber 11 of the upstream reaction tank 1. The upflow outlet 122 of the upflow chamber 12 of the downstream reaction tank 1 is connected to an outlet pipe 34. In two adjacent reaction tanks 1, the upflow outlet 122 of the upstream upflow chamber 12 is connected to the downflow inlet 111 of the downstream downflow chamber 11. The upflow outlet 122 of the downstream upflow chamber 12 is connected to an outlet channel 35, which is connected to the outlet pipe 34. The treated water discharged from the upflow outlet 122 of the upflow chamber 12 located at the downstream end of the reaction tank 1 can enter the effluent channel 35 and then be discharged from the effluent pipe 34.

[0043] Specifically, the upstream and downstream directions represent the sequence of the wastewater treatment process. The upstream reaction tank 1 is adjacent to the inlet pipe 31, while the downstream reaction tank 1 is farther from the inlet pipe 31. Wastewater discharged from the inlet pipe 31 first passes through the upstream reaction tank 1 and then enters the downstream reaction tank 1. The upstream reaction tank 1 is the first tank into which wastewater enters, and the downstream reaction tank 1 is the last tank into which wastewater enters. After the wastewater discharged from the inlet pipe 31 enters the inlet channel 32, it then flows through multiple water distribution holes 33 into the downflow chamber 11 of the upstream reaction tank 1. This reduces the flow velocity of the wastewater entering the downflow chamber 11, facilitating wastewater treatment. Wastewater discharged from the upstream reaction tank 1 enters the downstream reaction tank 1 for treatment until it reaches the downstream reaction tank 1, then flows into the outlet channel 35 and finally into the outlet pipe 34 for discharge.

[0044] Multiple water distribution holes 33 are evenly distributed at the bottom of the inlet channel 32. Specifically, the length direction of the inlet channel 32 is the second direction, and the multiple water distribution holes 33 are spaced apart along the second direction at the bottom of the inlet channel 32. This allows the multiple water distribution holes 33 to make the sewage inflow more uniform.

[0045] In some embodiments, the flow velocity ratio of the water in the water distribution hole 33 to the flow velocity ratio of the water in the inlet pipe 31 is (0.4-0.6):1. Specifically, the flow velocity of the water in the water distribution hole 33 can be controlled by controlling the number and diameter of the water distribution hole 33. For example, the flow velocity ratio of the water in the water distribution hole 33 to the flow velocity ratio of the water in the inlet pipe 31 is 0.5:1.

[0046] like Figures 1 to 3 As shown, in some embodiments, each riser chamber 12 is provided with a sludge discharge hole at its bottom, allowing the sludge falling from the combined packing element 2 to be discharged through the sludge discharge hole. Specifically, each riser chamber 12 is provided with a sludge discharge pipe 5 at its bottom, the outlet of which extends out of the reaction tank 1 from the sludge discharge hole and is connected to a sludge discharge pump 51, allowing the sludge discharge pump 51 to extract the sludge from the bottom of the riser chamber 12 through the sludge discharge pipe 5.

[0047] In some embodiments, the sludge discharge pipe 5 has a plurality of first sludge discharge holes 52 and a plurality of second sludge discharge holes 53, which are alternately arranged in sequence along the extension direction of the sludge discharge pipe 5. The orientations of the first sludge discharge holes 52 and the second sludge discharge holes 53 are both inclined downwards, and the angles between the orientations of the first sludge discharge holes 52 and the second sludge discharge holes 53 and the horizontal plane are greater than or equal to 30° and less than or equal to 60°. The orientations of the first sludge discharge holes 52 and the second sludge discharge holes 53 are opposite to each other in a first direction. Specifically, the extension direction of the sludge discharge pipe 5 is a second direction, perpendicular to the first direction. The downward inclination of the first sludge discharge holes 52 and the second sludge discharge holes 53 facilitates the intake of sludge from the bottom of the riser chamber 12 into the sludge discharge pipe 5 and its discharge from the riser chamber 12. For example, the angle between the orientations of the first sludge discharge holes 52 and the second sludge discharge holes 53 and the horizontal plane is 45°. The first row of mud holes 52 and the second row of mud holes 53 are arranged facing away from each other in the front-to-back direction. The multiple first row of mud holes 52 and the multiple second row of mud holes 53 are arranged alternately in the left-to-right direction.

[0048] In some embodiments, the volume ratio of the downflow chamber 11 to the upflow chamber 12 is 1:(4-6). By controlling the volume ratio of the downflow chamber 11 to the upflow chamber 12, the wastewater treatment rate within the upflow chamber 12 can be adjusted. For example, the volume ratio of the downflow chamber 11 to the upflow chamber 12 is 1:5.

[0049] In some embodiments, the reaction tank 1 has a rectangular cross-section and includes a first baffle 13, a second baffle 14, and a third baffle 15 arranged sequentially in a first direction. The thickness directions of the first baffle 13, the second baffle 14, and the third baffle 15 are all in the first direction, and the bottom of the second baffle 14 is spaced apart from the bottom of the reaction tank 1. The first baffle 13 and the second baffle 14 define the wall surface of the downflow chamber 11 in the first direction, and the second baffle 14 and the third baffle 15 define the wall surface of the upflow chamber 12 in the first direction. That is, the second baffle 14 is a partition in the reaction tank 1 that separates the downflow chamber 11 and the upflow chamber 12, and the bottoms of the downflow chamber 11 and the upflow chamber 12 are connected. The bottom of the second baffle 14 and the first baffle 13 (and the sidewall in the second direction of the reaction tank 1) define a downflow outlet 112, and the bottom of the second baffle 14 and the bottom of the reaction tank 1 (and the sidewall in the second direction of the reaction tank 1) define an upflow inlet 121.

[0050] like Figure 1As shown, in some embodiments, the third baffle 15 of the upstream reaction tank 1 and the first baffle 13 of the downstream reaction tank 1 are the same baffle, that is, the baffle can be the upstream third baffle 15 or the downstream first baffle 13. For example, the front side of the baffle defines the wall of the rising flow cavity 12, and the rear side of the baffle defines the wall of the falling flow cavity 11.

[0051] In some embodiments, the area ratio of the cross-section of the combined packing member 2 to the cross-section of the upflow cavity 12 is greater than or equal to 0.5. Specifically, the cross-section of the combined packing member 2 is rectangular. The two sides of the combined packing member 2 in the first direction are respectively connected to the second baffle 14 and the third baffle 15 (detachably). The two sides of the combined packing member 2 in the second direction are spaced apart from the sidewalls of the reaction tank 1 in the second direction, thereby facilitating maintenance of the combined packing member 2 and improving wastewater treatment efficiency. For example, the area ratio of the cross-section of the combined packing member 2 to the cross-section of the upflow cavity 12 is greater than or equal to 0.5 and less than or equal to 0.7. The two sides of the combined packing member 2 in the front-rear direction are respectively connected to the second baffle 14 and the third baffle 15 (detachably). The two sides of the combined packing member 2 in the left-right direction are spaced apart from the sidewalls of the reaction tank 1 in the second direction.

[0052] In some embodiments, the distance between the bottom of the combined packing element 2 and the bottom surface of the riser chamber 12 is greater than or equal to 2 meters, thereby increasing the space for sludge containment. The top of the combined packing element 2 is located below the riser outlet 122, and the distance between the top of the combined packing element 2 and the riser outlet 122 is 1 meter, so as to leave buffer space for the treated wastewater.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments, the combined packing element 2 includes a support frame and multiple packing strings located within the support frame. The multiple packing strings are arranged in a matrix, and each packing string includes multiple packing elements 21. The distance between two adjacent packing elements 21 in the first direction, the second direction, and the up-down direction is greater than or equal to 200 mm and less than or equal to 300 mm. For example, the distance between two adjacent packing elements 21 in the front-back direction, the left-right direction, and the up-down direction is 220 mm, 240 mm, 260 mm, 270 mm, or 280 mm.

[0054] like Figure 1 As shown, in some embodiments, each reaction tank 1 is provided with a first axillary angle 41 and a second axillary angle 43, both of which extend along a second direction.

[0055] The first axillary angle 41 fills the angle between the first baffle 13 and the bottom surface of the reaction tank 1, and the second axillary angle 43 fills the angle between the third baffle 15 and the bottom surface of the reaction tank 1. The cross-sections of the first axillary angle 41 and the second axillary angle 43 are right triangles.

[0056] The first axilla 41 has a first inclined surface 42 facing the third baffle 15 in the first direction. The upper edge of the first inclined surface 42 is connected to the first baffle 13, and the lower edge of the first inclined surface 42 is connected to the bottom surface of the reaction tank 1. The first inclined surface 42 is inclined downward in the first direction away from the first baffle 13. The bottom of the second baffle 14 is provided with a guide plate 45, which is parallel to the first inclined surface 42. Thus, the guide plate 45 can cooperate with the first inclined surface 42 to guide the sewage entering the riser chamber 12, thereby reducing power consumption. For example, the side of one right-angled side of the first axilla 41 is in contact with the third baffle 15, and the side of the other right-angled side of the first axilla 41 is in contact with the bottom surface of the reaction tank 1.

[0057] The second axillary angle 43 has a second inclined surface 44 facing the first baffle 13 in the first direction. The upper edge of the second inclined surface 44 is connected to the third baffle 15, and the lower edge of the second inclined surface 44 is connected to the bottom surface of the reaction tank 1. The second inclined surface 44 is inclined downward in the first direction away from the third baffle 15.

[0058] In some embodiments, the angle between the first inclined plane 42 and the second inclined plane 44 and the horizontal plane is greater than or equal to 55° and less than or equal to 65°. For example, the angle between the first inclined plane 42 and the second inclined plane 44 and the horizontal plane is 60°.

[0059] The baffled hydrolysis acidification reactor according to the present invention has the advantages of uniform water intake, easy sludge discharge, low power consumption and good treatment effect, thus facilitating the treatment of sewage.

[0060] Therefore, the baffled hydrolysis acidification reactor according to the embodiments of the present invention has the advantage of facilitating the treatment of wastewater.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A baffled hydrolysis acidification reactor, characterized in that, include: Multiple reaction tanks are provided, each including a downflow chamber and an upflow chamber. The downflow chamber has a downflow inlet at its upper part and a downflow outlet at its lower part. The upflow chamber has an upflow inlet at its lower part and an upflow outlet at its upper part. The upflow inlet communicates with the downflow outlet. A combined packing element is provided within the upflow chamber, positioned vertically between the upflow inlet and the upflow outlet. The combined packing element is used for treating wastewater. The multiple reaction tanks are connected in series. The upstream reaction tank... A water inlet channel is provided above the descending flow chamber, and the water inlet channel is connected to a water inlet pipe. The water inlet pipe is used to supply water into the water inlet channel. The bottom of the water inlet channel is provided with multiple water distribution holes. The water inlet channel is connected to the descending flow chamber of the upstream reaction tank through the multiple water distribution holes. The rising flow outlet of the rising flow chamber of the downstream reaction tank is connected to a water outlet pipe. In two adjacent upstream and downstream reaction tanks, the rising flow outlet of the rising flow chamber of the upstream tank is connected to the descending flow inlet of the descending flow chamber of the downstream tank.

2. The baffled hydrolysis acidification reactor according to claim 1, characterized in that, The number of reaction tanks is greater than or equal to three, and the multiple reaction tanks are connected in sequence in the first direction. Each of the upflow chambers is provided with a sludge discharge hole at the bottom.

3. The baffled hydrolysis acidification reactor according to claim 2, characterized in that, The ratio of the flow velocity of the water in the distribution hole to the flow velocity of the water in the inlet pipe is (0.4-0.6):1; The riser outlet of the riser chamber in the downstream reaction tank is connected to the effluent channel, and the effluent channel is connected to the effluent pipe.

4. The baffled hydrolysis acidification reactor according to claim 1, characterized in that, The volume ratio of the descending flow chamber to the ascending flow chamber is 1:(4-6).

5. The baffled hydrolysis acidification reactor according to claim 2, characterized in that, The plurality of water distribution holes are evenly arranged at the bottom of the water inlet channel; The cross-section of the reaction tank is rectangular; The reaction tank includes a first baffle, a second baffle, and a third baffle arranged sequentially in the first direction. The thickness directions of the first baffle, the second baffle, and the third baffle are all in the first direction. The bottom of the second baffle is spaced apart from the bottom of the reaction tank. The first baffle and the second baffle define the wall surface of the downflow cavity in the first direction, and the second baffle and the third baffle define the wall surface of the upflow cavity in the first direction. In two adjacent reaction tanks located upstream and downstream, the third baffle of the upstream tank and the first baffle of the downstream tank are the same baffle.

6. The baffled hydrolysis acidification reactor according to claim 5, characterized in that, The area ratio of the cross-section of the combined packing element to the cross-section of the riser cavity is greater than or equal to 0.5; The distance between the bottom of the combined packing element and the bottom surface of the riser cavity is greater than or equal to 2 meters; The top of the combined packing element is located below the riser outlet, and the distance between the top of the combined packing element and the riser outlet is 1 meter.

7. The baffled hydrolysis acidification reactor according to claim 5, characterized in that, The combined packing elements are spaced apart from the sidewalls of the reaction tank in the second direction on both sides in the second direction, and any two of the first direction, the second direction, and the up and down direction are perpendicular to each other. The combined packing element includes a support frame and multiple packing strings located within the support frame. The multiple packing strings are arranged in a matrix. Each packing string includes multiple packing elements. The distance between two adjacent packing elements in the first direction, the second direction, and the up-down direction is greater than or equal to 200 mm and less than or equal to 300 mm. The length direction of the water inlet channel is the second direction, and a plurality of water distribution holes are spaced apart at the bottom of the water inlet channel along the second direction.

8. The baffled hydrolysis acidification reactor according to claim 5, characterized in that, Each of the reaction tanks is provided with a first axillary angle and a second axillary angle, both of which extend along a second direction, and any two of the first direction, the second direction, and the up-down direction are perpendicular to each other. The first axillary angle fills the angle between the first baffle and the bottom surface of the reaction tank, and the second axillary angle fills the angle between the third baffle and the bottom surface of the reaction tank; The first axillary angle has a first inclined surface facing the third baffle, the upper edge of the first inclined surface is connected to the first baffle, the lower edge of the first inclined surface is connected to the bottom surface of the reaction tank, and the first inclined surface is inclined downward in the first direction away from the first baffle. The second axilla has a second inclined surface facing the first baffle. The upper edge of the second inclined surface is connected to the third baffle, and the lower edge of the second inclined surface is connected to the bottom surface of the reaction tank. The second inclined surface is inclined downward in the first direction away from the third baffle.

9. The baffled hydrolysis acidification reactor according to claim 8, characterized in that, The cross-sections of the first axillary angle and the second axillary angle are right-angled triangles; The bottom of the second baffle is provided with a guide plate, which is arranged parallel to the first inclined surface; The angle between the first inclined plane and the second inclined plane and the horizontal plane is greater than or equal to 55° and less than or equal to 65°.

10. The baffled hydrolysis acidification reactor according to claim 2, characterized in that, Each of the upflow chambers is provided with a sludge discharge pipe at the bottom, and the outlet of the sludge discharge pipe extends out of the reaction tank from the sludge discharge hole and is connected to the sludge discharge pump; The sludge discharge pipe has a plurality of first sludge discharge holes and a plurality of second sludge discharge holes, which are alternately arranged in sequence along the extension direction of the sludge discharge pipe. The orientation of the first sludge discharge holes and the orientation of the second sludge discharge holes are both inclined downwards. The angle between the orientation of the first sludge discharge holes and the horizontal plane is greater than or equal to 30° and less than or equal to 60°. The orientations of the first sludge discharge holes and the second sludge discharge holes are arranged opposite to each other in the first direction.

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