Biochar-added anaerobic filter pretreatment device

Abstract

The utility model provides an anaerobic filter pretreatment device added with charcoal, and belongs to the technical field of sewage pretreatment. Comprising an outer shell which is internally provided with an inner shell; the annular seat and the partition plate are vertically distributed in the inner shell, the inner area of the inner shell is divided into a precipitation layer, a reaction layer and a water distribution layer from top to bottom by the annular seat and the partition plate, and the water distribution layer is filled with sludge; the water distributor is rotationally connected to the interior of the water distribution layer, and a plurality of water spraying pipes distributed in an annular array are arranged on the side edge of the water distributor and used for injecting sewage; the spiral plate is arranged in the tubular gap between the outer shell and the inner shell, and the spiral plate is matched with the inner wall of the outer shell and the outer side wall of the inner shell to form a spiral channel. According to the utility model, the water distributor for rotationally injecting water is arranged, so that self-rotation is generated under the pushing action of water flow during water injection, the water injection dispersion effect is improved, and the sewage reaction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage pretreatment, in particular to an anaerobic filter pretreatment device with biochar added. Background Art

[0002] High-concentration organic wastewater is a type of wastewater, which mainly appears in the fields of domestic wastewater, food, papermaking, animal husbandry, landfill leachate, pharmaceuticals, chemicals, etc. For this type of wastewater, anaerobic treatment is generally used first. Compared with aerobic biological treatment technology, anaerobic treatment has the advantages of low energy consumption and high load, and can also produce usable biogas resources.

[0003] At present, anaerobic treatment usually adopts upflow anaerobic sludge blanket reactor. The sewage enters the bottom of the reactor after uniform water distribution, and the sewage passes through the anaerobic sludge blanket reactor from bottom to top. The main components include: water inlet distribution system, reaction zone, three-phase separator, water outlet system, air chamber, scum collection system, sludge discharge system, etc.

[0004] However, the outlet end of the existing water distributor is relatively short and has limited dispersion effect on the discharged water flow. Therefore, the present application provides an anaerobic filter pretreatment device with added biochar to meet the demand. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an anaerobic filter pretreatment device with added biochar to solve the problem that the water outlet end of the existing water distributor is short and has limited dispersion effect on the discharged water flow.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A biochar-added anaerobic filter pretreatment device comprises an outer shell in a closed barrel-shaped structure, an inner shell colinear with the central axis of the outer shell is arranged inside the outer shell, two ends of the inner shell are sealed with the end walls of the outer shell, and the outer diameter of the inner shell is smaller than the inner diameter of the outer shell; an annular seat and a partition are arranged inside the inner shell in an up-and-down manner, and the inner area of ​​the inner shell is divided into a sedimentation layer, a reaction layer, and a water distribution layer from top to bottom by the annular seat and the partition, and the water distribution layer is filled with sludge; a water distributor is rotatably connected inside the water distribution layer, and a plurality of water spray pipes distributed in an annular array are arranged on the side of the water distributor for injecting sewage; a spiral plate is arranged in a tubular gap between the outer shell and the inner shell, and the spiral plate cooperates with the inner wall of the outer shell and the outer wall of the inner shell to form a spiral channel for conveying circulating heating water.

[0008] Preferably, it also includes a sewage tank, which is connected to the water distributor through a liquid inlet pipe. A peristaltic pump is provided on the liquid inlet pipe body for pumping sewage in the sewage tank to the water distributor.

[0009] Preferably, the water distributor is rotatably connected to the bottom of the housing via a bearing, and the connection is sealed. An internal channel connecting the liquid inlet pipe and the water spray pipe is provided inside the water distributor.

[0010] Preferably, the annular seat is annular in structure, and inner side walls at both upper and lower ends are provided with chamfers that taper toward the middle.

[0011] Preferably, it also includes a three-phase separator, which is arranged at the top of the sedimentation area inside the sewage tank, and a filter screen for filtering sludge is arranged at the bottom of the three-phase separator.

[0012] Preferably, a gas outlet pipe is provided at the top of the three-phase separator, and the gas outlet pipe passes through the top of the shell and is connected to a gas collecting device.

[0013] Preferably, a drain pipe is provided on the side of the three-phase separator, and the drain pipe passes through the side walls of the inner shell and the outer shell in sequence to communicate with the outside of the outer shell.

[0014] Preferably, it also includes a baffle, which is arranged on the inner side wall of the water distribution layer of the sewage tank. A plurality of baffles are provided and distributed in a ring array, and the baffles are in an arc-shaped plate structure.

[0015] Preferably, it also includes a water inlet pipe and a water outlet pipe, the water inlet pipe passes through the outer wall of the shell and is connected to the bottom area of ​​the spiral channel; the water outlet pipe passes through the outer wall of the shell and is connected to the top area of ​​the spiral channel.

[0016] Preferably, the water inlet pipe and the water outlet pipe are both arranged at an angle tangent to the outer wall of the shell, and a heating device is connected between the water inlet pipe and the water outlet pipe for heating the circulating water.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] 1. By setting a rotating water distributor, when water is injected, it will produce self-rotation under the impetus of water flow, thereby improving the water injection dispersion effect and the sewage reaction efficiency.

[0019] 2. By circulating heating water between the outer shell and the inner shell, the internal temperature of the inner shell 9 is kept stable in the range of 35°C ± 2°C, thereby increasing the adsorption efficiency of active substances in the sludge on bacteria in the sewage and improving the reaction rate.

[0020] 3. By adding biochar to the sludge filler, the sludge granulation rate is increased, the sewage purification effect is improved, and the sewage treatment quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the water distributor of the utility model.

[0025] In the figure: 1. outer shell; 2. sewage tank; 3. liquid inlet pipe; 4. peristaltic pump; 5. water inlet pipe; 6. water outlet pipe; 7. liquid discharge pipe; 8. air outlet pipe; 9. inner shell; 10. spiral plate; 11. three-phase separator; 12. annular seat; 13. partition; 14. water distributor; 15. water spray pipe; 16. baffle.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0027] The following is a detailed description of an anaerobic filter pretreatment device with biochar added provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments adopt the best and preferred embodiments. For some known technologies, those skilled in the art may also adopt other alternative methods to implement; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0028] like Figure 1 - Figure 3 As shown, an embodiment of the utility model provides an anaerobic filter pretreatment device with added biochar, including an outer shell 1, which is a closed barrel-shaped structure, an inner shell 9 is provided inside the outer shell 1 and is colinear with the central axis of the outer shell 1, and both ends of the inner shell 9 are sealed and connected to the end walls of the outer shell 1, and the outer diameter of the inner shell 9 is smaller than the inner diameter of the outer shell 1; an annular seat 12 and a partition 13 are arranged inside the inner shell 9 in an up-and-down manner, and the annular seat 12 and the partition 13 are both sealed and connected to the inner wall of the inner shell 9, and the inner area of ​​the inner shell 9 is divided by the annular seat 12 and the partition 13 into a sedimentation layer, a reaction layer, and a water distribution layer from top to bottom, and the water distribution layer is filled with sludge; a water distributor 14 is rotatably connected inside the water distribution layer, and a plurality of water spray pipes 15 distributed in a ring array are provided on the side of the water distributor 14 for injecting sewage; a spiral plate 10 is provided in the tubular gap between the outer shell 1 and the inner shell 9, and the connection is sealed, and the spiral plate 10 cooperates with the inner wall of the outer shell 1 and the outer wall of the inner shell 9 to form a spiral channel for conveying circulating heating water.

[0029] Among them, corn cobs are added to the sludge in the reaction layer as raw materials for preparing biochar, which are crushed to 1 mm, put into a crucible and placed in a muffle furnace for pyrolysis under N2 protection. The heating rate is 10 ° C / min, the pyrolysis temperature is 450 ° C, the pyrolysis time is 1 h, and then the muffle furnace is taken out after naturally cooling to room temperature. A thermometer for real-time monitoring of the internal ambient temperature of the inner shell 9 is also included.

[0030] By setting a rotating water distributor 14 for water injection, self-rotation is generated under the impetus of the water flow during water injection, thereby improving the water injection dispersion effect and the sewage reaction efficiency. By circulating heating water between the outer shell 1 and the inner shell 9, the internal temperature of the inner shell 9 is ensured to be stable in the range of 35°C±2°C, thereby improving the adsorption efficiency of active substances in the sludge on bacteria in the sewage and improving the reaction rate. By adding biochar substances to the sludge filler, the sludge granulation rate is increased, the sewage purification effect is improved, and the sewage treatment quality is improved.

[0031] like Figure 1 As shown, it also includes a sewage tank 2, which is connected to the water distributor 14 through a liquid inlet pipe 3. A peristaltic pump 4 is provided on the liquid inlet pipe 3 to pump the sewage in the sewage tank 2 to the water distributor 14.

[0032] The sewage injection rate is controlled by setting the peristaltic pump 4.

[0033] like Figure 2 As shown, the water distributor 14 is rotatably connected to the bottom of the housing 1 via a bearing, and the connection is sealed. An internal channel connecting the liquid inlet pipe 3 and the water spray pipe 15 is provided inside the water distributor 14.

[0034] The sewage injected through the liquid inlet pipe 3 is uniformly sprayed out from the respective water spray pipes 15 on the side of the water distributor 14 under the diversion effect of the internal channel, thereby ensuring the dispersion effect of the sewage injection.

[0035] like Figure 2 As shown, the annular seat 12 is annular in structure, and the inner side walls at both ends are provided with chamfers which taper toward the middle position, wherein the inclination of the lower chamfer is greater than that of the upper chamfer.

[0036] Through this arrangement, the diameter of the channel between the reaction layer and the sedimentation layer is reduced, thereby preventing the sludge from diffusing into the sedimentation layer under the action of the water flow.

[0037] like Figure 2 As shown, it also includes a three-phase separator 11, which is arranged at the top of the sedimentation area inside the sewage tank 2. A filter screen for filtering sludge is arranged at the bottom of the three-phase separator 11. The pore size of the filter screen is preferably 0.4 mm, which can effectively prevent sludge penetration.

[0038] like Figure 2 As shown, an air outlet pipe 8 is provided on the top of the three-phase separator 11, and the air outlet pipe 8 passes through the top of the outer shell 1 and is connected to a gas collecting device (not shown in the figure); a liquid discharge pipe 7 is provided on the side of the three-phase separator 11, and the liquid discharge pipe 7 passes through the inner shell 9 and the side wall of the outer shell 1 in sequence to connect to the outside of the outer shell 1.

[0039] The gas collecting device is provided to facilitate observation, detection and analysis of the generation of reaction gas.

[0040] like Figure 2 and Figure 3 As shown, it also includes a baffle 16, which is arranged on the inner side wall of the water distribution layer of the sewage tank 2. A plurality of baffles 16 are provided and distributed in a ring array. The baffles 16 are in an arc-shaped plate structure.

[0041] Through this arrangement, when sewage is sprayed out from the water spray pipe 15, it directly collides with the baffle 16, further improving the dispersion efficiency of the injected sewage. Furthermore, by providing the baffle 16 with an arc-shaped plate structure, the water flow sprayed out from the water spray pipe 15 is blocked, providing a greater reverse thrust to drive the water distributor 14 to rotate.

[0042] like Figure 2 As shown, it also includes a water inlet pipe 5 and a water outlet pipe 6. The water inlet pipe 5 passes through the outer wall of the shell 1 and is connected to the bottom area of ​​the spiral channel; the water outlet pipe 6 passes through the outer wall of the shell 1 and is connected to the top area of ​​the spiral channel; the water inlet pipe 5 and the water outlet pipe 6 are both set at an angle tangent to the outer wall of the shell 1, and a heating device (not shown in the figure) is connected between the water inlet pipe 5 and the water outlet pipe 6 for heating circulating water.

[0043] By means of the obliquely arranged water inlet pipe 5 and water outlet pipe 6, the water flow injected and discharged is in the same direction as the water flow in the spiral channel, thereby increasing the circulation speed of the heating water, wherein the power required for the water circulation is provided by a water pump.

[0044] The technical solution provided by the utility model is that in actual use, sewage is pumped by a peristaltic pump 4, transported from the sewage tank 2 to the water distributor 14 through the liquid inlet pipe 3, diverted through the internal channel of the water distributor 14, and sprayed out through multiple water spray pipes 15. The water flow collides with the baffle 16 and disperses. At the same time, under the action of the reverse thrust, the water distributor 14 starts to rotate, thereby improving the dispersion of the injected sewage. At the same time, through the heating equipment and the water pump, the heating water is injected from the water inlet pipe 5, flows through the spiral channel between the outer shell 1 and the inner shell 9, and then flows back to the heating equipment through the water outlet pipe 6 to achieve overall heating of the inner shell 9. The internal temperature of the inner shell 9 is monitored in real time with the thermometer, wherein the thermometer probe is inserted into the middle area of ​​the sludge filler so that the temperature is maintained in the range of 35°C±2°C, thereby improving the adsorption efficiency of the sludge on bacteria in the sewage. After the sewage reacts in the reaction layer, it flows up to the sedimentation layer. The treated water after sedimentation is separated by the three-phase separator 11, and the gas is discharged and collected through the gas outlet pipe 8 for detection and analysis. The treated water is discharged through the drainage pipe 7.

[0045] Among them, biochar prepared from corn cobs was added to the sludge filler. After experiments, the average removal rates of COD and NH4+-N in the reactor with biochar added reached 80% and 73.53%, respectively. The effluent quality of the reactor was stable, indicating that the biochar filler can promote the denitrification performance of the anaerobic ammonia oxidation reactor and stabilize the internal environment of the device. At the same time, after the addition of biochar, it helps to advance the granulation time of the reactor sludge, and the stable mature granular sludge with a particle size between 0.5-2.0 mm increases significantly, indicating that a large number of biochars have a larger surface area and abundant bacterial attachment sites, which is more conducive to sludge granulation. The device also includes a through pipe for replacing the sludge filler.

[0046] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An anaerobic filter pretreatment device with biochar added, characterized in that: include: The outer shell (1) is a closed barrel-shaped structure, wherein an inner shell (9) colinear with the central axis of the outer shell (1) is provided inside the outer shell (1), and both ends of the inner shell (9) are sealedly connected to the end wall of the outer shell (1), and the outer diameter of the inner shell (9) is smaller than the inner diameter of the outer shell (1); The annular seat (12) and the partition (13) are arranged in an up-and-down arrangement inside the inner shell (9); the inner area of ​​the inner shell (9) is divided into a sedimentation layer, a reaction layer, and a water distribution layer from top to bottom by the annular seat (12) and the partition (13); the water distribution layer is filled with sludge; A water distributor (14) is rotatably connected to the inside of the water distribution layer, and a plurality of water spray pipes (15) distributed in a ring array are provided on the side of the water distributor (14) for injecting sewage; The spiral plate (10) is arranged in the tubular gap between the outer shell (1) and the inner shell (9), and the spiral plate (10) cooperates with the inner wall of the outer shell (1) and the outer wall of the inner shell (9) to form a spiral channel for conveying circulating heating water.

2. The anaerobic filter pretreatment device with biochar addition according to claim 1, characterized in that: It also comprises a sewage tank (2) which is connected to the water distributor (14) via a liquid inlet pipe (3); a peristaltic pump (4) is provided on the body of the liquid inlet pipe (3) for pumping sewage in the sewage tank (2) to the water distributor (14).

3. The anaerobic filter pretreatment device with biochar addition according to claim 2, characterized in that: The water distributor (14) is rotatably connected to the bottom of the housing (1) via a bearing, and the connection is sealed. An internal passage connecting the liquid inlet pipe (3) and the water spray pipe (15) is provided inside the water distributor (14).

4. The anaerobic filter pretreatment device with biochar addition according to claim 1, characterized in that: The annular seat (12) is annular in structure, and inner side walls at both ends are provided with chamfered bevels that taper toward the middle.

5. The anaerobic filter pretreatment device with biochar addition according to claim 2, characterized in that: It also comprises a three-phase separator (11), which is arranged at the top of the sedimentation area inside the sewage tank (2), and a filter screen for filtering sludge is arranged at the bottom of the three-phase separator (11).

6. The anaerobic filter pretreatment device with biochar addition according to claim 5, characterized in that: The top of the three-phase separator (11) is provided with an air outlet pipe (8), and the air outlet pipe (8) passes through the top of the shell (1) and is connected to a gas collecting device.

7. The anaerobic filter pretreatment device with biochar addition according to claim 5, characterized in that: A liquid discharge pipe (7) is provided on the side of the three-phase separator (11), and the liquid discharge pipe (7) passes through the side walls of the inner shell (9) and the outer shell (1) in sequence to communicate with the outside of the outer shell (1).

8. The anaerobic filter pretreatment device with biochar addition according to claim 2, characterized in that: It also comprises a baffle (16) arranged on the inner side wall of the water distribution layer of the sewage tank (2); a plurality of baffles (16) are provided and distributed in a ring array; the baffles (16) are in an arc-shaped plate-like structure.

9. The anaerobic filter pretreatment device with biochar addition according to claim 1, characterized in that: It also includes a water inlet pipe (5) and a water outlet pipe (6), The water inlet pipe (5) passes through the outer wall of the housing (1) and is in communication with the bottom area of ​​the spiral channel; The water outlet pipe (6) passes through the outer side wall of the outer shell (1) and is connected to the top area of ​​the spiral channel.

10. The anaerobic filter pretreatment device with biochar addition according to claim 9, characterized in that: The water inlet pipe (5) and the water outlet pipe (6) are both arranged at an angle tangent to the outer wall of the outer shell (1); a heating device is connected between the water inlet pipe (5) and the water outlet pipe (6) for heating circulating water.

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