A treatment system for denitration catalyst production wastewater

Abstract

The present invention provides a treatment system for wastewater produced by denitration catalysts, and belongs to the field of sludge treatment equipment. It solves the problem that the current plate-and-frame filter press is intermittent filtering, and needs to be shut down for unloading and cleaning after each filtration, resulting in a long filtration cycle, low efficiency, and the filter cloth in the plate-and-frame filter press is easily worn and damaged during long-term use, and needs to be replaced regularly, which increases the operating cost. A treatment system for wastewater produced by denitration catalysts, including a pretreatment device, the pretreatment device includes a pre-compression mechanism and a pushing mechanism, the pre-compression mechanism can compress the sludge into mud bricks, and the pushing mechanism automatically discharges the mud bricks. The subsequent re-compression device further compresses the mud bricks and delivers the mud bricks through a conveyor belt. It has the advantages of automatic unloading after each filtration, high efficiency, and no need to use filter cloth, thereby reducing the operating cost of the system.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment equipment, in particular to a treatment system for denitration catalyst production wastewater. Background Art

[0002] After a series of treatment processes (such as pretreatment, biochemical treatment, etc.) are carried out on the wastewater produced by the denitrification catalyst, a certain amount of sludge will be produced. These sludges contain a large amount of water and organic matter, and are bulky, making them difficult to directly treat or dispose of. Therefore, it is necessary to use sludge treatment processes to reduce their moisture content and volume. In the sludge treatment process, commonly used methods include concentration, stabilization, conditioning, dehydration, etc. Among them, dehydration is one of the key steps to reduce the volume of sludge. The moisture content of the dehydrated sludge is significantly reduced, forming a relatively compact mud brick or mud cake. These mud bricks or mud cakes are not only easy to transport and store, but can also be used for subsequent resource utilization or harmless disposal as needed.

[0003] In the process of treating sludge at the end of traditional wastewater treatment, a plate and frame filter press is used. The current plate and frame filter press is an intermittent filtration, and needs to be stopped for unloading and cleaning after each filtration, resulting in a long filtration cycle and relatively low efficiency. Secondly, the filter cloth in the plate and frame filter press is prone to wear and damage during long-term use, and needs to be replaced regularly, which increases the operating cost of the entire system. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a treatment system for denitration catalyst production wastewater, which has the advantages of automatic unloading after each filtration, high efficiency, and no need to use filter cloth, which reduces the operating cost of the system. It solves the problem that the current plate-and-frame filter press is intermittent filtration, and needs to be shut down for unloading and cleaning after each filtration, resulting in a long filtration cycle and relatively low efficiency. Secondly, the filter cloth in the plate-and-frame filter press is easily worn and damaged during long-term use, and needs to be replaced regularly, which increases the operating cost.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned automatic unloading after each filter press, high efficiency and no need to use filter cloth, and reduce the purpose of the operation cost of the system, the present invention provides the following technical solutions: a treatment system for denitration catalyst production wastewater, comprising a sewage treatment tank, a biochemical treatment tank, a catalytic oxidation tank, a sedimentation tank, a sludge contact reactor, a sludge concentration tank and a filter press device connected in sequence, the filter press device is connected to a filtrate delivery pipe for conveying filtrate to the sewage treatment tank, the sedimentation tank is connected to a sludge delivery pipe for conveying sludge to the sludge concentration tank, and the filter press device includes a pretreatment device;

[0008] The pre-treatment device comprises a pre-compression mechanism and a material pushing mechanism;

[0009] The pre-compression mechanism also includes a fixed block, a support and limit rod and a bottom plate, the top of the fixed block is provided with a connecting port, the connecting port is connected to a discharge port, the bottom of the fixed block is provided with a protrusion, a compression frame is slidably provided on the support and limit rod, the compression frame is provided with a accommodating cavity, the sludge flows through the discharge port through the connecting port and enters the accommodating cavity, a cam mechanism is also provided below the bottom plate, the cam mechanism includes a transmission shaft and a motor 1, the cam mechanism drives the compression frame to reciprocate between the fixed block and the bottom plate, when the compression frame moves toward the fixed block, the accommodating cavity and the protrusion squeeze each other so that the sludge is compressed into a mud brick;

[0010] The bottom plate is also provided with a push rod extending from the bottom of the compression frame into the accommodating cavity, and a top plate is provided on the top of the push rod. When the sludge is compressed, the compression frame descends, and the top plate on the push rod pushes the mud bricks in the accommodating cavity upwards;

[0011] The pushing mechanism includes a screw, a spline shaft and a lever arranged between a fixed block and a base plate. The compression frame is slidably connected to the screw and the spline shaft. The screw is provided with a variable pitch spiral groove and a second mating tooth. The compression frame is provided with a shifting slider mating with the variable pitch spiral groove. When the compression frame moves, the screw is driven to rotate. The spline shaft is provided with a first mating tooth. The second mating tooth is meshed with the first mating tooth. The lever is fixedly connected to the spline shaft. The spline shaft drives the lever to rotate to push the compressed mud bricks out of the top of the compression frame.

[0012] Preferably, a shell is provided on the outside of the pre-compression mechanism, a fixing frame is provided at the bottom of the base plate, the fixing frame is fixedly provided on the shell, a bracket 1 is also provided inside the shell, the bracket 1 is located above the fixing block and fixedly connected to the fixing block, and the shell is also provided with a conveying port.

[0013] Preferably, the screw rod and the spline shaft are provided in two groups, which are respectively located on both sides of the compression frame.

[0014] Preferably, the pretreatment device also includes a locking mechanism, which includes an articulated seat 2, which is arranged on a side of the compression frame close to the spline shaft, and an articulated seat 1 is arranged on a side of the fixed block close to the spline shaft. One end of a rocker arm is hinged on the articulated seat 2, a slide groove is arranged in the middle of the rocker arm, and the articulated seat 1 is installed in the slide groove. One end of a baffle is also rotatably arranged in the slide groove, and the baffle is inserted into the connecting port. A feed port is arranged on the baffle. When the compression frame drops to the lowest point, the rocker arm swings inward to push the baffle inward, so that the feed port on the baffle is connected to the connecting port.

[0015] Preferably, the cam mechanism includes a transmission shaft and a motor 1, cams are arranged on both sides of the transmission shaft, the cams are in contact with the bottom of both sides of the compression frame, the two ends of the transmission shaft are arranged on the shell, a transmission gear 2 is arranged on the transmission shaft, the motor 1 is fixedly installed on the bottom of the base plate, and a transmission gear 1 is arranged on the motor 1, and the transmission gear 1 and the transmission gear 2 are meshed with each other.

[0016] Preferably, a protrusion is provided at the bottom of the fixing block, and the shape and size of the protrusion are the same as the accommodating cavity of the compression frame.

[0017] Preferably, a recompression device is further provided outside the pretreatment device, the recompression device includes a conveying mechanism, the conveying mechanism includes a second bracket, a conveyor belt is provided on the upper part of the second bracket, the conveyor belt is close to the conveying port, and the conveyor belt is used to receive the mud bricks sent out from the conveying port;

[0018] A power mechanism is also provided on the side of the second bracket, and the power mechanism includes a second motor, and the second motor is connected to a gear box. A rack push rod is provided in the gear box, and the rack push rod passes through the gear box. A compression block is provided at the bottom of the rack push rod.

[0019] Preferably, the gearbox includes a driving shaft, which is connected to motor 2, and a driving gear and a half gear 1 are provided on the driving shaft. The gearbox also includes a driven shaft and an output shaft, and the two ends of the driven shaft and the output shaft are respectively connected to the housing of the gearbox, and a driven gear and a half gear 2 are provided on the driven shaft, and the driven gear and the driving gear are meshed with each other. An output gear 1 and an output gear 2 are provided on the output shaft, and the output gear 1 is alternately meshed with the half gear 1 and the half gear 2 respectively, and the output gear 2 is meshed with the rack push rod.

[0020] Preferably, a slide bar is slidably provided on the compression block, a positioning block is fixedly provided at the bottom of the slide bar, and a spring is further provided on the slide bar, and the spring is located between the compression block and the positioning block.

[0021] Preferably, a positioning groove is provided in the middle of the positioning block, and the size and shape of the positioning groove are the same as those of the mud brick.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a treatment system for denitration catalyst production wastewater, which has the following beneficial effects:

[0024] The treatment system of the denitration catalyst production wastewater. First, the sewage is collected in a collection tank, and then the sewage is discharged into a biochemical treatment tank. The microorganisms in the biochemical treatment tank can convert ammonia nitrogen into nitrates through the nitrification-denitrification process, and then further reduce it to nitrogen gas, thereby effectively removing ammonia nitrogen in the wastewater. Secondly, the microorganisms in the biochemical treatment tank can degrade organic pollutants in the wastewater and convert them into harmless substances such as carbon dioxide and water. The treated sewage is then discharged into a catalytic oxidation tank. The catalytic oxidation process can decompose the difficult-to-degrade organic matter in the wastewater and convert it into easily biodegradable substances. The sewage is then discharged into a sedimentation tank to precipitate the solid particles therein. After the precipitation is completed, the supernatant therein is discharged into a sludge contact reactor, and the unsettled sludge therein is granulated to further purify the sewage, and then the sludge in the sedimentation tank and the sludge contact reactor is transferred to a sludge thickening tank. Finally, the sludge in the sludge thickening tank is discharged into a filter press device to process the sludge into mud bricks.

[0025] First, put the sludge into the pre-compression mechanism from the discharge port, and the sludge falls into the accommodating chamber of the compression frame along the pipe connection port. During the process of the sludge falling into the accommodating chamber, the cam rotates to drive the compression frame to move upward. During the upward movement of the compression frame, the accommodating chamber is gradually filled with sludge, and the compression frame drives the screw to rotate counterclockwise, thereby causing the spline shaft to rotate clockwise, further causing the lever to rotate from inside to outside, preventing the lever from interfering with the pressing between the compression frame and the fixed block. When the compression frame rises to the top, the articulated seat 2 and the articulated seat 1 cause the swing arm to swing outward, pulling the baffle outward, so that the connection port is blocked by the baffle, and the sludge in the discharge port no longer falls. When the compression frame rises to the top, the protrusion at the bottom of the fixed block is pressed into the accommodating chamber, and the sludge therein is compressed into a mud brick. After the compression is completed, the compression frame descends under the action of the cam. At this time, the top plate on the push rod pushes the compressed mud brick upward from the bottom of the accommodating cavity, and during the descent of the compression frame, the compression frame drives the screw to rotate clockwise, so that the spline shaft rotates counterclockwise, and further rotates the lever from outside to inside, pushing the pushed mud brick forward, so that the mud brick slides into the conveying port, and then the mud brick enters the re-compression device. During the descent of the compression frame, the hinge seat 2 and the hinge seat 1 drive the swing rod to swing inward, so that the feed port and the connection port are connected again, and the sludge continues to fall into the accommodating cavity. The cycle repeats.

[0026] When the mud bricks enter the conveyor belt of the re-compression device from the conveying port, the conveyor belt transports the mud bricks to the bottom of the positioning block. Motor 2 drives the drive shaft to rotate clockwise, and at this time, the half gear 1 on the drive shaft rotates clockwise, and the driving gear on the drive shaft drives the driven gear to rotate counterclockwise, thereby driving the half gear 2 to rotate counterclockwise. Since the output gear 1 is installed between the half gear 1 and the half gear 2. When the half gear 1 is meshed with the output gear 1, the half gear 2 is not meshed with the output gear 1. At this time, the output gear 1 rotates counterclockwise, driving the output gear 2 to rotate counterclockwise, and finally the rack push rod descends. Conversely, when the half gear 2 is meshed with the output gear 1, the half gear 1 is not meshed with the output gear 1. At this time, the output gear 1 rotates clockwise, driving the output gear 2 to rotate clockwise, and finally the rack push rod rises. The rise and fall of the rack push rod drives the rise and fall of the compression block and the positioning block, thereby realizing further compression and unloading of the mud bricks.

[0027] Thereby achieving the effect of automatic unloading after each filtration, high efficiency and no need to use filter cloth, thus reducing the operating cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a treatment system for denitration catalyst production wastewater according to the present invention;

[0029] Figure 2 A treatment system for denitration catalyst production wastewater of the present invention is a treatment flow chart of denitration catalyst production wastewater;

[0030] Figure 3 This is a schematic structural diagram of a filter press device for treating wastewater from the production of a denitration catalyst according to the present invention;

[0031] Figure 4 It is a partial cross-sectional view of a pretreatment device of a treatment system for denitration catalyst production wastewater according to the present invention;

[0032] Figure 5 This is a schematic diagram of the transmission mechanism structure of a denitration catalyst production wastewater treatment system of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a pre-compression mechanism of a treatment system for denitration catalyst production wastewater according to the present invention;

[0034] Figure 7 It is a schematic diagram of the state when a compression frame in a pre-compression mechanism of a denitration catalyst production wastewater treatment system of the present invention is lowered to the lowest position;

[0035] Figure 8 This is a schematic structural diagram of a recompression device for a treatment system of denitration catalyst production wastewater according to the present invention;

[0036] Fig. 9This is a schematic diagram of the internal structure of a gear box of a treatment system for denitration catalyst production wastewater according to the present invention;

[0037] Fig.10 This is a schematic diagram of a compression frame and a screw structure of a treatment system for denitration catalyst production wastewater according to the present invention;

[0038] Fig.11 This is an enlarged schematic diagram of the structure of location A of a treatment system for denitration catalyst production wastewater according to the present invention;

[0039] Fig.12 This is a schematic diagram of the bottom plate structure of a system for treating denitration catalyst production wastewater according to the present invention.

[0040] In the figure: 1. sewage treatment tank; 2. biochemical treatment tank; 3. catalytic oxidation tank; 4. sedimentation tank; 5. sludge contact reactor; 6. sludge thickening tank; 7. filter press; 8. filtrate delivery pipe; 9. sludge delivery pipe; 10. pretreatment device; 11. pre-compression mechanism; 12. fixed block; 13. support limit rod; 14. bottom plate; 15. connection port; 16. discharge port; 17. bump; 18. compression frame; 19. accommodating chamber; 20. cam mechanism; 21. transmission shaft; 22. motor 1; 23. push rod; 24. top plate; 25. mud brick; 26. push mechanism; 27. screw; 28. spline shaft; 29. ​​lever; 30. variable pitch spiral groove; 31. matching tooth 2; 32. toggle slider; 33. matching tooth 1; 34. shell; 35 , fixed frame; 36, bracket one; 37, conveying port; 38, locking mechanism; 39, hinge seat two; 40, hinge seat one; 41, rocker arm; 42, slide slot; 43, baffle; 44, feed port; 45, cam; 46, transmission gear two; 47, transmission gear one; 48, re-compression device; 49, conveying mechanism; 50, bracket two; 51, conveyor belt; 52, power mechanism; 53, motor two; 54, gear box; 55, rack push rod; 56, compression block; 57, drive shaft; 58, driving gear; 59, half gear one; 60, driven shaft; 61, output shaft; 62, driven gear; 63, half gear two; 64, output gear one; 65, output gear two; 66, slide rod; 67, spring; 68, positioning block; 69, positioning slot. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-12, a treatment system for denitrification catalyst production wastewater, comprising a sewage treatment tank 1, a biochemical treatment tank 2, a catalytic oxidation tank 3, a sedimentation tank 4, a sludge contact reactor 5, a sludge concentration tank 6 and a filter press 7 connected in sequence, the filter press 7 is connected with a filtrate delivery pipe 8 for delivering filtrate to the sewage treatment tank 1, the sedimentation tank 4 is connected with a sludge delivery pipe 9 for delivering sludge to the sludge concentration tank 6, and the filter press 7 includes a pretreatment device 10. The microorganisms in the biochemical treatment tank 2 can convert ammonia nitrogen into nitrates through the nitrification-denitrification process, and then further reduce it to nitrogen gas, thereby effectively removing ammonia nitrogen in the wastewater. Secondly, the microorganisms in the biochemical treatment tank 2 can degrade organic pollutants in the wastewater and convert them into harmless substances, such as carbon dioxide and water. The treated sewage is then discharged into the catalytic oxidation tank 3, and the catalytic oxidation process can decompose the difficult-to-degrade organic matter in the wastewater and convert it into easily biodegradable substances. The sewage is then discharged into the sedimentation tank 4 to precipitate the solid particles therein. After the precipitation is completed, the supernatant is discharged into the sludge contact reactor 5, and the unsettled sludge is granulated to further purify the sewage. Then, the sludge in the sedimentation tank 4 and the sludge contact reactor 5 is transferred to the sludge thickening tank 6. Finally, the sludge in the sludge thickening tank 6 is discharged into the filter press device 7 to be processed into mud bricks 25. In the process of the filter press device 7 compressing the sludge into mud bricks 25, the filtrate generated is discharged back into the sewage treatment tank 1 through the filtrate delivery pipe 8.

[0043] The pretreatment device 10 includes a pre-compression mechanism 11 and a pushing mechanism 26. The pre-compression mechanism 11 is mainly responsible for the initial compression of the sludge, compressing the sludge from a loose state into a relatively compact mud brick 25. The pushing mechanism 26 pushes the compressed mud brick 25 out of the pretreatment device 10, so that the mud brick 25 enters the re-compression device 48.

[0044] The pre-compression mechanism 11 also includes a fixed block 12, a support and limit rod 13 and a bottom plate 14. The bottom plate 14 serves as the basic support structure of the pre-compression mechanism 11. The support and limit rod 13 is not only used to support the fixed block 12 above it, but also allows the compression frame 18 to slide up and down thereon and limits its sliding direction. A connecting port 15 is provided on the top of the fixed block 12, and the connecting port 15 is connected to a discharge port 16. The discharge port 16 is used to place sludge, and the connecting port 15 guides the sludge to fall into the accommodating chamber 19 of the compression frame 18. A protrusion 17 is provided at the bottom of the fixed block 12, and a compression frame 18 is slidably provided on the support and limit rod 13, and the compression frame 18 is provided with an accommodating chamber 19, and the accommodating chamber 19 is used to receive the sludge that needs to be compressed. The sludge flows through the discharge port 16 through the connecting port 15 and enters the accommodating chamber 19. A cam mechanism 20 is also provided under the bottom plate 14. The cam mechanism 20 includes a transmission shaft 21 and a motor 22. The cam mechanism 20 drives the compression frame 18 to reciprocate between the fixed block 12 and the bottom plate 14. When the compression frame 18 moves toward the fixed block 12, the accommodating chamber 19 and the protrusion 17 squeeze each other so that the sludge is compressed into a mud brick 25.

[0045] The bottom plate 14 is also provided with a push rod 23 extending from the bottom of the compression frame 18 into the accommodating chamber 19, and a top plate 24 is provided on the top of the push rod 23. When the sludge is compressed, the compression frame 18 descends, and the top plate 24 on the push rod 23 pushes the mud brick 25 in the accommodating chamber 19 upward.

[0046] The pushing mechanism 26 includes a screw 27, a spline shaft 28 and a lever 29 arranged between the fixed block 12 and the bottom plate 14. The compression frame 18 is slidably connected with the screw 27 and the spline shaft 28. The screw 27 is provided with a variable pitch spiral groove 30 and a second matching tooth 31. The compression frame 18 is provided with a toggle slider 32 matched with the variable pitch spiral groove 30. When the compression frame 18 moves, the screw 27 is driven to rotate. The spline shaft 28 is provided with a matching tooth 1 33, and the matching tooth 2 31 and the matching tooth 1 33 are meshed with each other. The lever 29 is fixedly connected with the spline shaft 28, and the spline shaft 28 drives the lever 29 to rotate to push the compressed mud brick 25 out of the top of the compression frame 18. The screw 27 and the spline shaft 28 also play the same role as the support limit rod 13. Secondly, the screw 27 is provided with a variable pitch spiral groove 30 and a matching tooth 2 31. The variable pitch spiral groove 30 cooperates with the toggle slider 32. The spline shaft 28 is provided with a matching tooth 1 33 and a toggle rod 29. The matching tooth 2 31 and the matching tooth 1 33 are meshed with each other. When the sludge is compressed, the compression frame 18 descends, and the push rod 23 pushes the mud brick 25 located in the accommodating chamber 19 upward. The toggle slider 32 on the compression frame 18 drives the screw 27 to rotate clockwise, and the matching tooth 2 31 drives the matching tooth 1 33 to rotate counterclockwise. The toggle rod 29 facing outward rotates toward the inside of the compression frame 18 to push the ejected mud brick 25 forward into the re-compression device 48.

[0047] A housing 34 is provided on the outside of the pre-compression mechanism 11, and a fixing frame 35 is provided at the bottom of the bottom plate 14. The fixing frame 35 is fixedly provided on the housing 34, and the fixing frame 35 is used to fix the bottom plate 14 and maintain the stability of the bottom plate 14. A bracket 1 36 is also provided inside the housing 34, and the bracket 1 36 is located above the fixing block 12 and is fixedly connected to the fixing block 12. The bracket 1 36 is used to fix the fixing block 12. The housing 34 is also provided with a conveying port 37, and the conveying port 37 allows the mud bricks 25 pushed out by the shifting block to smoothly enter the conveying belt 51 of the re-compression device 48.

[0048] There are two sets of screw rods 27 and spline shafts 28, which are respectively located on both sides of the compression frame 18. The two sets of screw rods 27 and spline shafts 28 can not only provide uniform support for the compression frame 18. Secondly, the screw rods 27 and spline shafts 28 are arranged on both sides of the compression frame 18, and there are also two levers 29 arranged on the spline shafts 28, which can better push the ejected mud bricks 25 forward to the delivery port 37 uniformly.

[0049] The pretreatment device 10 further includes a locking mechanism 38, which includes an articulated seat 2 39, which is arranged on the side of the compression frame 18 close to the spline shaft 28. An articulated seat 1 40 is arranged on the side of the fixed block 12 close to the spline shaft 28, and one end of a swing rod 41 is hinged on the articulated seat 2 39, and a slide groove 42 is arranged in the middle of the swing rod 41. The articulated seat 1 40 is installed in the slide groove 42, and one end of a baffle 43 is also rotatably arranged in the slide groove 42. The baffle 43 is arranged on the connection port 15, and a feed port 44 is arranged on the baffle 43. When the compression frame 18 descends to the lowest point, the swing rod 41 swings inwards, pushing the baffle 43 inwards, so that the feed port 44 on the baffle 43 is connected to the connection port 15. Conversely, when the compression frame 18 rises to the highest point, the swing rod 41 swings outwards, pulling the baffle 43 outwards, so that the baffle 43 seals the connection port 15. Realize the actions of automatic feeding and stopping feeding.

[0050] The cam mechanism 20 includes a transmission shaft 21 and a motor 1 22. Cams 45 are arranged on both sides of the transmission shaft 21. The cams 45 contact the bottom of both sides of the compression frame 18. Both ends of the transmission shaft 21 are arranged on the housing 34. A transmission gear 2 46 is arranged on the transmission shaft 21. The motor 1 22 is fixedly mounted on the bottom of the base plate 14. A transmission gear 1 47 is arranged on the motor 1 22. The transmission gear 1 47 and the transmission gear 2 46 are meshed with each other. This is a prior art and will not be described in detail here.

[0051] The bottom of the fixed block 12 is provided with a protrusion 17, and the shape and size of the protrusion 17 are the same as the accommodating cavity 19 of the compression frame 18. When the compression frame 18 rises to the top, the protrusion 17 will be embedded in the accommodating cavity 19, compressing the sludge therein as tightly as possible, making the compressed mud brick 25 more solid and convenient for subsequent processing.

[0052] A re-compression device 48 is also provided outside the pre-treatment device 10. The re-compression device 48 further compresses the compressed mud bricks 25 to further reduce the moisture therein, making the mud bricks 25 more compact and more conducive to subsequent transportation or other treatments.

[0053] The re-compression device 48 includes a conveying mechanism 49, and the conveying mechanism 49 includes a bracket 2 50. A conveyor belt 51 is arranged on the upper part of the bracket 2 50. The bracket 2 50 is used to support the conveyor belt 51 and the motor 2 53. The conveyor belt 51 is used to receive the mud bricks 25 sent from the conveying port 37 and transport the compressed mud bricks 25. The conveyor belt 51 is close to the conveying port 37. When the compressed mud brick 25 is pushed toward the conveying port 37 by the lever 29, one side of the mud brick 25 first contacts the conveyor belt 51. At this time, the mud brick 25 is gradually brought out by the conveyor belt 51 and moves forward with the conveying.

[0054] A power mechanism 52 is also provided on the side of the bracket 50, and the power mechanism 52 includes a motor 53. The motor 53 is connected to a gear box 54, and the motor 53 provides power for the re-compression device 48. The components in the gear box 54 are driven to move. A rack push rod 55 is provided in the gear box 54, and the rack push rod 55 passes through the gear box 54. A compression block 56 is provided at the bottom of the rack push rod 55. The rack push rod 55 moves up and down under the drive of the gear box 54, driving the compression block 56 to move up and down, thereby realizing further compression and unloading of the mud bricks 25.

[0055] The gear box 54 includes a driving shaft 57, which is connected to the motor 2 53. The driving shaft 57 is provided with a driving gear 58 and a half gear 1 59. The gear box 54 also includes a driven shaft 60 and an output shaft 61. The two ends of the driven shaft 60 and the output shaft 61 are respectively connected to the housing of the gear box 54. The driven shaft 60 is provided with a driven gear 62 and a half gear 2 63. The driven gear 62 is meshed with the driving gear 58. The output shaft 61 is provided with an output gear 1 64 and an output gear 2 65. The output gear 1 64 is meshed with the half gear 1 59 and the half gear 2 63 respectively, and the output gear 2 65 is meshed with the rack push rod 55. When the half gear 1 59 is meshed with the output gear 1 64, the half gear 2 63 is not meshed with the output gear 1 64. At this time, the output gear 1 64 rotates counterclockwise, driving the output gear 2 65 to rotate counterclockwise, and finally the rack push rod 55 is lowered. On the contrary, when the half gear 2 63 is meshed with the output gear 1 64, the half gear 1 59 is not meshed with the output gear 1 64, and the output gear 1 64 rotates clockwise, driving the output gear 2 65 to rotate clockwise, and finally raising the rack push rod 55. The rise and fall of the rack push rod 55 drives the rise and fall of the compression block 56 and the positioning block 68, thereby achieving further compression and unloading of the mud bricks 25.

[0056] A slide bar 66 is slidably provided on the compression block 56, a positioning block 68 is fixedly provided at the bottom of the slide bar 66, and a spring 67 is also provided on the slide bar 66, and the spring 67 is located between the compression block 56 and the positioning block 68. A positioning groove 69 is provided in the middle of the positioning block 68, and the size and shape of the positioning groove 69 are the same as those of the mud brick 25. During the downward pressing process of the compression block 56, after the mud brick 25 is limited by the positioning groove 69 in the middle of the positioning block 68, the positioning block 68 is pressed tightly on the conveyor belt 51, and the compression block 56 is compressed downward by the slide bar 66, and the mud brick 25 is further compressed. The spring 67 provides a reset force for the compression block 56. After the compression is completed, the compression block 56 is helped to return to the initial position to prepare for the next compression.

[0057] Working principle: First, the sewage is collected in the collection tank, and then the sewage is discharged into the biochemical treatment tank 2. The microorganisms in the biochemical treatment tank 2 can convert ammonia nitrogen into nitrates through the nitrification-denitrification process, and then further reduce it to nitrogen gas, thereby effectively removing ammonia nitrogen in the wastewater. Secondly, the microorganisms in the biochemical treatment tank 2 can degrade organic pollutants in the wastewater and convert them into harmless substances, such as carbon dioxide and water. The treated sewage is then discharged into the catalytic oxidation tank 3. The catalytic oxidation process can decompose the difficult-to-degrade organic matter in the wastewater and convert it into easily biodegradable substances. The sewage is then discharged into the sedimentation tank 4 to precipitate the solid particles therein. After the precipitation is completed, the supernatant therein is discharged into the sludge contact reactor 5, and the unsettled sludge therein is granulated to further purify the sewage. The sludge in the sedimentation tank 4 and the sludge contact reactor 5 is then transferred to the sludge thickening tank 6. Finally, the sludge in the sludge thickening tank 6 is discharged into the filter press 7 to process the sludge into mud bricks 25.

[0058] First, put the sludge into the pre-compression mechanism 11 from the discharge port 16, and the sludge falls into the accommodating chamber 19 of the compression frame 18 along the pipe connection port 15. In the process of the sludge falling into the accommodating chamber 19, the cam 45 rotates to drive the compression frame 18 to move upward. In the process of the compression frame 18 moving upward, the accommodating chamber 19 is gradually filled with sludge, and the compression frame 18 drives the screw 27 to rotate counterclockwise, so that the spline shaft 28 rotates clockwise, and further rotates the lever 29 from the inside to the outside to prevent the lever 29 from interfering with the pressing between the compression frame 18 and the fixed block 12. When the compression frame 18 rises to the top, the hinge seat 2 39 and the hinge seat 1 40 make the swing rod 41 swing outward, pull the baffle 43 outward, so that the connection port 15 is blocked by the baffle 43, and the sludge in the discharge port 16 no longer falls. When the compression frame 18 rises to the top, the protrusion 17 at the bottom of the fixed block 12 is pressed into the accommodating chamber 19, and the sludge therein is compressed into mud bricks 25. After the compression is completed, under the action of the cam 45, the compression frame 18 descends, and the top plate 24 on the push rod 23 pushes the compressed mud bricks 25 upward from the bottom of the accommodating chamber 19, and in the process of the compression frame 18 descending, the compression frame 18 drives the screw rod 27 to rotate clockwise, so that the spline shaft 28 rotates counterclockwise, and further causes the lever 29 to rotate from outside to inside, and pushes the pushed mud bricks 25 forward, so that the mud bricks 25 slide into the conveying port 37, and then the mud bricks 25 enter the re-compression device 48. In the process of the compression frame 18 descending, the hinge seat 2 39 and the hinge seat 1 40 drive the swing rod 41 to swing inward, so that the feed port 44 and the connecting port 15 are connected again, and the sludge continues to fall into the accommodating chamber 19. The cycle is repeated.

[0059] When the mud brick 25 enters the conveyor belt 51 of the re-compression device 48 from the conveying port 37, the conveyor belt 51 transports the mud brick 25 to the bottom of the positioning block 68. The motor 2 53 drives the drive shaft 57 to rotate clockwise, and the half gear 1 59 on the drive shaft 57 rotates clockwise. The driving gear 58 on the drive shaft 57 drives the driven gear 62 to rotate counterclockwise, thereby driving the half gear 2 63 to rotate counterclockwise. Since the output gear 1 64 is installed between the half gear 1 59 and the half gear 2 63. When the half gear 1 59 is meshed with the output gear 1 64, the half gear 2 63 is not meshed with the output gear 1 64. At this time, the output gear 1 64 rotates counterclockwise, driving the output gear 2 65 to rotate counterclockwise, and finally the rack push rod 55 is lowered. On the contrary, when the half gear 2 63 is meshed with the output gear 1 64, the half gear 1 59 is not meshed with the output gear 1 64, and the output gear 1 64 rotates clockwise, driving the output gear 2 65 to rotate clockwise, and finally raising the rack push rod 55. The rise and fall of the rack push rod 55 drives the rise and fall of the compression block 56 and the positioning block 68, thereby achieving further compression and unloading of the mud bricks 25.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for treating wastewater from the production of denitrification catalysts, characterized in that: The invention comprises a sewage treatment tank (1), a biochemical treatment tank (2), a catalytic oxidation tank (3), a sedimentation tank (4), a sludge contact reactor (5), a sludge concentration tank (6) and a filter press device (7) which are connected in sequence, wherein the filter press device (7) is connected to a filtrate delivery pipe (8) for delivering filtrate to the sewage treatment tank (1), the sedimentation tank (4) is connected to a sludge delivery pipe (9) for delivering sludge to the sludge concentration tank (6), and the filter press device (7) comprises a pretreatment device (10); The pretreatment device (10) comprises a pre-compression mechanism (11) and a material pushing mechanism (26); The pre-compression mechanism (11) further comprises a fixed block (12), a support and limit rod (13) and a bottom plate (14); a connection port (15) is provided on the top of the fixed block (12); the connection port (15) is connected to a discharge port (16); a protrusion (17) is provided on the bottom of the fixed block (12); a compression frame (18) is slidably provided on the support and limit rod (13); the compression frame (18) is provided with a receiving cavity (19); sludge flows through the discharge port (16) and passes through the connection port (15) entering the accommodating chamber (19), a cam mechanism (20) is further provided below the bottom plate (14), the cam mechanism (20) comprising a transmission shaft (21) and a motor (22), the cam mechanism (20) driving the compression frame (18) to perform reciprocating motion between the fixed block (12) and the bottom plate (14), when the compression frame (18) moves toward the fixed block (12), the accommodating chamber (19) and the protrusion (17) are mutually squeezed so that the sludge is compressed into a mud brick (25); The bottom plate (14) is also provided with a push rod (23) extending from the bottom of the compression frame (18) into the accommodating chamber (19), and a top plate (24) is provided on the top of the push rod (23). When the sludge is compressed, the compression frame (18) descends, and the top plate (24) on the push rod (23) pushes the mud brick (25) in the accommodating chamber (19) upwards; The pushing mechanism (26) comprises a screw rod (27), a spline shaft (28) and a lever (29) arranged between the fixed block (12) and the bottom plate (14); the compression frame (18) is slidably connected to the screw rod (27) and the spline shaft (28); the screw rod (27) is provided with a variable pitch spiral groove (30) and a second matching tooth (31); the compression frame (18) is provided with a lever sliding block (32) matching with the variable pitch spiral groove (30); when the compression frame (18) moves, the screw rod (27) is driven to rotate; the spline shaft (28) is provided with a first matching tooth (33); the second matching tooth (31) and the first matching tooth (33) are meshed with each other; the lever (29) is fixedly connected to the spline shaft (28); the spline shaft (28) drives the lever (29) to rotate to push the compressed mud brick (25) out of the top of the compression frame (18); The pretreatment device (10) further comprises a locking mechanism (38), wherein the locking mechanism (38) comprises a second hinge seat (39), wherein the second hinge seat (39) is arranged on a side of the compression frame (18) close to the spline shaft (28), and a first hinge seat (40) is arranged on a side of the fixed block (12) close to the spline shaft (28), wherein one end of a swing rod (41) is hingedly connected to the second hinge seat (39), and a slide groove (42) is arranged in the middle of the swing rod (41). ), the hinge seat (40) is installed in the slide groove (42), one end of a baffle (43) is rotatably arranged in the slide groove (42), the baffle (43) is inserted into the connecting port (15), and a feed port (44) is arranged on the baffle (43). When the compression frame (18) drops to the lowest point, the swing rod (41) swings inwards to push the baffle (43) inwards, so that the feed port (44) on the baffle (43) is connected to the connecting port (15).

2. A system for treating denitration catalyst production wastewater according to claim 1, characterized in that: A shell (34) is arranged on the outside of the pre-compression mechanism (11), a fixing frame (35) is arranged at the bottom of the base plate (14), the fixing frame (35) is fixedly arranged on the shell (34), a bracket 1 (36) is also arranged inside the shell (34), the bracket 1 (36) is located above the fixing block (12) and is fixedly connected to the fixing block (12), and the shell (34) is also provided with a delivery port (37).

3. A treatment system for denitration catalyst production wastewater according to claim 1, characterized in that: The screw rod (27) and the spline shaft (28) are provided in two groups, and are respectively located on two sides of the compression frame (18).

4. A system for treating denitration catalyst production wastewater according to claim 1, characterized in that: Cams (45) are provided on both sides of the transmission shaft (21), and the cams (45) are in contact with the bottoms of both sides of the compression frame (18). Both ends of the transmission shaft (21) are provided on the housing (34), and a transmission gear 2 (46) is provided on the transmission shaft (21). The motor 1 (22) is fixedly mounted on the bottom of the base plate (14), and a transmission gear 1 (47) is provided on the motor 1 (22), and the transmission gear 1 (47) and the transmission gear 2 (46) are meshed with each other.

5. The system for treating denitration catalyst production wastewater according to claim 1, characterized in that: The shape and size of the protrusion (17) are the same as those of the accommodating cavity (19) of the compression frame (18).

6. The system for treating denitration catalyst production wastewater according to claim 1, characterized in that: A recompression device (48) is further provided outside the pretreatment device (10), the recompression device (48) includes a conveying mechanism (49), the conveying mechanism (49) includes a second bracket (50), a conveying belt (51) is provided on the upper part of the second bracket (50), the conveying belt (51) is closely attached to the conveying port (37), and the conveying belt (51) is used to receive the mud bricks (25) delivered from the conveying port (37); A power mechanism (52) is also provided on the side of the second bracket (50), and the power mechanism (52) includes a second motor (53). The second motor (53) is connected to a gear box (54), and a rack push rod (55) is provided in the gear box (54). The rack push rod (55) passes through the gear box (54), and a compression block (56) is provided at the bottom of the rack push rod (55).

7. A system for treating denitration catalyst production wastewater according to claim 6, characterized in that: The gear box (54) comprises a driving shaft (57), the driving shaft (57) being connected to the second motor (53), the driving shaft (57) being provided with a driving gear (58) and a half gear one (59), the gear box (54) also comprising a driven shaft (60) and an output shaft (61), the two ends of the driven shaft (60) and the output shaft (61) being respectively connected to the housing of the gear box (54), the driven shaft (60) being provided with a driven gear (62) and a half gear two (63), the driven gear (62) being meshed with the driving gear (58), the output shaft (61) being provided with an output gear one (64) and an output gear two (65), the output gear one (64) being respectively meshed with the half gear one (59) and the half gear two (63) in an alternating manner, and the output gear two (65) being meshed with the rack push rod (55).

8. A system for treating denitration catalyst production wastewater according to claim 6, characterized in that: A slide rod (66) is slidably disposed on the compression block (56), a positioning block (68) is fixedly disposed at the bottom of the slide rod (66), and a spring (67) is also disposed on the slide rod (66), and the spring (67) is located between the compression block (56) and the positioning block (68).

9. A system for treating denitration catalyst production wastewater according to claim 8, characterized in that: A positioning groove (69) is provided in the middle of the positioning block (68), and the size and shape of the positioning groove (69) are the same as those of the mud brick (25).

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