Ammonia nitrogen flocculant preparation and treatment device for sewage treatment

Abstract

This invention relates to the field of flocculant preparation technology and provides a device for preparing ammonia nitrogen flocculants for wastewater treatment, including a base and a preparation tank fixed on top of the base to provide space for ammonia nitrogen flocculant preparation. The preparation tank is divided into a premixing tank, a maturation tank, and a storage tank by baffles. The wastewater treatment ammonia nitrogen flocculant preparation device provided by this solution achieves stable delivery and independent purification of the flocculant solution by setting up a multi-compartment overflow connection with an anti-backflow structure, combined with air pressure balance and anti-splash structures, thus improving the quality of flocculant preparation. It utilizes a single power source to construct a multi-stage differentiated speed stirring and bottom scraping linkage system, and adopts a purely mechanical quantitative feeding and stirring linkage feeding mechanism, eliminating the problems of feeding blockage and agglomeration due to lack of stirring, and ensuring the accuracy of dosing.

Description

Technical Field

[0001] This invention belongs to the field of flocculant preparation technology, and particularly relates to a device for preparing and treating ammonia nitrogen flocculants for wastewater treatment. Background Technology

[0002] The wastewater treatment ammonia nitrogen flocculant preparation and treatment device is not a single agent manufacturing equipment, but a modern automated dosing system that integrates powder conveying, liquid dissolution, polymer maturation, precise metering, and PLC intelligent control. It is mainly used to efficiently dissolve and mature ammonia nitrogen removal agents (such as oxidants or precipitants) and flocculants (such as PAC and PAM) and precisely add them to wastewater. The device is mainly composed of core components such as a dissolving tank, maturation tank, storage tank, metering pump, and automatic control cabinet. During operation, the device automatically feeds and prepares a mother liquor of a fixed concentration through influent. After thorough stirring and settling maturation, the metering pump adjusts the dosage in a closed loop according to the influent flow rate or online water quality monitoring data.

[0003] When ammonia nitrogen flocculant preparation and treatment equipment is used for continuous processing, pump-type equipment is prone to shearing the raw materials, which affects the quality. Moreover, it requires a large investment and is not suitable for small-scale treatment scenarios. On the other hand, overflow-type preparation and treatment equipment uses water level monitoring and overflow to allow the raw materials to enter the next stage. When the overflow stops, the pressure difference between the compartments can easily cause liquid backflow, which can easily lead to cross-contamination between the compartments. At the same time, the curing path length is only within the inner diameter of the curing cylinder, which can easily lead to uneven curing. Summary of the Invention

[0004] This invention provides a wastewater treatment ammonia nitrogen flocculant preparation and treatment device, which aims to solve the problem that when the ammonia nitrogen flocculant preparation and treatment device mentioned in the background art stops overflowing, the liquid in each compartment is prone to backflow due to pressure difference, which in turn easily leads to cross-contamination between compartments.

[0005] To solve the above problems, the present invention is implemented as follows: a wastewater treatment ammonia nitrogen flocculant preparation and treatment device, comprising: a base; a preparation box fixed on the top of the base for providing space for ammonia nitrogen flocculant preparation, the preparation box being divided into a premixing chamber, a maturation chamber, and a storage chamber by baffles, the two baffles being located between the premixing chamber and the maturation chamber, and between the maturation chamber and the storage chamber, respectively; overflow connectors fixed on the two baffles for providing overflow channels; anti-backflow structures detachably installed on the two baffles for preventing liquid backflow; and a storage structure disposed on the top of the preparation box for storing solid raw materials.

[0006] Preferably, the overflow connector includes a T-shaped pipe fixed to the baffle plate, an exhaust port located outside the preparation box for balancing the internal air pressure of the pipe, a movable ball placed inside the T-shaped pipe for sealing the exhaust port when the pipe is impacted by a large flow rate to prevent a large amount of raw material liquid from spraying out, multiple protrusions installed inside the T-shaped pipe for reducing the contact area between the movable ball and the inner wall of the T-shaped pipe, and a limiting rod inside the T-shaped pipe for supporting the movable ball.

[0007] Preferably, a support cylinder is fixed to the top of the preparation box, a support rod is threaded on the internal thread of the support cylinder, a protective cap is rotatably installed on the top of the support rod, the protective caps are arranged in groups and are respectively located directly above the two exhaust ports, and a collection cylinder for collecting overflow liquid is fixed to the top of the preparation box and sleeved outside the three-way pipe.

[0008] Preferably, the anti-backflow structure includes a mounting bracket detachably mounted on the baffle, a plug plate hinged to the mounting bracket via a soft connecting piece, the plug plate being in contact with the drain end of the tee pipe to prevent liquid backflow, and a spring plate detachably mounted between the plug plate and the mounting bracket.

[0009] Preferably, a first stirring rod, a second stirring rod, and a third stirring rod are rotatably installed in the premixing chamber, the maturation chamber, and the storage chamber, respectively. The second stirring rods are arranged in groups. The first, second, and third stirring rods all extend outside the preparation box. A first transmission belt group for transmission is provided between two second stirring rods. A second transmission belt group is provided between the first stirring rod and any one of the second stirring rods. The preparation box is provided with a ratchet drive shaft connected to the third stirring rod. A third transmission belt group is provided between the ratchet drive shaft and another second stirring rod. A motor is fixed on the base. The output shaft of the motor is connected to the first stirring rod through a coupling. The transmission ratio between the first stirring rod and the second stirring rod is not less than 10:1, and the transmission ratio between the two second stirring rods and the third stirring rod is 1:1.

[0010] Preferably, the ratchet drive shaft includes a fixed frame fixed on the preparation box, a support shaft frame rotatably mounted on the fixed frame, a third drive belt assembly mounted on the support shaft frame, a spring sleeve fixed on the support shaft frame, a ratchet disc mounted on the spring sleeve, and a ratchet seat fixed on the third stirring rod and meshing with the ratchet disc. The ratchet disc, spring sleeve, and ratchet seat cooperate to drive when the output shaft of the motor rotates forward and disconnect the drive when it rotates in reverse, so as to meet the storage requirements where stirring is not required.

[0011] Preferably, a scraper plate is rotatably installed in the premixing chamber, maturation chamber, and storage chamber via a rotating shaft. Multiple rotating shafts extend outside the preparation box, and a fourth transmission belt assembly for transmission is provided between the multiple rotating shafts. A first transmission shaft and a second transmission shaft are rotatably installed on the preparation box. A fifth transmission belt assembly is provided between any one of the rotating shafts and the first transmission shaft. A first bevel gear is fixed on both the first and second transmission shafts, and two first bevel gears mesh for transmission. A second bevel gear is fixed on both the second transmission shaft and the third stirring rod, and two second bevel gears mesh for transmission.

[0012] Preferably, the storage structure includes a storage cylinder fixed to the top of the mixing tank, a discharge cylinder extending into the premixing chamber installed at the bottom of the storage cylinder, a crankshaft rotatably installed inside the storage cylinder, a connecting rod rotatably sleeved on the crankshaft, a metering cylinder hinged to the connecting rod, the metering cylinder slidingly contacting the interior of the discharge cylinder, the metering cylinder having a metering notch, and an encoder installed on the storage cylinder and connected to the crankshaft.

[0013] Preferably, a support frame is fixed on the preparation box, and a limit block is rotatably mounted on the support frame via an mounting shaft. A sixth transmission belt assembly is provided between the mounting shaft and the crank shaft. A support plate is fixed on the first stirring rod, and a first electric telescopic rod is mounted on the support plate. A limit cylinder for transmission is fixed on the output rod of the first electric telescopic rod and sleeved outside the limit block.

[0014] Preferably, the storage tank is equipped with a level gauge for detecting the water level, the maturation tank is equipped with staggered partitions to ensure the maturation time of the raw materials, the storage tank is equipped with a guide plate to reduce the impact force of overflow liquid, and the premixing tank, storage tank and maturation tank are all equipped with drain pipes for discharging liquid. The drain pipe on the storage tank is connected to the inlet of an external metering pump, and the top of the premixing tank is equipped with an inlet connected to the drain of an external water pump.

[0015] Compared with related technologies, the wastewater treatment ammonia nitrogen flocculant preparation and treatment device provided by the present invention has the following beneficial effects: Compared with existing technologies, the ammonia nitrogen flocculant preparation and treatment device for wastewater treatment provided in this solution achieves stable delivery and independent cleaning of the flocculant solution by setting up a multi-compartment overflow connection with an anti-backflow structure, combined with air pressure balance and anti-splash structure, thus improving the quality of flocculant preparation. It utilizes a single power source to build a multi-stage differentiated speed stirring and bottom scraping linkage system, and with the help of a ratchet clutch mechanism, it meets the different process requirements of premixing, maturation and storage, effectively preventing floc destruction and raw material deposition. It adopts a purely mechanical quantitative feeding and stirring linkage feeding mechanism to eliminate feeding blockage and agglomeration problems caused by air dosing without stirring, ensuring the accuracy of dosing. At the same time, it integrates multi-point high-pressure flushing and pneumatic automatic unblocking mechanism to improve the self-cleaning and anti-clogging capabilities of the equipment. Attached Figure Description

[0016] Figure 1 This is a front view three-dimensional structural schematic diagram of an ammonia nitrogen flocculant preparation and treatment device for wastewater treatment provided by the present invention; Figure 2 This is a front view three-dimensional cross-sectional structural schematic diagram of an ammonia nitrogen flocculant preparation and treatment device for wastewater treatment provided by the present invention; Figure 3 This is a top-view three-dimensional structural diagram of the present invention; Figure 4 This is a schematic diagram of the main structure of the present invention; Figure 5 This is a schematic diagram of the front sectional view of the preparation box in this invention; Figure 6 This is a top view of the preparation box in this invention. Figure 7 This is a schematic diagram of the assembly structure of the preparation box and the protective door in this invention; Figure 8 This is a three-dimensional structural diagram of the anti-backflow structure in this invention; Figure 9 This is a cross-sectional view of the tee pipe in this invention; Figure 10 for Figure 3 An enlarged structural diagram of part A shown in the figure; Figure 11 for Figure 6 An enlarged structural diagram of part B shown in the figure; Figure 12 This is a top view schematic diagram of the anti-blocking structure in this invention.

[0017] Reference numerals: 1. Base; 2. Mixing box; 3. Baffle; 4. Premixing chamber; 5. Maturation chamber; 6. Storage chamber; 7. Overflow connector; 8. T-connector; 9. Movable ball; 10. Protruding strip; 11. Limiting rod; 12. Support cylinder; 13. Support rod; 14. Protective cap; 15. Collector cylinder; 16. Anti-backflow structure; 17. Mounting bracket; 18. Flexible connecting piece; 19. Blocking plate; 20. Elastic plate; 21. First stirring rod; 22. Second stirring rod; 23. Third stirring rod; 24. Motor; 25. First transmission belt assembly; 26. Second transmission belt assembly; 27. Ratchet drive shaft; 28. Third transmission belt assembly; 29. ​​Fixing bracket; 30. Support shaft bracket 31. Spring cylinder; 32. Ratchet disc; 33. Ratchet seat; 34. Scraper plate; 35. First drive shaft; 36. Fourth drive belt assembly; 37. Fifth drive belt assembly; 38. Second drive shaft; 39. First bevel gear; 40. Second bevel gear; 41. Storage cylinder; 42. Crankshaft; 43. Connecting rod; 44. Metering cylinder; 45. Encoder; 46. Drain pipe; 47. Partition plate; 48. Level gauge; 49. Support frame; 50. Limiting block; 51. Sixth drive belt assembly; 52. Support disc; 53. First electric telescopic rod; 54. Limiting cylinder; 55. Protective door; 56. Exhaust pipe; 57. Connecting cylinder; 58. Telescopic rod cylinder; 59. Flushing pipe. Detailed Implementation

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This invention provides a device for preparing and treating ammonia nitrogen flocculants for wastewater treatment, such as... Figure 1-12 As shown, the wastewater treatment ammonia nitrogen flocculant preparation and treatment device includes: a base 1; a preparation tank 2 fixed on the top of the base 1 for providing space for ammonia nitrogen flocculant preparation, the preparation tank 2 being divided into a premixing chamber 4, a maturation chamber 5, and a storage chamber 6 by baffles 3, the two baffles 3 being located between the premixing chamber 4 and the maturation chamber 5, and between the maturation chamber 5 and the storage chamber 6 respectively; overflow connectors 7 fixed on the two baffles 3 for providing overflow channels; anti-backflow structures 16 detachably installed on the two baffles 3 for preventing liquid backflow; and a storage structure set on the top of the preparation tank 2 for storing solid raw materials.

[0020] In this embodiment, during use, the operator adds solid raw materials into the mixing tank 2 through the storage structure. The solid raw materials fall into the premixing chamber 4. A certain amount of clean water is injected into the premixing chamber 4 to stir the solid-liquid mixture, so that the solid raw materials are fully dissolved. When the liquid level in the premixing chamber 4 rises to the overflow port height of the overflow connector 7, the liquid automatically flows into the maturation chamber 5 through the overflow connector 7. After the liquid is drained, the anti-backflow structure 16 is closed to prevent the liquid from flowing back from the maturation chamber 5 to the premixing chamber 4. When the liquid level in the maturation chamber 5 continues to rise to the overflow port height of the second overflow connector 7, the maturation liquid flows into the storage chamber 6 through the overflow connector 7. Similarly, the corresponding anti-backflow structure 16 prevents the liquid in the storage chamber 6 from flowing back into the maturation chamber 5. By setting overflow connectors 7 and detachable anti-backflow structures 16 on the two baffles 3 respectively, the premixing chamber 4, maturation chamber 5 and storage chamber 6 are connected sequentially by overflow. At the same time, when feeding stops or the system is shut down, the backflow of liquid between the chambers can be effectively blocked. This completely solves the problem of mutual contamination between chambers caused by pressure difference in the prior art, ensures the independent cleanliness of the premixed liquid, maturation liquid and storage liquid in their respective chambers, and improves the preparation quality of ammonia nitrogen flocculant mother liquor. The anti-backflow structure 16 adopts a detachable installation method, which is convenient for daily cleaning, maintenance and replacement, and reduces the use and maintenance costs.

[0021] In a further preferred embodiment of the present invention, the overflow connector 7 includes a three-way pipe 8 fixed on the baffle 3, the three-way pipe 8 having an exhaust port located outside the preparation box 2 for balancing the internal air pressure of the pipe, a movable ball 9 movably placed inside the three-way pipe 8 for sealing the exhaust port when the pipe is impacted by a large flow rate to prevent a large amount of raw material liquid from spraying out, a plurality of protrusions 10 installed inside the three-way pipe 8 for reducing the contact area between the movable ball 9 and the inner wall of the three-way pipe 8, and a limiting rod 11 for supporting the movable ball 9 inside the three-way pipe 8.

[0022] In this embodiment, when the premixing chamber 4 inside the preparation tank 2 overflows and delivers mother liquor to the maturation chamber 5 or the maturation chamber 5 overflows and delivers mother liquor to the storage chamber 6, the chambers are connected by the three-way pipe 8 on the baffle 3. The exhaust port of the three-way pipe 8 is located outside the preparation tank 2. Under normal overflow conditions, the movable ball 9 sinks down to the top of the limiting rod 11 of the three-way pipe 8, and the exhaust port is in a fully open state. The chambers inside the tank are connected to the outside atmosphere through the exhaust port, so that the air pressure inside each chamber is always balanced with the outside. The mother liquor can flow steadily and continuously from the upper chamber to the lower chamber by relying on its own gravity difference. When the system suddenly increases the feeding speed or the stirring mechanism starts and stops, causing a sudden large flow of impact on the three-way pipe 8, the high-speed flowing mother liquor carries the movable ball 9 upward along the inner wall of the three-way pipe 8. Under the action of the liquid flow impact force, the movable ball 9 quickly floats up and sticks to the exhaust port end of the three-way pipe 8, completely blocking the exhaust port and preventing a large amount of mother liquor from spraying out of the exhaust port. By setting a three-way pipe 8 in the overflow connector 7 in conjunction with a movable ball 9, the movable ball 9 settles and makes way under normal overflow conditions, allowing the vent to be unobstructed. Each compartment is connected to the outside atmosphere through the vent, effectively balancing the pressure difference caused by liquid level changes. This ensures that the mother liquor overflows smoothly by gravity between the premixing compartment 4, the maturation compartment 5, and the storage compartment 6, avoiding overflow interruption or flow fluctuation caused by pressure imbalance. When a large flow impact occurs, the movable ball 9 automatically floats up and seals the vent, preventing the mother liquor from spraying out in large quantities from the vent, which would cause waste of medicine and on-site pollution. The setting of the protrusion 10 greatly reduces the contact area between the movable ball 9 and the inner wall of the three-way pipe 8, making the movable ball 9 move more flexibly and quickly during the sealing and resetting process, with a shorter response time. At the same time, it reduces the risk of the movable ball 9 getting stuck due to large-area adhesion.

[0023] In a further preferred embodiment of the present invention, a support cylinder 12 is fixed to the top of the preparation box 2, a support rod 13 is threadedly installed on the support cylinder 12, a protective cap 14 is rotatably installed on the top of the support rod 13, the protective caps 14 are arranged in groups and are respectively located directly above the two exhaust ports, and a collection cylinder 15 for collecting overflow liquid is fixed to the top of the preparation box 2 and sleeved on the outside of the three-way pipe 8.

[0024] In this embodiment, when the ammonia nitrogen flocculant is prepared in the preparation tank 2, the premixing tank 4 and the maturation tank 5, and the maturation tank 5 and the storage tank 6 are connected to the outside through the exhaust port on the three-way pipe 8. At this time, the exhaust port is in an open state. When the three-way pipe 8 is splashed due to fluctuations in the liquid flow or the operation of the stirring mechanism, a small amount of mother liquor or liquid droplets may be sprayed upward along the exhaust port. The sprayed liquid is first intercepted and collected by the protective cap 14. The liquid droplets slide down along the inner wall of the protective cap 14 and converge to the bottom of the collection cylinder 15. The operator can remove the protective cap 14 by rotating the support rod 13, which makes it convenient to clean or replace the protective cap 14. By setting a manifold 15 outside the three-way pipe 8 and setting a protective structure consisting of a support cylinder 12, a support rod 13 and a protective cap 14 directly above the exhaust port, liquid droplets are prevented from spraying out and contaminating the processing environment.

[0025] In a further preferred embodiment of the present invention, the anti-backflow structure 16 includes a mounting bracket 17 detachably mounted on the baffle 3, a blocking plate 19 hinged to the mounting bracket 17 via a soft connecting piece 18, the blocking plate 19 being in contact with the drain end of the three-way pipe 8 to prevent liquid backflow, and an elastic plate 20 detachably mounted between the blocking plate 19 and the mounting bracket 17.

[0026] In this embodiment, when the premixing chamber 4 in the preparation tank 2 overflows into the maturation chamber 5 or the maturation chamber 5 overflows into the storage chamber 6, the mother liquor flows from the upper chamber into the lower chamber through the three-way pipe 8. The impact force of the liquid flow acts on the plug plate 19, overcoming the elastic resistance of the elastic plate 20 and pushing the plug plate 19 open. The plug plate 19 rotates relative to the mounting frame 17 through the soft connecting piece 18. The plug plate 19 disengages from the drain end of the three-way pipe 8, and the mother liquor smoothly overflows through the drain end. When the system stops feeding or when there is a backflow tendency between the chambers due to the pressure difference, the impact force of the liquid flow disappears, the elastic plate 20 releases its stored energy and generates elastic restoring force, pushing the plug plate 19 back to its initial position. The end face of the plug plate 19 tightly fits the drain end of the three-way pipe 8 to form a seal and block the liquid from flowing back from the downstream chamber to the upstream chamber. By setting an anti-backflow structure 16 on the baffle 3, which is composed of a mounting bracket 17, a soft connecting piece 18, a blocking plate 19 and an elastic plate 20, the overflow channel is automatically opened when there is liquid flow and automatically sealed when there is no liquid flow, thus solving the problem of liquid backflow and cross-contamination between compartments caused by pressure difference. The soft material itself has good corrosion resistance and is not easy to age or break after long-term contact with liquid. Compared with the shaft hinge structure, it can effectively prevent jamming.

[0027] In a further preferred embodiment of the present invention, a first stirring rod 21, a second stirring rod 22, and a third stirring rod 23 are rotatably installed in the premixing chamber 4, the maturation chamber 5, and the storage chamber 6, respectively. The second stirring rods 22 are arranged in groups. The first stirring rod 21, the second stirring rod 22, and the third stirring rod 23 all extend outside the preparation box 2. A first transmission belt group 25 for transmission is provided between two second stirring rods 22. A second transmission belt group 26 is provided between the first stirring rod 21 and any one of the second stirring rods 22. A ratchet drive shaft 27 connected to the third stirring rod 23 is provided on the preparation box 2. A third transmission belt group 28 is provided between the ratchet drive shaft 27 and the other second stirring rod 22. A motor 24 is fixed on the base 1. The output shaft of the motor 24 is connected to the first stirring rod 21 through a coupling. The transmission ratio between the first stirring rod 21 and the second stirring rod 22 is not less than 10:1, and the transmission ratio between the two second stirring rods 22 and the third stirring rod 23 is 1:1.

[0028] In this embodiment, when the device is started, the motor 24 drives the first stirring rod 21 to rotate at high speed in the premixing chamber 4 through the coupling. During the rotation, the first stirring rod 21 transmits power to the second stirring rod 22 through the second transmission belt group 26. Since the transmission ratio between the first stirring rod 21 and the second stirring rod 22 is set to be relatively high, the high speed of the first stirring rod 21 is reduced by the belt group and then transmitted to the second stirring rod 22, so that the second stirring rod 22 rotates at a low speed and smoothly in the maturation chamber 5, so that the mother liquor is fully matured. At the same time, the ratchet drive shaft 27 is connected to the third stirring rod 23 and drives the third stirring rod 23 to rotate in the storage chamber 6 at the same speed, ensuring that the third stirring rod 23 and the second stirring rod 22 maintain synchronous speed. The matured liquid is slowly and uniformly stirred in the storage chamber 6 to maintain a uniform and stable concentration of the medicine. By setting motor 24 as a single power source and utilizing the second transmission belt group 26, the first transmission belt group 25, the third transmission belt group 28, and the ratchet drive shaft 27 in coordination, a multi-stage mechanical transmission stirring system is constructed. This system achieves synchronous driving of the stirring rods at different speeds in the three chambers: premixing chamber 4, maturation chamber 5, and storage chamber 6. In premixing chamber 4, the first stirring rod 21 rotates at high speed to ensure rapid dissolution and thorough premixing of solid raw materials. In maturation chamber 5, multiple sets of second stirring rods 22 rotate at low speed after being reduced by a large transmission ratio, avoiding damage to the already formed floc structure caused by high-speed stirring and ensuring the full expansion and maturation effect of flocculant molecules. In storage chamber 6, the third stirring rod 23 rotates synchronously at the same speed as the second stirring rods 22, gently and uniformly stirring the stored mother liquor to prevent sedimentation and stratification. This eliminates the need to configure independent motors 24 in each chamber, reducing equipment manufacturing costs and electrical failure rates.

[0029] In a further preferred embodiment of the present invention, the ratchet drive shaft 27 includes a fixed frame 29 fixed on the preparation box 2, a support shaft frame 30 rotatably mounted on the fixed frame 29, a third drive belt assembly 28 mounted on the support shaft frame 30, a spring cylinder 31 fixed on the support shaft frame 30, a ratchet disc 32 mounted on the spring cylinder 31, and a ratchet seat 33 fixed on the third stirring rod 23 and meshing with the ratchet disc 32. The ratchet disc 32, the spring cylinder 31, and the ratchet seat 33 cooperate to drive the motor 24 when the output shaft rotates forward and disconnect the drive when it rotates backward, so as to meet the storage requirements where stirring is not required.

[0030] In this embodiment, when the ammonia nitrogen flocculant is prepared in the preparation tank 2, the motor 24 drives the first stirring rod 21 to rotate in the forward direction. The power is transmitted to the second stirring rod 22 through the second transmission belt group 26. The second stirring rod 22, which rotates in the forward direction, drives the support shaft frame 30 to rotate on the fixed frame 29 through the third transmission belt group 28. The support shaft frame 30 drives the spring cylinder 31 and ratchet disk 32 fixed on it to rotate in the forward direction synchronously. The ratchet teeth on the ratchet disk 32 tightly mesh with the ratchet seat 33, and transmits the rotational power of the support shaft frame 30 to the third stirring rod 23 through the ratchet seat 33. When the motor 24 reverses, the ratchet teeth on the ratchet disk 32 slide across the ratchet tooth surface of the ratchet seat 33, the spring cylinder 31 is compressed, and the meshing transmission between the ratchet disk 32 and the ratchet seat 33 is automatically disconnected. When the prepared liquid needs to be stirred to prevent sedimentation, the motor 24 rotates in the forward direction. When the prepared liquid needs to be left to stand to prevent rapid deactivation, the motor 24 reverses. By setting a ratchet clutch mechanism consisting of a fixed frame 29, a support shaft frame 30, a spring cylinder 31, a ratchet disc 32, and a ratchet seat 33 in the ratchet drive shaft 27, the third stirring rod 23 in the liquid storage tank 6 is automatically engaged when the motor 24 rotates forward and automatically disengaged when it rotates backward or stops. This enables the preparation tank 2 to flexibly switch between two working conditions: stirring preparation and static storage. There is no need to configure a separate start / stop motor 24 or control valve for the liquid storage tank 6, which simplifies the complexity of the electrical control system.

[0031] In a further preferred embodiment of the present invention, scraper plates 34 are rotatably mounted in the premixing chamber 4, maturation chamber 5 and storage chamber 6 via rotating shafts. Multiple rotating shafts extend outside the preparation box 2, and a fourth transmission belt group 36 for transmission is provided between the multiple rotating shafts. A first transmission shaft 35 and a second transmission shaft 38 are rotatably mounted on the preparation box 2. A fifth transmission belt group 37 is provided between any one of the rotating shafts and the first transmission shaft 35. A first bevel gear 39 is fixed on both the first transmission shaft 35 and the second transmission shaft 38, and the two first bevel gears 39 mesh for transmission. A second bevel gear 40 is fixed on both the second transmission shaft 38 and the third stirring rod 23, and the two second bevel gears 40 mesh for transmission.

[0032] In this embodiment, while the motor 24 drives the first stirring rod 21 to rotate (which is then transmitted to the second stirring rod 22 in sequence), the power is transmitted through the first transmission shaft 35 to the fifth transmission belt group 37 (second stirring rod 22 - second bevel gear 40 - second transmission shaft 38 - first bevel gear 39 - first transmission shaft 35). The fifth transmission belt group 37 drives any one of the rotating shafts in the premixing chamber 4 to rotate. This rotating shaft transmits the rotational power through the fourth transmission belt group 36 to the remaining rotating shafts in the maturation chamber 5 and the storage chamber 6 in sequence, so that the scraper plates 34 in the premixing chamber 4, maturation chamber 5 and storage chamber 6 rotate synchronously in the same direction. The scraper plates 34 are in close contact with the bottom of each chamber and perform a rotating scraping action to prevent the solid raw materials deposited at the bottom of the chamber from solidifying and sticking to the equipment. By setting up a first drive shaft 35, a second drive shaft 38, a first bevel gear 39, a second bevel gear 40, a fifth drive belt group 37, and a fourth drive belt group 36 in coordination, a linkage transmission system is constructed that simultaneously distributes the stirring power to the stirring rod and the bottom scraper plate 34. This allows the bottom scraper plate 34 to rotate and scrape synchronously while the premixing chamber 4, maturation chamber 5, and storage chamber 6 are performing stirring operations, thus solving the problems of solid raw materials settling and hardening at the bottom of the chamber and maturation flocs accumulating at the bottom.

[0033] In a further preferred embodiment of the present invention, the storage structure includes a storage cylinder 41 fixed to the top of the mixing box 2, a discharge cylinder extending into the premixing bin 4 is installed at the bottom of the storage cylinder 41, a crankshaft 42 is rotatably installed in the storage cylinder 41, a connecting rod 43 is rotatably sleeved on the crankshaft 42, a metering cylinder 44 is hinged to the connecting rod 43, the metering cylinder 44 is in sliding contact with the interior of the discharge cylinder, the metering cylinder 44 is provided with a metering notch, and an encoder 45 is installed on the storage cylinder 41 and connected to the crankshaft 42.

[0034] In this embodiment, during feeding, the operator pours solid raw materials into the storage cylinder 41 fixed at the top of the mixing tank 2. The raw materials in the storage cylinder 41 are continuously replenished into the discharge cylinder under the action of gravity. When the system starts the automatic feeding program, the motor 24 drives the crankshaft 42 to rotate at a constant speed inside the storage cylinder 41. The crankshaft 42 drives the connecting rod 43, which is rotated and sleeved on it, to perform a circular motion to stir the raw materials. At the same time, the connecting rod 43 pulls the metering cylinder 44 to slide back and forth in a linear motion inside the discharge cylinder through the hinge point. Each time the metering cylinder 44 slides to the discharge cylinder... At the bottom, the metering notch on it is aligned with the outlet of the discharge cylinder. The metered solid raw material received in the metering notch falls into the premixing chamber 4 below under the action of gravity. The metering cylinder 44 then rises upward with the connecting rod 43. The metering notch is separated from the outlet of the discharge cylinder and is filled with new raw material during the rising process. Each time the crankshaft 42 completes one rotation, the metering cylinder 44 completes one metering feeding and discharging cycle. The encoder 45 transmits the pulse signal of each cycle to the PLC control cabinet. The control cabinet automatically calculates the required dosing frequency according to the set dosing concentration and water flow rate. By installing a crankshaft 42, connecting rod 43, metering cylinder 44 and encoder 45 inside the storage cylinder 41, a purely mechanical structure replaces the traditional screw feeder or weighing feeder, eliminating the problems of uneven feeding and blockage caused by bridging, bridging or moisture agglomeration of powder raw materials. The metering notch on the metering cylinder 44 receives a fixed volume of solid raw material in each reciprocating stroke. With the real-time monitoring of the number of rotations of the crankshaft 42 by the encoder 45, closed-loop control of the solid raw material feeding amount is realized.

[0035] In a further preferred embodiment of the present invention, a support frame 49 is fixed on the preparation box 2, and a limit block 50 is rotatably mounted on the support frame 49 via an mounting shaft. A sixth transmission belt group 51 is provided between the mounting shaft and the crank shaft 42. A support plate 52 is fixed on the first stirring rod 21, and a first electric telescopic rod 53 is mounted on the support plate 52. A limit cylinder 54 for transmission is fixed on the output rod of the first electric telescopic rod 53 and sleeved outside the limit block 50.

[0036] In this embodiment, when the preparation box 2 starts the ammonia nitrogen flocculant preparation operation, the first stirring rod 21 rotates at high speed in the premixing chamber 4, and the support plate 52 rotates synchronously. The support plate 52 drives the first electric telescopic rod 53 installed on it to make a circular motion around the axis of the first stirring rod 21, which drives the limiting cylinder 54 to move along the circular trajectory. When the limiting cylinder 54 is fitted into the outside of the limiting block 50 and in close contact with its outer wall, the friction of the inner wall of the limiting cylinder 54 drives the limiting block 50 to rotate around the mounting shaft on the support frame 49. The rotational power is transmitted to the crankshaft 42 through the sixth transmission belt group 51, which drives the crankshaft 42 to start rotating in the storage cylinder 41. The metering cylinder 44 then starts the reciprocating feeding and discharging action. When no feeding is needed, the first electric telescopic rod 53 retracts the output rod under the action of the control signal, and the limiting cylinder 54 completely disengages from the limiting block 50. By setting an intermittent mechanical linkage feeding drive mechanism on the support frame 49, consisting of a limiting block 50, a limiting cylinder 54, a first electric telescopic rod 53, a support plate 52, and a sixth transmission belt group 51, the feeding action of solid raw materials is mechanically coupled with the stirring operation of the first stirring rod 21. Only when the first stirring rod 21 is running can the limiting cylinder 54 drive the crankshaft 42 to rotate and feed raw materials through intermittent engagement. From a mechanical principle perspective, this eliminates the problem of agglomeration and waste caused by raw materials being added to the premixing chamber 4 without stirring.

[0037] In a further preferred embodiment of the present invention, the liquid storage tank 6 is provided with a level gauge 48 for detecting the water level, the maturation tank 5 is provided with staggered partitions 47 to ensure the maturation time of the raw materials, the liquid storage tank 6 is provided with a guide plate for reducing the impact force of overflow liquid, and the premixing tank 4, the liquid storage tank 6 and the maturation tank 5 are all provided with a drain pipe 46 for outputting liquid. The drain pipe 46 located on the liquid storage tank 6 is connected to the inlet end of an external metering pump, and the top of the premixing tank 4 is provided with an inlet connected to the drain end of an external water pump.

[0038] In this embodiment, an external water pump (with a flow meter and timer to calculate the amount of clean water added) injects clean water into the premixing chamber 4 through the inlet. After the solid raw materials are dissolved and stirred in the premixing chamber 4, the mother liquor flows into the maturation chamber 5 through the overflow connector 7. The mother liquor flows through the S-shaped meandering channel formed by the staggered baffles 47 in the maturation chamber 5. During the meandering flow, the residence time of the raw materials in the maturation chamber 5 is sufficiently extended to ensure full maturation. The maturated mother liquor continues to flow into the storage chamber 6 through the overflow connector 7. The liquid guide plate installed in the storage chamber 6 forms a buffer and guide for the overflowing mother liquor to prevent violent fluctuations in the liquid level. The level gauge 48 continuously monitors the liquid level in the storage chamber 6 and feeds it back to the control system. When the liquid level in the storage chamber 6 drops to a set height, the continuous preparation program is started. By setting staggered baffles 47 in the maturation chamber 5, the mother liquor is forced to form a meandering flow path when flowing through the maturation chamber 5. This effectively extends the residence time of the raw materials in the maturation chamber 5 without increasing the chamber volume, ensuring the full reaction and maturation of flocculant molecules and ammonia nitrogen removal agent, and improving the quality of the solution. The liquid level gauge 48 in the storage chamber 6 enables real-time online monitoring of the finished mother liquor level, avoiding the problems of dry running of the metering pump due to too low a liquid level or overflow waste due to too high a liquid level.

[0039] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments: In another embodiment of the present invention, a protective door 55 for sealing the preparation box 2 is detachably installed on the preparation box 2. A sealing gasket is provided on the side of the protective door 55 near the preparation box 2. The sealing gasket is in contact with the outer wall of the preparation box 2 and the baffle 3. A flushing pipe 59 is installed on the protective door 55 by a clamp. The flushing pipe 59 is connected to an external flushing device. The flushing pipe 59 is provided with multiple branch pipes extending into the preparation box 2.

[0040] In this embodiment, after the ammonia nitrogen flocculant preparation is completed, the operator connects the flushing pipe 59 to the external flushing equipment. After the equipment is started, the high-pressure cleaning fluid enters through the flushing pipe 59 and is distributed to each branch pipe. The ends of the multiple branch pipes extend to different height areas inside the preparation tank 2. The high-pressure cleaning fluid sprays from the ends of the branch pipes in a multi-point spray pattern to flush the inner wall of the preparation tank 2 and the anti-backflow structure 16. By installing a removable protective door 55 with a sealing gasket on the preparation tank 2, a reliable airtight seal is formed in the working state of the preparation tank 2 by using the double contact surface sealing method of the sealing gasket, the outer wall of the preparation tank 2 and the baffle 3, which effectively prevents raw material leakage. By setting up a flushing pipe 59 in conjunction with multiple branch pipes extending into the preparation tank 2, multi-point coverage spraying of the inside of the preparation tank 2 is realized, so that the preparation tank 2 can be quickly and thoroughly cleaned when changing the reagent formula and shutting down.

[0041] In another embodiment of the present invention, an exhaust pipe 56 connected to the exhaust end of an external air pump is installed on the protective door 55. A connecting cylinder 57 is fixed on the exhaust pipe 56. The connecting cylinder 57 is sleeved outside the liquid inlet of the three-way pipe 8 and is used to block or unclog the three-way pipe 8 using airflow. A telescopic cylinder 58 is fixed inside the preparation box 2. The output rod of the telescopic cylinder 58 is connected to the connecting cylinder 57 and is used to adjust the connection state between the connecting cylinder 57 and the three-way pipe 8. A sealing ring is provided inside the connecting cylinder 57. A one-way valve is provided on the exhaust pipe 56 to prevent the raw material liquid from entering the pipeline.

[0042] In this embodiment, when the preparation box 2 completes the preparation operation, the telescopic rod cylinder 58 extends so that the connecting cylinder 57 is sleeved outside the three-way pipe 8. The external air pump equipment is started, and high-pressure gas is delivered to the connecting cylinder 57 and the three-way pipe 8 through the exhaust pipe 56. The residual viscous liquid in the pipe is blown out by the pneumatic impact force (intermittent air blowing, without sufficient continuous pressure to make the movable ball 9 rise and block the three-way pipe 8, the gas can be discharged), completing the unblocking operation of the three-way pipe 8 (if the pipe is not cleaned, the raw materials in the pipe will crystallize and block it after repeated accumulation). By integrating a pneumatic unblocking mechanism consisting of an exhaust pipe 56, a connecting cylinder 57, a telescopic rod cylinder 58, and a one-way valve into the protective door 55, the high-pressure airflow generated by an external air pump is used to automatically unblock the three-way pipe 8, effectively preventing the three-way pipe 8 from becoming blocked and affecting the overflow.

[0043] In another embodiment of the present invention, the spring cylinder 31 includes a spring fixed on the support shaft frame 30 and a first rubber telescopic cylinder sleeved on the spring. The spring is provided with a limiting telescopic rod. The telescopic rod cylinder 58 includes a second electric telescopic rod fixed in the preparation box 2 and a second rubber telescopic cylinder sleeved on the second electric telescopic rod.

[0044] In this embodiment, when performing unblocking operations, the second electric telescopic rod extends its output rod after receiving a control signal. The output rod pushes the connecting cylinder 57 to move towards the liquid inlet of the three-way pipe 8, so that the connecting cylinder 57 is sleeved on the outside of the three-way pipe 8. By setting up a spring cylinder 31, which is composed of a spring, a limiting telescopic rod, and a first rubber telescopic cylinder, and a telescopic rod cylinder 58, which is composed of a second electric telescopic rod and a second rubber telescopic cylinder, the moving parts are provided with dual protection that combines elastic buffering and corrosion protection, reducing the maintenance cost of the equipment throughout its entire life cycle.

[0045] In summary, compared with related technologies, this device, through the setting of multi-compartment overflow connection and anti-backflow structure 16, combined with air pressure balance and anti-splash structure, achieves stable delivery and independent cleaning of the liquid, improving the quality of flocculant preparation. It utilizes a single power source to construct a multi-stage differentiated speed stirring and bottom scraping linkage system, and with the help of a ratchet clutch mechanism, it meets the different process requirements of premixing, maturation and storage, effectively preventing floc destruction and raw material deposition. The pure mechanical quantitative feeding and stirring linkage feeding mechanism eliminates the problems of feeding blockage and agglomeration without stirring, ensuring the accuracy of addition. At the same time, it integrates multi-point high-pressure flushing and pneumatic automatic unblocking mechanism, improving the self-cleaning and anti-clogging capabilities of the equipment.

[0046] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies (motor 24 can be a YVF2-132M-4 frequency converter motor or Huichuan SV660 series servo motor to achieve forward and reverse rotation control; encoder 45 can be an Omron E6B2-CWZ6C incremental rotary encoder; the first electric telescopic rod 53 and the second electric telescopic rod inside the telescopic rod cylinder 58 can be Jeston JL800 series or Thomson Electrak series electric actuators; level gauge 48 is usually equipped with an Endress+Hauser Prosonic FMU30 ultrasonic level gauge or a Siemens SITRANS Probe). The LU radar level gauge can be connected to an external metering pump such as a Milton Roy GM series mechanical diaphragm metering pump, an external water pump such as a Grundfos CR series vertical multistage centrifugal pump, and an external air pump such as an Atlas Copco GA series screw air compressor or a Shenghong EHS series high-pressure vortex air pump. External flushing equipment can be an Italian AR series high-pressure plunger pump or a Black Cat high-pressure cleaning pump. These are all easily achievable by those skilled in the art and require no further explanation. This invention does not involve improvements to the software or methods. The solution also includes an electrical control cabinet installed on the equipment. During use, each piece of electrical equipment can be started individually through the control cabinet. The power connection methods for each piece of equipment are existing mature technologies and are well-known to those skilled in the art, and will not be elaborated upon here.

[0047] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A device for preparing and treating ammonia nitrogen flocculants for wastewater treatment, characterized in that, include: Base; A preparation box fixed on the top of the base for providing space for the preparation of ammonia nitrogen flocculant is provided. The preparation box is divided into a premixing chamber, a maturation chamber and a storage chamber by baffles. The two baffles are located between the premixing chamber and the maturation chamber, and between the maturation chamber and the storage chamber, respectively. An overflow connector, fixed to the two baffles respectively, is used to provide an overflow channel. A backflow prevention structure is detachably mounted on each of the two baffles to prevent liquid backflow. A storage structure for storing solid raw materials is installed on top of the preparation box.

2. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 1, characterized in that, The overflow connector includes a T-shaped pipe fixed to the baffle plate, an exhaust port located outside the mixing tank on the T-shaped pipe for balancing the internal air pressure of the pipe, a movable ball placed inside the T-shaped pipe for sealing the exhaust port when the pipe is impacted by a large flow rate to prevent a large amount of raw material liquid from spraying out, multiple protrusions installed inside the T-shaped pipe to reduce the contact area between the movable ball and the inner wall of the T-shaped pipe, and a limiting rod inside the T-shaped pipe for supporting the movable ball.

3. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 2, characterized in that, A support cylinder is fixed to the top of the preparation box, and a support rod is threaded into the support cylinder. A protective cap is rotatably installed on the top of the support rod. The protective caps are arranged in groups and are respectively located directly above the two exhaust ports. A collection cylinder for collecting overflow liquid is fixed to the top of the preparation box and sleeved outside the three-way pipe.

4. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 2, characterized in that, The backflow prevention structure includes a mounting bracket detachably mounted on the baffle, a plug plate hinged to the mounting bracket via a soft connecting piece, the plug plate being in contact with the drain end of the tee pipe to prevent liquid backflow, and a spring plate detachably mounted between the plug plate and the mounting bracket.

5. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 1, characterized in that, The premixing chamber, maturation chamber, and storage chamber are respectively equipped with a first stirring rod, a second stirring rod, and a third stirring rod. The second stirring rods are arranged in groups. The first, second, and third stirring rods all extend outside the preparation box. A first transmission belt group is provided between two second stirring rods for transmission. A second transmission belt group is provided between the first stirring rod and any one of the second stirring rods. The preparation box is equipped with a ratchet drive shaft connected to the third stirring rod. A third transmission belt group is provided between the ratchet drive shaft and another second stirring rod. A motor is fixed on the base. The output shaft of the motor is connected to the first stirring rod through a coupling. The transmission ratio between the first stirring rod and the second stirring rod is not less than 10:1, and the transmission ratio between the two second stirring rods and the third stirring rod is 1:

1.

6. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 5, characterized in that, The ratchet drive shaft includes a fixed frame fixed on the mixing box, a support shaft frame rotatably mounted on the fixed frame, a third drive belt assembly mounted on the support shaft frame, a spring sleeve fixed on the support shaft frame, a ratchet disc mounted on the spring sleeve, and a ratchet seat fixed on the third stirring rod and meshing with the ratchet disc. The ratchet disc, spring sleeve, and ratchet seat cooperate to drive the motor when the output shaft rotates forward and disconnect the drive when it rotates in reverse.

7. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 6, characterized in that, Each of the premixing chamber, maturation chamber, and storage chamber is equipped with a scraper plate that is rotatably mounted on a rotating shaft. Multiple rotating shafts extend outside the preparation box, and a fourth transmission belt assembly for transmission is provided between the multiple rotating shafts. A first transmission shaft and a second transmission shaft are rotatably mounted on the preparation box. A fifth transmission belt assembly is provided between any one of the rotating shafts and the first transmission shaft. A first bevel gear is fixed on both the first and second transmission shafts, and two first bevel gears mesh with each other for transmission. A second bevel gear is fixed on both the second transmission shaft and the third stirring rod, and two second bevel gears mesh with each other for transmission.

8. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 5, characterized in that, The storage structure includes a storage cylinder fixed to the top of the mixing tank, a discharge cylinder extending into the premixing chamber installed at the bottom of the storage cylinder, a crankshaft rotatably installed inside the storage cylinder, a connecting rod rotatably sleeved on the crankshaft, a metering cylinder hinged to the connecting rod, the metering cylinder slidingly contacting the interior of the discharge cylinder, the metering cylinder having a metering notch, and an encoder installed on the storage cylinder and connected to the crankshaft.

9. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 8, characterized in that, A support frame is fixed on the mixing box. A limit block is rotatably mounted on the support frame via an mounting shaft. A sixth transmission belt assembly is provided between the mounting shaft and the crank shaft. A support plate is fixed on the first stirring rod. A first electric telescopic rod is mounted on the support plate. A limit cylinder for transmission is fixed on the output rod of the first electric telescopic rod and sleeved outside the limit block.

10. The wastewater treatment ammonia nitrogen flocculant preparation and treatment device as described in claim 1, characterized in that, The storage tank is equipped with a level gauge for detecting water level. The maturation tank is equipped with staggered partitions to ensure the maturation time of the raw materials. The storage tank is equipped with a guide plate to reduce the impact force of overflow liquid. The premixing tank, storage tank and maturation tank are all equipped with drain pipes for discharging liquid. The drain pipe on the storage tank is connected to the inlet of an external metering pump. The top of the premixing tank is equipped with an inlet that is connected to the drain of an external water pump.

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