A sludge thickening treatment device

Abstract

This invention discloses a sludge thickening and treatment device, including a tank, a stirring shaft rotatably fitted inside the tank, stirring blades provided on the side wall of the stirring shaft, and a filter screen also provided inside the tank; a lift pump is provided on the tank; the filter screen includes a filtration section and a support section; a dewatering mechanism is provided in the support section, and a drain outlet is provided on the side wall of the support section. When flocs form inside the tank, the sludge inside the tank can be lifted to the top of the tank by the lift pump; under the action of gravity, the flocs are trapped on the filter screen, and the liquid flows out from the filtration section and falls into the tank for further conditioning; finally, the flocs flow into the support section, and then the dewatering mechanism can squeeze the flocs to achieve dewatering, and the squeezed filtrate is discharged back into the tank through the drain outlet for further conditioning. This invention can achieve simultaneous conditioning and dewatering of sludge, which not only reduces the footprint of wastewater treatment equipment, but also improves the treatment efficiency of sludge flocculation and dewatering.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular, to a sludge thickening treatment device. Background Technology

[0002] Sludge is a byproduct of wastewater treatment, an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, and other substances. A sludge thickener is a center-driven, continuous or intermittent thickening and clarification device. It is primarily used for sludge with a concentration of 1% or less, increasing its solids content, i.e., sludge concentration. After thickening, the effluent concentration is above 3%, facilitating subsequent mechanical dewatering and improving its efficiency and effectiveness.

[0003] Currently, most sludge thickeners focus only on sludge flocculation, while the flocculated sludge relies entirely on subsequent mechanical dewatering equipment. Furthermore, the filtrate discharged during mechanical dewatering needs to be pumped back into the sludge thickener through an additional flow path for further reaction. There is an urgent need for a sludge thickening device that can simultaneously achieve dewatering to improve the efficiency of sludge flocculation and dewatering. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sludge thickening and treatment device.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A sludge thickening treatment device includes a tank, a stirring shaft rotatably mounted inside the tank, stirring blades disposed on the side wall of the stirring shaft, and a filter screen disposed above the stirring blades inside the tank. A lift pump is mounted on the tank, adapted to lift flocculent material from the bottom of the tank and feed it to the top of the tank. The filter screen includes a filtration section and a support section, the filtration section being adapted to be inclined towards the support section to guide the flocculent material to the support section. A dewatering mechanism is disposed in the support section, and a drain outlet is disposed on the side wall of the support section. The dewatering mechanism is adapted to cause the flocculent material in the support section to be compressed, and the filtrate is discharged back into the bottom of the tank through the drain outlet.

[0007] Preferably, the supporting part includes a supporting barrel, the stirring shaft passes through the supporting barrel, and the dewatering mechanism includes spiral blades disposed on the side wall of the stirring shaft; the bottom of the supporting barrel is provided with a discharge channel, which is connected to the side wall of the tank; the spiral blades are adapted to squeeze and push the flocculants to be discharged to one side of the discharge channel.

[0008] Preferably, the bearing part includes a bearing groove, the dehydration mechanism includes a plurality of pressure plates arranged side by side in the bearing groove, and a driving mechanism is also provided in the bearing groove, the driving mechanism being adapted to drive the plurality of pressure plates to press against each other or separate from each other.

[0009] Preferably, the supporting tank includes a storage chamber and a dewatering chamber arranged sequentially along the inclined direction of the filter screen, and a plurality of pressure plates are disposed in the dewatering chamber; filter grooves are constructed on the side walls of the pressure plates, adjacent filter grooves are joined to form a filtration chamber, and the filter grooves are covered with filter cloth; liquid inlet holes are constructed on the pressure plates and communicate with the filter grooves, and a liquid inlet pipe is connected between the storage chamber and the liquid inlet holes; a liquid outlet hole is provided at the bottom of the pressure plates and communicates with the filter grooves, and a plurality of liquid outlet holes are joined to form a liquid outlet channel; a liquid outlet pipe is provided on the pressure plates located at the ends and connected to the liquid outlet channel, and the liquid outlet pipe passes through the side wall of the supporting tank; a pumping mechanism is provided in the storage chamber, and the pumping mechanism is adapted to pump the flocculants in the storage chamber into the liquid inlet pipe.

[0010] Preferably, the driving mechanism includes a drive shaft rotatably disposed within the dehydration chamber, a plurality of spiral grooves being formed on the side wall of the drive shaft, the pressure plate being slidably adapted to the dehydration chamber, and a connecting shaft being provided on the pressure plate, the connecting shaft being adapted to the corresponding spiral groove; one end of the liquid inlet is connected to the end face of the connecting shaft, and the other end of the liquid inlet is connected to the filter tank; the liquid inlet pipeline includes a feed channel constructed within the drive shaft, and a pumping pipe coaxially disposed at the end of the drive shaft, connecting to the feed channel and the storage chamber; a connecting hole is formed on the groove surface of the spiral groove, connecting to the feed channel, and when the plurality of pressure plates are pressed together, the connecting hole is connected to the liquid inlet.

[0011] Preferably, the pumping mechanism includes a pumping plate that is vertically ejectible and disposed above the storage chamber.

[0012] Preferably, the driving mechanism further includes a first bevel gear and a second bevel gear connected to the driving shaft via a key. The first bevel gear and the second bevel gear are arranged facing each other, and each of the first bevel gear and the second bevel gear is connected to an elastic element. A transmission shaft is also rotatably arranged on the filter screen. The transmission shaft is poweredly connected to the stirring shaft, and a third bevel gear is arranged on the transmission shaft. The third bevel gear can mesh with the first bevel gear or the second bevel gear. A fork mechanism is also provided on the filter screen. The fork mechanism is adapted to push the first bevel gear and the second bevel gear, thereby changing the meshing state of the two gears with the third bevel gear.

[0013] Preferably, the pumping mechanism further includes a drive disc disposed on the transmission shaft, and a plurality of drive protrusions are disposed circumferentially on the bottom of the drive disc; an elastic element is connected to the pumping plate, and when the drive disc rotates, the drive protrusions can push the pumping plate outward.

[0014] Preferably, the pump feed plate includes a main body and a drive block that slides laterally on the top of the main body, and both the main body and the drive block are connected to elastic elements; an elastic element is also connected to the frame of the fork mechanism; a drive pipe is connected to the liquid inlet pipe, and a first ejector and a second ejector are connected to the drive pipe; wherein, the first ejector is opposite to the drive block, and the second ejector is opposite to the frame of the fork mechanism; when the pressure in the liquid inlet pipe exceeds a threshold, the drive pipe is pressurized and thereby drives the first ejector and the second ejector to eject.

[0015] Preferably, a transfer frame is slidably fitted above the filter screen in a horizontal direction, and a mounting frame is flexibly provided on the transfer frame in a vertical direction. A striking rod is provided at the bottom of the mounting frame, and elastic elements are connected to both the transfer frame and the mounting frame. When the mounting frame is pushed out vertically, the striking rod can strike the pressure plate. The ejection shaft of the second ejector includes a first driving end and a second driving end opposite each other. When the second ejector is ejected, the first driving end can push the driving block and the driving protrusion to misalign, and the second driving end can push the transfer frame to transfer, so that the mounting frame and the driving protrusion are opposite each other.

[0016] The beneficial effects of this invention are:

[0017] 1. When flocculation occurs inside the tank, the sludge can be lifted to the top of the tank using a booster pump. Under gravity, the flocculation is trapped on the filter screen, while the liquid flows out of the filtration section and falls back into the tank for further conditioning. Finally, the flocculation flows into the support section, where the dewatering mechanism squeezes the flocculation to achieve dewatering. The squeezed filtrate is then discharged back into the tank through the drain outlet for further conditioning. Compared with existing technologies, this invention enables simultaneous sludge conditioning and dewatering, and the filtrate discharged during dewatering can be directly discharged into the tank for conditioning, reducing the footprint of the wastewater treatment equipment to some extent and improving the efficiency of sludge flocculation and dewatering.

[0018] 2. The stirring shaft drives the spiral blades to rotate, thereby achieving the compression and dewatering of the flocculants in the carrying tank. The dewatering mechanism of this invention makes full use of the original power of the stirring shaft as the driving force, and has high mechanical reliability.

[0019] 3. The flocculants are squeezed and dehydrated by the mutual pressing of several pressure plates in the bearing tank.

[0020] 4. The flocculants in the storage chamber are pumped into a filter chamber formed by pressing several pressure plates through the pump pipe, feed channel, connecting hole, and inlet hole. Under pressure, the filtrate in the flocculants in the filter chamber is discharged back into the tank through the outlet pipe, thereby forming a filter cake in the filter chamber. Furthermore, the drive mechanism and pumping mechanism of this invention utilize the existing power of the stirring shaft, resulting in high mechanical reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a helical blade;

[0022] Figure 2 This is a schematic diagram of the baffle structure;

[0023] Figure 3 This is a schematic diagram of the pressure plate structure;

[0024] Figure 4 This is a schematic diagram of the filter chamber structure;

[0025] Figure 5 This is a schematic diagram of the connecting shaft.

[0026] Figure 6 for Figure 3 Enlarged view of part A;

[0027] Figure 7 for Figure 6 Enlarged view of part B;

[0028] Figure 8 for Figure 6 Enlarged view of part C.

[0029] Reference numerals: 1. Tank; 2. Agitator shaft; 3. Agitator blades; 4. Filter screen; 5. Booster pump; 6. Filtration section; 7. Support section; 8. Dewatering mechanism; 9. Drain outlet; 10. Support tank; 11. Spiral blades; 12. Discharge channel; 13. Support trough; 14. Pressure plate; 15. Drive mechanism; 16. Storage chamber; 17. Dewatering chamber; 18. Filter tank; 19. Filter cavity; 20. Filter cloth; 21. Liquid inlet; 22. Liquid inlet pipe; 23. Liquid outlet; 24. Liquid outlet channel; 25. Liquid outlet pipe; 26. Pumping mechanism; 27. Drive shaft; 28. Spiral 29. Groove; 30. Connecting shaft; 31. Feed channel; 32. Pump liquid pipe; 33. Pump material plate; 34. First bevel gear; 35. Drive shaft; 36. Third bevel gear; 37. Shift fork mechanism; 38. Drive disc; 39. Drive protrusion; 40. Main body; 41. Drive block; 42. Drive pipeline; 43. First ejector; 44. Second ejector; 45. Transfer frame; 46. Mounting frame; 47. Striking rod; 48. First drive end; 49. Second drive end; 50. Baffle; 51. Frame; 52. Pulling arm; 53. Response shaft. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In a typical sludge thickening treatment device, the entire unit includes a tank 1 into which sludge to be conditioned can be conveyed, for example, through a feed pipe. A suitable amount of flocculant can also be added to the tank 1, and a stirring shaft 2, driven by a motor, is fitted inside the tank 1. The stirring shaft 2 drives the stirring blades 3 to rotate, thereby mixing and stirring the sludge and flocculant inside the tank 1, allowing the sludge to coagulate and form flocs more quickly.

[0032] However, the formation of flocs is only a preliminary concentration of sludge, and the flocs usually need to be introduced into subsequent mechanical dewatering equipment for further concentration. During dewatering, the flocs will squeeze out filtrate, which needs to be pumped back into tank 1 through pipelines for further conditioning treatment.

[0033] In this regard, such as Figures 1 to 8As shown, this disclosure proposes a sludge thickening treatment device, in which a filter screen 4 is disposed above the stirring blade 3 inside the tank 1. The filter screen 4 is arranged at an angle, for example, it may include a filtration section 6 and a support section 7 in sequence along the angle. The filtration section 6 may be constructed with filter holes, while the support section 7 is not constructed with filter holes, so as to realize the receiving and dewatering of flocs as described below.

[0034] For example, a lift pump 5 is installed on the tank 1, which can lift the flocculent material formed at the bottom of the tank 1 to the top of the tank 1. In particular, the outlet of the lift pump 5 can be opposite to the filter section 6, so that the flocculent material in the sludge will be trapped on the filter section 6, while the liquid in the sludge will flow out from the filter section 6 under the action of gravity and fall into the tank 1 for further conditioning. And since the filter screen 4 is arranged at an angle, the flocculent material will gradually flow into the support section 7 under the guidance of the filter section 6 under the action of gravity.

[0035] The support section 7 is also equipped with a dehydration mechanism 8. The dehydration mechanism 8 can drive the flocs in the support section 7 to be squeezed to achieve dehydration. The squeezed filtrate can be discharged back into the tank 1 through the drain port 9 on the side wall of the support section 7 for further conditioning.

[0036] In some embodiments, the support portion 7 may include a support tank 10 coaxially disposed with the stirring shaft 2. Figure 1 As can be seen, the stirring shaft 2 extends through the support tank 10 and into the bottom of the tank body 1. The dewatering mechanism 8 may include a spiral blade 11 disposed on the side wall of the stirring shaft 2, and the spiral blade 11 is correspondingly located inside the support tank 10. In addition, a discharge channel 12 is provided at the bottom of the support tank 10, for example, the discharge channel 12 may extend laterally and penetrate through the side wall of the tank body 1.

[0037] While the stirring shaft 2 rotates to agitate the sludge, the spiral blades 11 also rotate inside the support tank 10. In this way, the spiral blades 11 squeeze and pump the flocs that fall into the support tank 10 towards the discharge channel 12, thereby achieving dewatering of the flocs. During this process, the filtrate squeezed out by the flocs can be discharged from the drain port 9 on the side wall of the support tank 10.

[0038] For example, a spiral groove 28 that cooperates with the spiral blade 11 can be provided on the inner wall of the bearing barrel 10. By providing the spiral groove 28, the distance between the spiral blade 11 and the inner wall of the bearing barrel 10 can be changed intermittently, so that a more significant extrusion chamber can be formed between the two, thereby achieving a better extrusion effect on the flocculants.

[0039] In a preferred embodiment, the discharge channel 12 may also be arranged in a downward slope, which allows the dehydrated flocs falling into the discharge channel 12 to be discharged more smoothly and quickly from the discharge channel 12 and the tank 1 under the action of gravity.

[0040] See Figure 2 Alternatively, the support unit 7 may include a support tank 13, while the dewatering mechanism 8 may include several pressure plates 14 arranged side by side within the support tank 13. The support tank 13 may also include a drive mechanism 15 for driving the pressure plates 14 to press against each other or separate from each other. It is understood that when the flocculent falls into the support tank 13, the pressure plates 14 pressing against each other can squeeze the flocculent between adjacent pressure plates 14, thereby achieving dewatering of the flocculent through compression.

[0041] In a possible example, the bottom of the carrying tank 13 may be provided with a discharge channel 12 as described above, and above the discharge channel 12, a baffle 50 is also hinged inside the carrying tank 13. For example, the baffle 50 can swing between a first position and a second position via a drive such as a motor. When the baffle 50 is in the first position, the baffle 50 can block the bottom of the carrying tank 13, so that the flocculants can be kept in the carrying tank 13; while when the baffle 50 is in the second position, the baffle 50 opens the passage between the carrying tank 13 and the discharge channel 12, so that the flocculants after extrusion and dewatering can be discharged downward into the discharge channel 12, and discharged from the tank 1 along the discharge channel 12, for example, under the action of gravity.

[0042] For example, the drive mechanism 15 may include an electric cylinder or a pneumatic cylinder connected to each pressure plate 14, and the mutual pressing or separation of the pressure plates 14 can be achieved through the cooperative operation of several electric cylinders or pneumatic cylinders. In a possible example, only two pressure plates 14 may be provided, in which case the mutual pressing and separation of the two pressure plates 14 can be achieved, for example, through a lead screw with reverse double threads.

[0043] See Figures 3 to 8 In another example, the support trough 13 may include a storage chamber 16 and a dewatering chamber 17 arranged sequentially along the inclined direction of the filter screen 4. The aforementioned pressure plates 14 are disposed within the dewatering chamber 17.

[0044] See Figure 4 In this example, the pressure plate 14 is preferably configured to have filter grooves 18 on its sidewalls, so that when adjacent pressure plates 14 are joined together, the two filter grooves 18 are joined together to form a filter cavity 19. Furthermore, filter cloth 20 may also be covered on the filter grooves 18, so that the filter cavity 19 can be effectively defined by the relatively sealed filter cloth 20 on all sides.

[0045] The pressure plate 14 may also be equipped with an inlet hole 21 connected to the filter tank 18, and an inlet pipe 22 is connected between the inlet hole 21 and the storage chamber 16. The storage chamber 16 is also equipped with a pumping mechanism 26 that can pump the flocculants in its chamber into the inlet pipe 22. It can be imagined that as the pumping mechanism 26 pumps, the flocculants in the storage chamber 16 will flow into the filter chamber 19 through the inlet pipe 22 and the inlet hole 21.

[0046] The bottom of the pressure plate 14 is also provided with a liquid outlet 23 connected to the filter tank 18. For example, several liquid outlets 23 can be combined to form a liquid outlet channel 24, and a liquid outlet pipe 25 connected to the liquid outlet channel 24 can also be provided on the pressure plate 14 at the end. After the above-mentioned flocculants are continuously pumped into the filter chamber 19, under the action of pressure, the flocculants are intercepted in the filter chamber 19 by the filter screen 4 and form a filter cake, while the squeezed filtrate is discharged from the liquid outlet pipe 25 through the liquid outlet 23 and the liquid outlet channel 24. Correspondingly, the liquid outlet pipe 25 can penetrate the side wall of the support tank 13, and the liquid outlet pipe 25 can be connected to the drain port 9 at the side wall of the support tank 13, so that the squeezed filtrate can be discharged into the tank 1 in time for further conditioning.

[0047] For example, when the filter cake in the filter chamber 19 is full, it can drive several pressure plates 14 to separate from each other, and then the filter cake will automatically fall into the discharge channel 12 under the action of gravity and be discharged.

[0048] The pumping mechanism 26 may include a pumping plate 32 vertically ejectible above the storage chamber 16. For example, the pumping plate 32 may be ejected by an electric cylinder or a pneumatic cylinder, or by using the existing power of the stirring shaft 2 as the driving force, as will be described below. When the pumping plate 32 ejects, it squeezes the flocculants in the storage chamber 16, causing the flocculants to be pushed into the filter chamber 19 under pressure.

[0049] In a preferred embodiment, the drive mechanism 15 includes a drive shaft 27 rotatably disposed within the dehydration chamber 17. The sidewall of the drive shaft 27 is provided with a plurality of spiral grooves 28, for example, each spiral groove 28 corresponds one-to-one with a plurality of pressure plates 14. The pressure plates 14 are slidably fitted within the dehydration chamber 17, and each pressure plate 14 is also provided with a connecting shaft 29 that engages with the corresponding spiral groove 28. It can be understood that the connecting shaft 29 and the spiral groove 28 cooperate to form a cam mechanism. When the drive shaft 27 rotates under the drive of a driving component such as a motor, the spiral grooves 28 engage with the connecting shaft 29, causing the pressure plates 14 to slide. For example, when the drive shaft 27 rotates forward, the pressure plates 14 slide to press against each other; while when the drive shaft 27 rotates in reverse, the pressure plates 14 slide to separate from each other.

[0050] The aforementioned liquid inlet pipe 22 may include a feed channel 30 constructed within the drive shaft 27, and a pump pipe 31 coaxially connected to the feed channel 30 and the storage chamber 16 is also provided at the end of the drive shaft 27. The pump pipe 31 and the drive shaft 27 can be rotatably adapted, so that the pump pipe 31 remains relatively stationary when the drive shaft 27 rotates, and a stable passage is maintained between the pump pipe 31 and the feed channel 30. The aforementioned liquid inlet hole 21 is adapted to have one end connected to the end face of the connecting shaft 29 and the other end connected to the filter tank 18. Correspondingly, a connecting hole connected to the feed channel 30 is also provided on the end face of the spiral groove 28. For example, this disclosure may have the following operating process:

[0051] 1. The flocculent material at the bottom of the tank 1 is lifted by the lifting pump 5 and fed into the filter section 6. The trapped flocculent material will slide into the storage chamber 16.

[0052] 2. Under the pumping action of the pumping mechanism 26, the flocculants in the storage chamber 16 are discharged into the filter chamber 19 formed by pressing several pressure plates 14 through the pump pipe 31, the feed channel 30, the connecting hole, and the liquid inlet 21. Under pressure, the filtrate in the flocculants in the filter chamber 19 is discharged back into the tank 1 through the liquid outlet channel 24 and the liquid outlet pipe 25, thereby forming a filter cake in the filter chamber 19.

[0053] 3. When the filter cake in the filter chamber 19 is full, the drive shaft 27 can be reversed, causing the pressure plates 14 to separate from each other, so that the filter cake will fall and be discharged along the discharge channel 12. At the same time, the pumping mechanism 26 stops pumping;

[0054] 4. Drive the drive shaft 27 to rotate forward, so that several pressure plates 14 press against each other again, and then the pumping mechanism 26 continues to pump to achieve the extrusion and dewatering of the flocs.

[0055] See Figure 6 , Figure 7 In some embodiments, the drive mechanism 15 may further include a first bevel gear 33 and a second bevel gear 34 slidably connected to the drive shaft 27 via a key, wherein the first bevel gear 33 and the second bevel gear 34 are arranged facing each other, and both are connected to an elastic element. For example, the elastic element may be a spring, which holds the corresponding bevel gear in its initial position by the spring force.

[0056] The filter screen 4 is also rotatably equipped with a drive shaft 35. For example, the drive shaft 35 is poweredly connected to the stirring shaft 2 via a gear or other transmission mechanism, which allows the rotation of the stirring shaft 2 to synchronously drive the drive shaft 35 to rotate. The drive shaft 35 is also equipped with a third bevel gear 36, for example, located between the first bevel gear 33 and the second bevel gear 34. Furthermore, the filter screen 4 is also equipped with a fork mechanism that is axially movable along the drive shaft 27. For example, the fork mechanism 37 may include a frame 51 and two actuating arms 52 mounted on the frame 51, with the first bevel gear 33 and the second bevel gear 34 respectively adapted to the two actuating arms.

[0057] For example, in step 2 above, the shift fork mechanism 37 is transferred to engage the first bevel gear 33 with the third bevel gear 36, thereby enabling the power of the transmission shaft 35 to be transmitted to the drive shaft 27, causing the drive shaft 27 to have a tendency to rotate forward. When the pressure plates 14 move to their limit positions and press against each other, the first bevel gear 33 will be overloaded, which will cause the elastic element connecting the first bevel gear 33 to be compressed, allowing the transmission shaft 35 and the stirring shaft 2 to rotate normally.

[0058] In particular, during this process, if the volume of the filter cake in the filter chamber 19 increases and the pressure plates 14 tend to separate from each other, this separation tendency will be immediately restricted under the drive of the first bevel gear 33. That is, the pressure plates 14 always tend to keep pressing against each other, so that the filter cake in the filter chamber 19 can be squeezed to the maximum extent and achieve a better dehydration effect.

[0059] In step 3 above, the fork mechanism 37 is transferred to engage the second bevel gear 34 and the third bevel gear 36, thereby enabling the power of the transmission shaft 35 to drive the drive shaft 27 to reverse. At this time, after the pressure plates 14 have moved to their limit positions and completely separated from each other, the second bevel gear 34 will also be overloaded, just as described above, so that the transmission shaft 35 and the stirring shaft 2 can rotate normally.

[0060] For example, the transfer of load by the shift fork mechanism can be achieved by ejecting the load using a pneumatic or electric cylinder.

[0061] In some embodiments, the pumping mechanism 26 may further include a drive disk 38 disposed on the drive shaft 35, and the bottom of the drive disk 38 is provided with a plurality of drive protrusions 39 circumferentially. For example, an elastic element is also connected to the aforementioned pumping plate 32. Similarly, the elastic element can drive the pumping plate 32 to maintain its initial position after being dislodged from the storage chamber 16. Thus, as the stirring shaft 2 drives the drive shaft 35 to rotate, the drive disk 38 will rotate synchronously with the drive shaft 35, which allows the plurality of drive protrusions 39 to continuously push the pumping plate 32 outward, thereby realizing the pumping of flocculants in the storage chamber 16.

[0062] For example, an ejectable electric gate valve (not shown) can be installed on the filter screen 4 to cut off the flow of flocculants into the storage chamber 16. Thus, when the aforementioned pressure plates 14 separate from each other, the pump plate 32, driven by the drive disc 38, will not continue to pump flocculants into the drive shaft 27, thereby reducing the likelihood of un-squeezed and dehydrated flocculants being discharged into the dewatering chamber 17.

[0063] In a preferred embodiment, the pump plate 32 is adapted to include a main body 40 and a drive block 41 that is laterally slidably adapted to the top of the main body 40, and elastic elements are connected to both the main body 40 and the drive block 41. The elastic element connected to the main body 40 is adapted to drive the pump plate 32 to a vertical reset, while the elastic element connected to the drive block 41 is used to maintain the initial lateral position of the drive block 41.

[0064] In addition, an elastic element is also connected to the frame 51 of the aforementioned fork mechanism 37. For example, the elastic element can maintain the initial position of the fork mechanism 37, especially maintaining the engagement state of the first bevel gear 33 and the third bevel gear 36.

[0065] Crucially, the inlet pipe 22 disclosed herein is adapted to be connected to a drive pipe 42, and the drive pipe 42 is connected to a first ejector 43 corresponding to the drive block 41 and a second ejector 44 corresponding to the frame 51 of the fork mechanism 37. In step 2 above, if the filter cake volume in the filter chamber 19 reaches the expected value, the pump plate 32 may have difficulty pumping the flocculants in the storage chamber 16 into the filter chamber 19 smoothly. This will cause the pressure in the inlet pipe 22 to exceed the threshold, and then the pressure will be transmitted to the drive pipe 42, causing the first ejector 43 and the second ejector 44 connected to the drive pipe 42 to be ejected.

[0066] When the first ejector 43 ejects, its ejector shaft can push the drive block 41 to disengage from the drive protrusion 39 laterally. At this time, the rotation of the drive disk 38 will not easily drive the pump plate 32 to eject. When the second ejector 44 ejects, its ejector shaft can push the fork mechanism 37 to transfer the load, especially driving the first bevel gear 33 to separate from the third bevel gear 36. The second bevel gear 34 and the third bevel gear 36 enter the meshing state. At this time, the drive shaft 27 reverses, and the pressure plates 14 separate from each other, realizing the automatic unloading of the filter cake in the filter chamber 19.

[0067] Subsequently, the pressure on the inlet pipe 22 will decrease as the connecting hole opens. Under the action of the corresponding elastic element, the fork mechanism 37 and the drive block 41 will return to their initial positions. At this time, the drive block 41 and the drive protrusion 39 will be opposite each other again, the first bevel gear 33 will re-mesh with the third bevel gear 36, and finally the pressure plates 14 will press against each other again to carry out the next round of dehydration.

[0068] In some cases, a responsive shaft 53 may be springily installed at the connection between the drive line 42 and the inlet line 22. When the pressure in the inlet line 22 exceeds a threshold, the responsive shaft 53 will retract into the drive line 42 under pressure, thereby pushing the gas in the drive line 42 to eject the two ejector components. For example, a spring with a damping structure may be connected to the responsive shaft 53, so that after the positive pressure in the inlet line 22 decreases, the drive block 41 and the fork mechanism 37 can still remain in the ejector position for a certain period of time, thus providing time for the filter cake to detach from the adjacent pressure plates 14.

[0069] In some embodiments, a transfer frame 45 is slidably fitted above the filter 4 laterally, and a mounting frame 46 is vertically and springily provided on the transfer frame 45. For example, a striking rod 47 is provided at the bottom of the mounting frame 46. Similarly, elastic elements are also connected to the transfer frame 45 and the mounting frame 46. The ejection shaft of the first ejector 43 is specifically adapted to include a first driving end 48 and a second driving end 49. For example, when the ejection shaft of the first ejector 43 ejects, the first driving end 48 will correspondingly push the driving block 41 to misalign with the driving protrusion 39; while the second driving end 49 will push the transfer frame 45 to transfer, so that the mounting frame 46 is opposite to the driving protrusion 39. Therefore, the rotation of the drive disc 38 will cause several drive protrusions 39 to continuously push the mounting bracket 46 out, that is, the striking rod 47 will also be pushed out and strike the bottom pressure plate 14, which makes the filter cake adhering to the pressure plate 14 easier to fall down and be discharged under the action of vibration.

[0070] like Figure 6 , Figure 8 As shown, when the ejector shaft of the first ejector 43 ejects, the first drive end 48 ejects to the left and pushes the drive block 41 to move, while the second drive end 49 also ejects to the left and uses its hook-like structure at the end to pull the transfer frame 45 to the left for transfer. The specific structures of the first ejector 43 and the second ejector 44 can be found in existing cylinder or hydraulic cylinder structures. The specific ejection direction of the ejector shaft and its cooperation with the transfer frame 45 or frame 51 can be adjusted according to the actual assembly. Similarly, the direction in which the first bevel gear 33 and the second bevel gear 34 drive the drive shaft 27 to rotate, and the opening direction of the spiral groove 28, can be selected according to the actual rotation direction of the stirring shaft 2. The specific selection of components is something that those skilled in the art should know and understand, so it will not be elaborated further.

[0071] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A sludge concentration treatment device comprising a tank body (1) in which a stirring shaft (2) is rotatably fitted, a stirring blade (3) being provided on the side wall of the stirring shaft (2), characterized in that: A filter screen (4) is arranged above the stirring blade (3) in the tank body (1); A lifting pump (5) is arranged on the tank body (1), and the lifting pump (5) is adapted to lift the flocculation body at the bottom of the tank body (1) and pour it into the top of the tank body (1); The filter screen (4) comprises a filtering part (6) and a bearing part (7), the filtering part (6) is adapted to be arranged obliquely to one side of the bearing part (7) to guide the flocculation body to the bearing part (7); The bearing part (7) is provided with a dewatering mechanism (8), and a drainage port (9) is arranged on the side wall of the bearing part (7); The dewatering mechanism (8) is adapted to extrude the flocculation body in the bearing part (7), and the filtrate is re-discharged into the bottom of the tank body (1) through the drainage port (9); The bearing part (7) comprises a bearing groove (13), the dewatering mechanism (8) comprises a plurality of pressing plates (14) arranged side by side in the bearing groove (13), and a driving mechanism (15) is further arranged in the bearing groove (13), the driving mechanism (15) is adapted to press or separate the plurality of pressing plates (14) from each other; The bearing groove (13) comprises a storage cavity (16) and a dewatering cavity (17) arranged in sequence along the oblique direction of the filter screen (4), and the plurality of pressing plates (14) are arranged in the dewatering cavity (17); A filter groove (18) is formed on the side wall of the pressing plate (14), adjacent filter grooves (18) are combined to form a filtering cavity (19), and a filter cloth (20) covers the filter groove (18); The pressing plate (14) is provided with a liquid inlet hole (21) connected to the filter groove (18), and a liquid inlet pipeline (22) is connected between the storage cavity (16) and the liquid inlet hole (21); The bottom of the pressing plate (14) is provided with a liquid outlet hole (23) connected to the filter groove (18), and a plurality of liquid outlet holes (23) are combined to form a liquid outlet channel (24); The pressing plate (14) at the end is provided with a liquid outlet pipe (25) connected to the liquid outlet channel (24), and the liquid outlet pipe (25) penetrates the side wall of the bearing groove (13); The storage cavity (16) is provided with a pumping mechanism (26), and the pumping mechanism (26) is adapted to pump the flocculation body in the storage cavity (16) into the liquid inlet pipeline (22).

2. The sludge concentration treatment apparatus according to claim 1, characterized by: The driving mechanism (15) comprises a driving shaft (27) rotatably arranged in the dewatering cavity (17), a plurality of spiral grooves (28) are formed in the side wall of the driving shaft (27), the pressing plate (14) is slidingly fitted in the dewatering cavity (17), and a connecting shaft (29) is arranged on the pressing plate (14), and the connecting shaft (29) is adapted to the corresponding spiral groove (28); One end of the liquid inlet hole (21) is connected to the end face of the connecting shaft (29), and the other end of the liquid inlet hole (21) is connected to the filter groove (18); The liquid inlet pipeline (22) comprises a feed flow channel (30) configured in the driving shaft (27), and an end of the driving shaft (27) is coaxially provided with a pump liquid pipe (31) communicated with the feed flow channel (30) and the storage cavity (16); The groove surface of the spiral groove (28) is provided with a communication hole communicated with the feed flow channel (30), and the communication hole is communicated with the liquid inlet hole (21) when the plurality of pressing plates (14) are pressed against each other.

3. The sludge concentration treatment apparatus according to claim 2, characterized by: The pump mechanism (26) comprises a pump plate (32) vertically and ejectably arranged above the storage cavity (16).

4. The sludge concentration treatment apparatus according to claim 3, characterized by: The driving mechanism (15) further comprises a first bevel gear (33) and a second bevel gear (34) sleeved on the driving shaft (27) through a key, the first bevel gear (33) and the second bevel gear (34) are oppositely arranged, and the first bevel gear (33) and the second bevel gear (34) are both connected with elastic members; The filter screen (4) is further provided with a transmission shaft (35) rotatably arranged thereon, the transmission shaft (35) is power-connected with the stirring shaft (2), and the transmission shaft (35) is provided with a third bevel gear (36), the third bevel gear (36) can be engaged with the first bevel gear (33) or the second bevel gear (34); The filter screen (4) is further provided with a pull fork mechanism (37), the pull fork mechanism (37) is adapted to push the first bevel gear (33) and the second bevel gear (34) and change the engagement state of the first bevel gear (33), the second bevel gear (34) and the third bevel gear (36).

5. The sludge concentration treatment apparatus according to claim 4, characterized by: The pump mechanism (26) further comprises a driving disc (38) arranged on the transmission shaft (35), and the bottom of the driving disc (38) is circumferentially provided with a plurality of driving protrusions (39); The pump plate (32) is connected with elastic members, and when the driving disc (38) rotates, the driving protrusions (39) can push the pump plate (32) to be ejected.

6. The sludge concentration treatment apparatus according to claim 5, characterized by: The pump plate (32) comprises a main body (40) and a driving block (41) slidably arranged on the top of the main body (40) in the transverse direction, and the main body (40) and the driving block (41) are both connected with elastic members; The frame body (51) of the pull fork mechanism (37) is also connected with elastic members; The liquid inlet pipeline (22) is communicated with a driving pipeline (42), and the driving pipeline (42) is connected with a first ejection member (43) and a second ejection member (44); The first ejection member (43) is opposite to the driving block (41), and the second ejection member (44) is opposite to the frame body (51) of the pull fork mechanism (37); When the pressure in the liquid inlet pipeline (22) exceeds a threshold value, the driving pipeline (42) is pressed and drives the first ejection member (43) and the second ejection member (44) to be ejected.

7. The sludge concentration apparatus according to claim 6, characterized by: The filter screen (4) is slidably fitted with a moving carrier (45) above in the transverse direction, an installation frame (46) is elastically arranged on the moving carrier (45) in the vertical direction, the bottom of the installation frame (46) is provided with a knocking rod (47), and elastic members are connected to the moving carrier (45) and the installation frame (46); When the installation frame (46) is ejected in the vertical direction, the knocking rod (47) can knock the pressing plate (14); The ejection shaft of the second ejecting member (44) comprises opposite first and second driving ends (48, 49), when the second ejecting member (44) is ejected, the first driving end (48) can push the driving block (41) to be dislocated from the driving protrusion (39), and the second driving end (49) can push the moving carrier (45) to move, and make the installation frame (46) opposite to the driving protrusion (39).

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