A device for biological treatment of wastewater from folate production

Abstract

The application discloses a kind of biological treatment devices for folate production wastewater, it is related to sewage treatment technical field.The present application includes the pretreatment unit, anaerobic treatment unit, aerobic treatment unit and advanced treatment unit arranged in sequence;Anaerobic treatment unit includes a tank body, and the exhaust pipe and the gas inlet pipe are communicated on the tank body;Gas inlet pipe is communicated in the gas inlet end of a circulating gas pump, and the gas outlet end of circulating gas pump is communicated with the connecting pipe being arranged in the bottom of tank body by pipeline, and the gas outlet end of connecting pipe is communicated with the aeration module A being arranged in the bottom of tank body.In use, active sludge is laid in the bottom of tank body, and gas in tank body is circulated in its interior by circulating gas pump when anaerobic treatment is controlled.The cooperation of circulating gas pump and aeration module A in anaerobic treatment unit realizes the circulation of gas in tank body, promotes the sufficient contact of active sludge and wastewater, and significantly improves the degradation efficiency of organic matter.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a biological treatment device for wastewater used in folic acid production. Background Art

[0002] Folic acid is widely found in plant leaves. Pure folic acid is a dark yellow or orange crystal that is odorless and tasteless. Currently, folic acid is widely used in feed, food, and medicine.

[0003] The folic acid production process requires a large amount of water as a solvent. Folic acid wastewater is yellow and has a complex composition, primarily containing acids (hydrochloric acid or sulfuric acid), pteridine compounds, pyrimidine, p-aminobenzoylglutamate, sodium chloride, trichloroacetone, and other compounds. This chemical wastewater is characterized by high organic matter concentrations, high chroma, high salinity, and numerous refractory substances. Discharged directly without treatment would have a significant impact on the environment. Summary of the Invention

[0004] The object of the present invention is to provide a biological treatment device for wastewater from folic acid production. By cooperating with a circulating air pump and an aeration module A in an anaerobic treatment unit, gas circulation in the tank is achieved, thereby promoting sufficient contact between activated sludge and wastewater, significantly improving the efficiency of organic matter degradation, and solving the problems raised in the background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention discloses a biological treatment device for wastewater used in folic acid production, comprising a pretreatment unit, an anaerobic treatment unit, an aerobic treatment unit and a deep treatment unit which are arranged in sequence; the anaerobic treatment unit comprises a tank body, which is connected to an exhaust pipe and an air inlet pipe; the air inlet pipe is connected to the air inlet end of a circulating air pump, the air outlet end of the circulating air pump is connected to a connecting pipe arranged at the bottom of the tank body through a pipeline, and the air outlet end of the connecting pipe is connected to an aeration module A arranged at the bottom of the tank body; the bottom of the tank body is connected to a drain pipe with a valve A and a water inlet pipe with a valve B on a side wall of the tank body; the air inlet pipe is provided with a gas sensor, and the tank body is connected to an air pressure sensor; when in use, activated sludge is laid on the bottom of the tank body, and during anaerobic treatment, the circulating air pump is used to control the gas in the tank body to circulate inside the tank.

[0007] Furthermore, the aeration module A is a serpentine coil, and a plurality of exhaust holes are provided on the serpentine coil, and an anti-backflow structure is provided at the exhaust hole; the anti-backflow structure includes a shell fixed at the exhaust hole, the shell is tubular and installed vertically, and a bell mouth with a wide mouth facing upward is installed inside the shell, a porous plate is provided on the top of the shell, and a blocking ball is provided in the area formed by the porous plate, the bell mouth and the shell.

[0008] Furthermore, a flow-blocking mechanism A is provided inside the tank body below the drain pipe; the flow-blocking mechanism A includes a base plate fixed to the inner wall of the tank body, and the base plate is evenly distributed with through holes A; it also includes a motor bracket fixed to the top of the tank body, and a motor is installed on the motor bracket, and the output end of the motor is connected to a rotating rod extending to the tank body through a reducer; an auxiliary frame is installed on the inner wall of the tank body, and the rotating rod passes through the auxiliary frame; the end of the rotating rod is connected to a scraper sliding along the upper surface of the base plate; the aeration module A is located directly below the flow-blocking mechanism A.

[0009] Furthermore, the lower surface of the substrate is connected to a movable frame through a number of elastic telescopic elements, and the upper surface of the movable frame is provided with a blocking column that matches the through hole A one-to-one; the end of the rotating rod is connected to the vertical rod, and the scraper is installed on the vertical rod; the vertical rod passes through the substrate and the movable frame; the substrate is provided with an opening that matches the vertical rod, and the inner wall of the opening is provided with a rubber ring that matches the vertical rod; the end of the vertical rod is connected to the end plate, and at least one convex column is provided on the edge side of the upper surface of the end plate, and a spherical structure is provided at the end of the convex column; the bottom side surface of the movable frame is provided with a boss that matches the rotation path of the convex column, and the end of the boss is formed with a first plane and a second plane with a height difference, and a transition inclined surface is formed between the first plane and the second plane; when the motor is driven to rotate, the spherical structure slides on the first plane, the transition inclined surface and the second plane.

[0010] Furthermore, a sludge discharge pipe is provided on the bottom side of the tank body, and a valve C is provided on the sludge discharge pipe; the end of the exhaust pipe is connected to the bottom of a gas-liquid separation tank, and a first air outlet pipe and a second air outlet pipe are provided on the side wall of the exhaust pipe; and valves D are provided on both the first air outlet pipe and the second air outlet pipe; the outlet ends of the first air outlet pipe and the second air outlet pipe are both connected to the exhaust gas collection device / exhaust gas treatment device.

[0011] Furthermore, the top of the tank body is also provided with a nutrient addition mechanism, which includes a tube body, the tube body being mounted on the top of the tank body, and the bottom end of which extends into the interior of the tank body; a blocking plate being rotatably mounted on the bottom end of the tank body via a rotating shaft, the circumference of the blocking plate being provided with sealing fins that seal with the tube body; hinge seats A and B are respectively provided on the two outer side walls of the tube body, the hinge seat A being hinged with a movable arm, the end of the movable arm being provided with a rectangular notch, the hinge seat B being hinged with a stud, the end of the stud being threadedly connected with a screw head;

[0012] The middle part of the movable arm is hingedly connected with a hinge seat C, the hinge seat C is fixed on the top of the top cover, the circumferential side of the top cover is provided with a sealing structure matched with the port part of the pipe body, at least two guide supports are arranged on the side wall of the pipe body, a T-shaped top rod is arranged on the guide support in a matched mode, a support block for supporting the blocking plate is arranged at the bottom end of the pipe body, and a counterweight is hung on the bottom side of the blocking plate through a connecting rope, and the T-shaped top rod and the support block are respectively located on the two sides of the rotating shaft;

[0013] When the blocking plate is stacked with nutrients, the supporting blocking plate is in a horizontal position and supported on the support block.

[0014] When the top cover is controlled to be closed, the top of the top cover abuts against the top of the T-shaped top rod, thereby driving the supporting blocking plate to rotate and open, and the nutrients stacked on the supporting blocking plate fall from the pipe body into the tank body.

[0015] Further, the aerobic treatment unit comprises a treatment tank, the bottom of the treatment tank is provided with an aeration module B which is the same as the aeration module A, a gas supply pipe which is communicated with the aeration module B is arranged through the outer wall of the treatment tank, the gas supply pipe is connected with a gas supply pump, a discharge pipe is arranged on the top of the treatment tank, a liquid inlet pipe and a liquid outlet pipe are communicated with the side wall of the treatment tank, a sewage discharge pipe is communicated with the bottom of the treatment tank, and valves E are arranged on the discharge pipe, the liquid inlet pipe, the liquid outlet pipe and the sewage discharge pipe.

[0016] Further, a flow resistance mechanism B is arranged inside the treatment tank below the liquid outlet pipe, the flow resistance mechanism B comprises a material guide plate, the bottom end of the material guide plate forms a material discharge port, at least three guide rods are connected between the material guide plate and the inner top side of the treatment tank, a winding motor is installed on the inner top side of the treatment tank through a vertical installation plate, the end of the winding motor is connected with a winding reel, a traction rope is connected on the winding reel, and the end of the traction rope is connected with a sealing plate.

[0017] Further, a heat preservation shell is arranged on the outer circumferential wall of the tank body, a heating cavity is formed between the heat preservation shell and the tank body, a heating assembly is arranged in the heating cavity, a temperature sensor is arranged in the tank body, and the heating assembly and the temperature sensor are connected with a temperature control system.

[0018] Further, the pretreatment unit comprises a stirring tank provided with a discharging pipe at the bottom, and the advanced treatment unit is selected from one or both of a reverse osmosis membrane device and an activated carbon adsorption device.

[0019] The present application has the following beneficial effects:

[0020] The present invention realizes the circulation of gas in the tank body through the cooperation of the circulating air pump and the aeration module A in the anaerobic treatment unit, promotes the full contact between the activated sludge and the wastewater, and significantly improves the degradation efficiency of organic matter.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic structural diagram of the wastewater biological treatment device of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the anaerobic treatment unit of the present invention;

[0025] Figure 3 is a cross-sectional view of the anaerobic treatment unit of the present invention;

[0026] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle part;

[0027] Figure 5 This is a schematic diagram of the anti-backflow structure of the present invention;

[0028] Figure 6 This is a schematic structural diagram of the aerobic treatment unit of the present invention;

[0029] Figure 7 This is a cross-sectional view of the aerobic treatment unit of the present invention;

[0030] Figure 8 For the present invention Figure 7 A partial enlarged view of point B in the middle;

[0031] Figure 9 This is a schematic diagram of the structure of the nutrient addition mechanism of the present invention;

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 1-Pretreatment unit, 2-Anaerobic treatment unit, 3-Aerobic treatment unit, 4-Deep treatment unit,

[0034] 11-shell, 12-bell mouth, 13-porous plate, 14-ball blocking, 2a-aeration module A, 20-tank body, 21-exhaust pipe, 22-inlet pipe, 23-connecting pipe, 24-drain pipe, 25-water inlet pipe, 26-air pressure sensor, 30-treatment tank, 2b-aeration module B, 31-air supply pipe, 32-discharge pipe, 33-liquid inlet pipe, 34-drain pipe, 35-sewage discharge Tube 36-guide plate, 361-discharge port, 38-guide rod, 371-vertical mounting plate, 37-winding motor, 372-traction rope, 39-blocking plate, 390-plate body, 393-protrusion, 392-inclined surface, 394-through hole, 391-connecting arm, 29-blocking mechanism A, 291-base plate, 280-motor bracket, 28-motor, 281-rotating rod, 282-auxiliary frame, 287-scraper, 292-elastic telescopic element, 290-movable frame, 293-blocking column, 283-vertical rod, 284-end plate, 285-convex column, 286-spherical structure, 294-boss, 2941-first plane, 2942-transition inclined surface, 2943-second plane, 27-sludge discharge pipe, 210-gas-liquid separation tank, 211-first air outlet pipe, 2 12-second air outlet pipe, 40-tube body, 421-rotating shaft, 42-blocking plate, 46-hinge seat A, 461-movable arm, 462-rectangular notch, 47-hinge seat B, 471-stud, 472-screw head, 482-hinge seat C, 48-top cover, 481-sealing structure, 44-guide bracket, 45-T-type push rod, 41-support block, 431-connecting rope, 43-counterweight block. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] Example 1: Please refer to Figure 1-7As shown, the present invention is a biological treatment device for wastewater used in folic acid production, comprising a pretreatment unit 1, an anaerobic treatment unit 2, an aerobic treatment unit 3 and a deep treatment unit 4. When in use, the wastewater is pretreated by the pretreatment unit 1, and then the anaerobic treatment unit 2 is used to degrade macromolecular organic matter into small molecular acids; then the aerobic treatment unit 3 is used to remove nitrogen and phosphorus; and finally, the deep treatment unit 4 is used for deep treatment.

[0038] The pretreatment unit 1 includes a stirring tank with a discharge pipe at the bottom; the pretreatment includes using an alkaline agent such as sodium hydroxide for neutralization treatment to adjust the pH value of the wastewater to between 7 and 9; mixing the high-concentration wastewater with the low-concentration wastewater / wastewater treated by the wastewater biological treatment device, and reducing the concentration of the wastewater to a treatable range by dilution.

[0039] The deep treatment unit 4 includes a reverse osmosis membrane device and an activated carbon adsorption device. That is, when in use, the deep treatment includes using the reverse osmosis membrane device for deep treatment to remove trace pollutants, heavy metals and dissolved solids in the wastewater; and then using the activated carbon adsorption device to further remove organic matter, odor and color from the wastewater treated by the reverse osmosis membrane device to obtain clean water and improve water quality; the clean water obtained in this step can be used to dilute high-concentration wastewater.

[0040] It can be known that in the actual treatment process using the anaerobic treatment unit 2, the products of each stage of anaerobic treatment are different; for example, the main products in the fermentation stage are volatile fatty acids, alcohols, lactic acid, carbon dioxide, hydrogen, ammonia, hydrogen sulfide, etc.; in the methanogenesis stage, acetic acid, hydrogen, carbonic acid, formic acid and methanol are converted into methane, carbon dioxide and new cellular substances.

[0041] Based on the above, Figure 2-3 The anaerobic treatment unit 2 provided by the present invention includes a tank body 20, which is connected to an exhaust pipe 21 and an air inlet pipe 22. The air inlet pipe 22 is connected to the air inlet end of a circulating air pump, and the air outlet end of the circulating air pump is connected to a connecting pipe 23 provided at the bottom of the tank body 20 through a pipeline. The air outlet end of the connecting pipe 23 is connected to an aeration module A2a provided at the bottom of the tank body 20. The bottom of the tank body 20 is connected to a drain pipe 24 provided with a valve A, and a side wall of the tank body 20 is connected to a water inlet pipe 25 provided with a valve B. A gas sensor is provided on the air inlet pipe 22, and an air pressure sensor 26 is provided on the tank body 20. During use, the gas sensor is provided to detect the methane and carbon dioxide contents in the gas inside the tank body 20, thereby detecting the stage of the anaerobic reaction. When the gas sensor detects the presence of methane in the tank body 20, it indicates that the methane production stage has begun. When the gas sensor detects a high carbon dioxide concentration in the tank body 20 and no methane is detected, it indicates that the fermentation stage has begun.

[0042] Furthermore, based on the setting of the above-mentioned gas sensor, when the present invention is in use, when it is in the methane production stage, due to the increase of gas inside the tank body 20, the internal air pressure of the tank body 20 is measured by the air pressure sensor 26. When the internal air pressure of the tank body 20 is greater than the preset value, the exhaust pipe 21 is controlled to be connected, and the gas in the tank body 20 is discharged for collection or treatment.

[0043] Specifically, the end of the exhaust pipe 21 is connected to the bottom of a gas-liquid separation tank 210, and a first gas outlet pipe 211 and a second gas outlet pipe 212 are provided on the side wall of the exhaust pipe 21; and valves D are provided on the first gas outlet pipe 211 and the second gas outlet pipe 212; and then when in use, the gas is discharged from the tank body 20 through the first gas outlet pipe 211 or the second gas outlet pipe 212 according to actual needs; and when in use, gas-liquid separation is performed through the gas-liquid separation tank 210 to prevent moisture contained in the air flow from being discharged from the tank body 20.

[0044] Specifically, in order to facilitate the treatment of the gas discharged from the tank body 20 during use, the outlet ends of the first outlet pipe 211 and the second outlet pipe 212 are both connected to the exhaust gas treatment device;

[0045] Or in order to facilitate the collection of the gas exhausted from the tank body 20, the exhaust ends of the first exhaust pipe 211 and the second exhaust pipe 212 are both connected to the exhaust gas collection device;

[0046] Or it is convenient to process the gas produced in the fermentation stage and collect the gas produced in the methanogenesis stage. At this time, the outlet ends of the first outlet pipe 211 and the second outlet pipe 212 are respectively connected to the waste gas collection device and the waste gas treatment device.

[0047] During use, in order to conveniently reduce the dissolved oxygen content in the sewage in the tank body 20 and improve the treatment effect, the present invention adopts an activated sludge method in the anaerobic treatment stage, that is, during operation, activated sludge is laid on the bottom of the tank body 20, and the gas in the tank body 20 is controlled to circulate inside it by a circulating air pump during anaerobic treatment; that is, the circulating air pump is used to transport part of the gas on the tank body 20 to the aeration module A2a, and the exhaust is driven by the aeration module A2a to drive the activated sludge in the tank body 20 to mix evenly with the sewage in the tank body 20, thereby improving the treatment effect.

[0048] Example 2, based on Example 1, after the anaerobic treatment stage is completed, sludge will be generated in the sewage due to the reaction, and the added activated sludge is prevented from being discharged from the tank body 20. After the anaerobic treatment, the tank body 20 is controlled to stand for a period of time, and then the drain pipe 24 is opened to discharge the sewage in the tank body 20, in order to prevent the sludge at the bottom of the tank body 20 from being carried up by the water flow during the sewage discharge process and discharged from the drain pipe 24; Figure 3-4The present invention sets a flow blocking mechanism A29 inside the tank body 20 located below the drain pipe 24; the flow blocking mechanism A29 includes a base plate 291 fixed to the inner wall of the tank body 20, the base plate 291 is uniformly provided with through holes A, and further includes a motor bracket 280 fixed to the top of the tank body 20, the motor bracket 280 is mounted with a motor 28, the output end of the motor 28 is connected to a rotating rod 281 extending to the tank body 20 through a reducer; an auxiliary frame 282 is installed on the inner wall of the tank body 20, and the rotating rod 281 penetrates the auxiliary frame 282; the end of the rotating rod 281 is connected to a scraper 287 that slides along the upper surface of the base plate 291; the aeration module A2a is located directly below the flow blocking mechanism A29; that is, when the initial stillness is completed, the scraper 287 is driven by the control motor 28 to rotate several times, and then the stillness is performed for the second time; then the scraper 287 is driven by the control motor 28 to rotate several times, and then the stillness is performed for the third time; repeat the above operation multiple times to clean the sludge on the upper surface of the base plate 291 to the bottom of the base plate 291 as much as possible.

[0049] At the same time, the lower surface of the substrate 291 of the present invention is connected to the movable frame 290 through a number of elastic telescopic elements 292, and the upper surface of the movable frame 290 is provided with a blocking column 293 that matches the through hole A one by one; the end of the rotating rod 281 is connected to the vertical rod 283, and the scraper 287 is installed on the vertical rod 283; the vertical rod 283 passes through the substrate 291 and the movable frame 290; an opening that matches the vertical rod 283 is provided on the substrate 291, and a rubber ring that matches the vertical rod 283 is provided on the inner wall of the opening; the end of the vertical rod 283 is connected to the end plate 284, and at least one boss 285 is provided on the edge side of the upper surface of the end plate 284, and a spherical structure 286 is provided at the end of the boss 285; the bottom side surface of the movable frame 290 is provided with a boss 294 that matches the rotation path of the boss 285, and the end of the boss 294 is formed with a first plane 2941 and a second plane 2943 with a height difference. A transition slope 2942 is formed between a plane 2941 and a second plane 2943; when the driving motor 28 rotates, the spherical structure 286 slides on the first plane 2941, the transition slope 2942 and the second plane 2943, that is, when in use, by controlling the rotation of the motor 28 and utilizing the cooperation of the boss 294 and the boss 285, the movable frame 290 is controlled to move up and down along with the rotation of the motor 28; when the movable frame 290 moves upward, the blocking column 293 is inserted into the through hole A of the substrate 291, and the blockage is closed at this time; when the movable frame 290 moves downward, the blocking column 293 is pulled out from the through hole A of the substrate 291, and the blockage is conducted at this time; at the same time, the flow mechanism A drives the scraper 287 through the motor 28 to clean the surface of the substrate 291, and cooperates with the elastic telescopic structure of the movable frame 290 and the blocking column 293 to periodically clear the through hole A to avoid sludge compaction and ensure the passage of water and gas.

[0050] Based on the above, when it is necessary to discharge the sewage in the tank body 20 through the drain pipe 24, the control motor 28 rotates to control the movable frame 290 to move upward until the blocking column 293 is inserted into the through hole A of the base plate 291, thereby preventing the water flow from the drain pipe 24 from causing the sludge at the bottom of the tank body 20 to be lifted up when draining.

[0051] Specifically, a sludge discharge pipe 27 is provided in communication with the bottom side of the tank body 20 , and a valve C is provided on the sludge discharge pipe 27 .

[0052] Example 3, the aeration module A2a provided by the present invention is a serpentine coil, and the serpentine coil is provided with a plurality of exhaust holes, and the exhaust holes are provided with an anti-backflow structure; Figure 5 The anti-backflow structure includes a shell 11 fixed at the exhaust hole. The shell 11 is tubular and installed vertically. A bell mouth 12 with a wide mouth facing upward is installed inside the shell 11. A porous plate 13 is set on the top of the shell 11. A blocking ball 14 is set in the area formed by the porous plate 13, the bell mouth 12 and the shell 11. When the circulating air pump is used to transport part of the gas on the tank body 20 to the aeration module A2a, the blocking ball 14 is driven to separate from the porous plate 13 under the action of the airflow. At this time, the gas is discharged through the shell 11 and the porous plate 13, effectively preventing sludge from backflowing and clogging the exhaust hole.

[0053] Example 4. Based on Example 1, compared with aerobic treatment, anaerobic treatment converts organic matter into methane, hydrogen, carbon dioxide, thiols, etc., the products are complex, and the treated effluent has an odor; and sufficient nitrogen and phosphorus are required during the anaerobic treatment process to support the growth and metabolism of microorganisms; based on the nitrogen and phosphorus requirements, the present invention also provides a nutrient addition mechanism at the top of the tank body 20, that is, when in use, nutrients are added to the tank body 20 as needed according to the stage of the anaerobic reaction.

[0054] Based on this, Figure 9The nutrient adding mechanism provided includes a tube body 40, which is installed on the top of the tank body 20, and the bottom end of which extends to the interior of the tank body 20; and in order to prevent a large amount of gas from escaping from the tube body 40 to the environment during the nutrient addition process, the present invention has a blocking plate 42 rotatably installed at the bottom end of the tank body 20 through a rotating shaft 421, and a sealing fin is provided on the circumference of the blocking plate 42 to seal with the tube body 40; hinge seats A46 and hinge seats B47 are respectively provided on the two outer side walls of the tube body 40, and a movable arm 461 is hinged on the hinge seat A46, and a rectangular notch 462 is provided at the end of the movable arm 461, and a hinge seat B47 is hinged on the hinge seat There is a stud 471, and the end of the stud 471 is threadedly connected to a screw head 472; the middle part of the movable arm 461 is hinged with a hinge seat C482, and the hinge seat C482 is fixed to the top of the top cover 48, and the circumference of the top cover 48 is provided with a sealing structure 481 that seals with the end part of the tube body 40; at least two guide brackets 44 are provided on the side wall of the tube body 40, and the guide bracket 44 is provided with a T-shaped push rod 45; the bottom end of the tube body 40 is provided with a support block 41 for supporting the blocking plate 42, and a counterweight block 43 is hung on the bottom side of the blocking plate 42 through a connecting rope 431; the T-shaped push rod 45 and the support block 41 are respectively located on both sides of the rotating shaft 421.

[0055] Based on the above arrangement, when the top cover 48 is opened, the blocking plate 42 is controlled to flip along the rotation axis 421 to a horizontal position under the action of the counterweight 43. At this time, the blocking plate 42 and the tube body 40 cooperate to form a seal.

[0056] When nutrients are stacked on the blocking plate 42, the blocking plate 42 is in a horizontal position and supported on the support block 41. At this time, the blocking plate 42 and the tube body 40 cooperate to form a seal.

[0057] When the top cover 48 is controlled to be closed, the top of the top cover 48 abuts against the top of the T-shaped top rod 45, thereby driving the support baffle 42 to rotate and open. At this time, the nutrients stacked on the support baffle 42 fall from the tube body 40 into the tank body 20.

[0058] That is, the nutrient adding mechanism adopts a structure in which the top cover 48 is linked with the T-shaped top rod 45, and the blocking plate 42 is automatically opened to add nutrients in a closed state, thereby avoiding gas leakage during manual operation.

[0059] Example 5, as Figure 6-8The aerobic treatment unit 3 includes a treatment tank 30, and an aeration module B2b with the same structure as the aeration module A2a is provided at the bottom of the treatment tank 30; an air supply pipe 31 connected to the aeration module B2b is provided on the outer wall of the treatment tank 30, and the air supply pipe 31 is connected to the air supply pump; a discharge pipe 32 is provided on the top of the treatment tank 30; a liquid inlet pipe 33 and a liquid discharge pipe 34 are connected to the side wall of the treatment tank 30; the bottom of the treatment tank 30 is connected to a sewage pipe 35, and valves E are provided on the discharge pipe 32, the liquid inlet pipe 33, the liquid discharge pipe 34 and the sewage pipe 35.

[0060] Similarly, in order to avoid discharging sewage through the drain pipe 34 during use and to prevent the sludge at the bottom of the treatment tank 30 from being lifted up by the water flow, a flow blocking mechanism B is provided inside the treatment tank 30 located below the drain pipe 34; the flow blocking mechanism B includes a guide plate 36, a discharge port 361 is formed at the bottom end of the guide plate 36; at least three guide rods 38 are connected between the guide plate 36 and the top side surface of the treatment tank 30, a winding motor 37 is installed on the top side surface of the treatment tank 30 through a vertical mounting plate 371, the end of the winding motor 37 is connected to a reel, a traction rope 372 is connected to the reel, and the end of the traction rope 372 is connected to a blocking plate 39; the blocking plate The plate 39 includes a plate body 390, and a protrusion 393 that passes through the discharge port 361 is provided on one side of the plate body 390, and an inclined surface 392 that cooperates with the guide plate 36 is formed between the protrusion 393 and the plate body 390; a connecting arm 391 is provided on the peripheral side of the plate body 390, and the guide rod 38 guides and passes through the connecting arm 391; that is, when sewage is discharged through the drainage pipe 34, the winding motor 37 is controlled to rotate, and then the sealing plate 39 is controlled to move from top to bottom, and then the sealing plate 39 is used to control the guide plate 36 to prevent the water flow from driving the sludge under the guide plate 36 to be lifted up during drainage; and the guide plate 36 is installed below the drainage pipe 34.

[0061] In order to facilitate the control of the upward and downward movement of the sealing plate 39, a through hole B394 is provided on the protrusion 393, which penetrates the plate body 390 and the diameter of which gradually decreases from top to bottom, and a columnar sealing head 363 that cooperates with the through hole B394 is fixed at the discharge port 361 through a metal mesh; that is, when the sealing plate 39 is controlled to move downward and supported on the guide plate 36, the columnar sealing head 363 is inserted into the through hole B394 to form a flow cutoff.

[0062] It can be known that in order to control the environment of the anaerobic treatment stage during use, an insulating shell is provided on the outer peripheral side wall of the tank body 20, and a heating chamber is formed between the insulating shell and the tank body 20. A heating component is provided in the heating chamber, and a temperature sensor is provided in the tank body 20. The heating component and the temperature sensor are both connected to the temperature control system; and combined with the linkage control of the gas sensor and the air pressure sensor 26, the air pressure and temperature in the tank 20 are ensured to be stable, thereby maintaining the optimal anaerobic environment.

[0063] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0064] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A biological treatment device for wastewater from folic acid production, characterized by: It comprises a pretreatment unit (1), an anaerobic treatment unit (2), an aerobic treatment unit (3) and a deep treatment unit (4) which are arranged in sequence; The anaerobic treatment unit (2) comprises a tank body (20), and the tank body (20) is connected to an exhaust pipe (21) and an air inlet pipe (22); The air inlet pipe (22) is connected to the air inlet end of a circulating air pump, and the air outlet end of the circulating air pump is connected to a connecting pipe (23) provided at the bottom of the tank body (20) through a pipeline, and the air outlet end of the connecting pipe (23) is connected to an aeration module A (2a) provided at the bottom of the tank body (20); The bottom of the tank body (20) is connected to a drain pipe (24) provided with a valve A, and a side wall of the tank body (20) is connected to a water inlet pipe (25) provided with a valve B; A gas sensor is provided on the air inlet pipe (22), and an air pressure sensor (26) is provided in communication with the tank body (20); When in use, activated sludge is laid at the bottom of the tank body (20), and during anaerobic treatment, the gas in the tank body (20) is controlled to circulate inside the tank body through a circulating air pump; the aeration module A (2a) is a serpentine coil, and a plurality of exhaust holes are provided on the serpentine coil, and an anti-backflow structure is provided at the exhaust hole; The anti-backflow structure comprises a shell (11) fixed at the exhaust hole, the shell (11) being tubular and vertically installed, a bell mouth (12) with a wide end facing upwards installed inside the shell (11), a porous plate (13) being arranged on the top of the shell (11), and a blocking ball (14) being arranged in the area formed by the porous plate (13), the bell mouth (12) and the shell (11); a flow blocking mechanism A (29) being arranged inside the tank body (20) located below the drain pipe (24); The flow blocking mechanism A (29) comprises a base plate (291) fixed to the inner wall of the tank body (20), and the base plate (291) is uniformly provided with through holes A; It also includes a motor bracket (280) fixed to the top of the tank body (20), a motor (28) is mounted on the motor bracket (280), and an output end of the motor (28) is connected to a rotating rod (281) extending to the tank body (20) through a reducer; An auxiliary frame (282) is installed on the inner wall of the tank body (20), and the rotating rod (281) passes through the auxiliary frame (282); The end of the rotating rod (281) is connected to a scraper (287) that slides along the upper surface of the base plate (291); The aeration module A (2a) is located directly below the flow blocking mechanism A (29); the lower surface of the base plate (291) is connected to a movable frame (290) via a plurality of elastic telescopic elements (292); the upper surface of the movable frame (290) is provided with blocking columns (293) that match the through holes A one-to-one; The end of the rotating rod (281) is connected to the vertical rod (283), and the scraper (287) is installed on the vertical rod (283); The vertical rod (283) passes through the base plate (291) and the movable frame (290); an opening is provided on the base plate (291) to cooperate with the vertical rod (283), and a rubber ring is provided on the inner wall of the opening to cooperate with the vertical rod (283); The end of the vertical rod (283) is connected to the end plate (284), at least one convex column (285) is provided on the edge side of the upper surface of the end plate (284), and a spherical structure (286) is provided at the end of the convex column (285); The bottom side of the movable frame (290) is provided with a boss (294) that matches the rotation path of the boss (285); the end of the boss (294) is formed with a first plane (2941) and a second plane (2943) with a height difference; a transition slope (2942) is formed between the first plane (2941) and the second plane (2943); When the motor (28) is driven to rotate, the spherical structure (286) slides on the first plane (2941), the transition slope (2942) and the second plane (2943).

2. A biological treatment device for folic acid production wastewater according to claim 1, characterized in that: The bottom side of the tank body (20) is connected to a sludge discharge pipe (27), and a valve C is provided on the sludge discharge pipe (27); The end of the exhaust pipe (21) is connected to the bottom of a gas-liquid separation tank (210), and a first gas outlet pipe (211) and a second gas outlet pipe (212) are provided on the side wall of the exhaust pipe (21); Furthermore, valves D are provided on both the first air outlet pipe (211) and the second air outlet pipe (212); The outlet ends of the first outlet pipe (211) and the second outlet pipe (212) are both connected to an exhaust gas collection device / exhaust gas treatment device.

3. The biological treatment device for folic acid production wastewater according to claim 1, characterized in that: The top of the tank body (20) is also provided with a nutrient adding mechanism, which includes a tube body (40), the tube body (40) being mounted on the top of the tank body (20) and having its bottom end extending into the interior of the tank body (20); a blocking plate (42) is rotatably mounted on the bottom end of the tank body (20) via a rotating shaft (421), and a sealing fin is provided on the circumference of the blocking plate (42) for sealingly cooperating with the tube body (40); A hinge seat A (46) and a hinge seat B (47) are respectively provided on the two outer side walls of the tube body (40); a movable arm (461) is hingedly connected to the hinge seat A (46); a rectangular notch (462) is provided at the end of the movable arm (461); a stud (471) is hingedly connected to the hinge seat B (47); a screw head (472) is threadedly connected to the end of the stud (471); The middle portion of the movable arm (461) is hinged with a hinge seat C (482), the hinge seat C (482) is fixed to the top of the top cover (48), and a sealing structure (481) is provided on the circumference of the top cover (48) for sealing with the end portion of the tube body (40); At least two guide brackets (44) are provided on the side wall of the tube body (40), and a T-shaped push rod (45) is provided on the guide bracket (44); The bottom end of the tube body (40) is provided with a support block (41) for supporting the blocking plate (42), and a counterweight block (43) is hung on the bottom side of the blocking plate (42) via a connecting rope (431); The T-shaped push rod (45) and the support block (41) are respectively located on both sides of the rotating shaft (421); When nutrients are stacked on the blocking plate (42), the supporting blocking plate (42) is in a horizontal position, and the supporting blocking plate (42) is supported on the supporting block (41); When the top cover (48) is controlled to be closed, the top of the top cover (48) abuts against the top of the T-shaped top rod (45), thereby driving the support plate (42) to rotate and open. At this time, the nutrients stacked on the support plate (42) fall from the tube body (40) into the tank body (20).

4. The biological treatment device for folic acid production wastewater according to claim 1, characterized in that: The aerobic treatment unit (3) comprises a treatment tank (30), and an aeration module B (2b) having the same structure as the aeration module A (2a) is provided at the bottom of the treatment tank (30); An air supply pipe (31) connected to the aeration module B (2b) is provided through the outer wall of the treatment tank (30), and the air supply pipe (31) is connected to the air supply pump; A discharge pipe (32) is provided on the top of the treatment tank (30); A liquid inlet pipe (33) and a liquid discharge pipe (34) are connected to the side wall of the treatment tank (30); The bottom of the treatment tank (30) is connected to a sewage pipe (35), and valves E are provided on the discharge pipe (32), the liquid inlet pipe (33), the liquid discharge pipe (34) and the sewage pipe (35).

5. A biological treatment device for folic acid production wastewater according to claim 4, characterized in that: A flow blocking mechanism B is provided inside the processing tank (30) located below the drainage pipe (34); The flow blocking mechanism B comprises a material guide plate (36), and a material discharge port (361) is formed at the bottom end of the material guide plate (36); At least three guide rods (38) are connected between the guide plate (36) and the inner top side surface of the processing tank (30); a winding motor (37) is installed on the inner top side surface of the processing tank (30) via a vertical mounting plate (371); an end of the winding motor (37) is connected to a reel; a traction rope (372) is connected to the reel; and an end of the traction rope (372) is connected to a blocking plate (39); The blocking plate (39) includes a plate body (390), one side of the plate body (390) is provided with a protrusion (393) that passes through the discharge port (361), and an inclined surface (392) that cooperates with the guide plate (36) is formed between the protrusion (393) and the plate body (390); The protruding portion (393) is provided with a through hole B (394) that penetrates the plate body (390) and has a diameter that gradually decreases from top to bottom. A connecting arm (391) is provided on the peripheral side of the plate body (390), and the guide rod (38) guides and penetrates the connecting arm (391).

6. The biological treatment device for folic acid production wastewater according to claim 1, characterized in that: A heat-insulating shell is provided on the outer peripheral side wall of the tank body (20), a heating cavity is formed between the heat-insulating shell and the tank body (20), a heating component is provided in the heating cavity, a temperature sensor is provided in the tank body (20), and both the heating component and the temperature sensor are connected to a temperature control system.

7. The biological treatment device for folic acid production wastewater according to claim 1, characterized in that: The pretreatment unit (1) comprises a stirring tank with a discharge pipe provided at the bottom, and the deep treatment unit (4) is selected from one or both of a reverse osmosis membrane device and an activated carbon adsorption device.

Images