A centralized multi-stage treatment equipment for rural domestic sewage

Abstract

The present invention relates to the technical field of sewage treatment equipment, and discloses a centralized rural domestic sewage multi-stage treatment equipment, comprising a treatment box, an aeration tank arranged inside the treatment box, a membrane biological reaction tank arranged inside the treatment box, and a control room arranged inside the treatment box, a sedimentation tank for adding flocculants and precipitants is arranged inside the treatment box, a collecting tank for collecting sediments is arranged on the side of the sedimentation tank away from the aeration tank, a pushing component for moving sediments is arranged inside the sedimentation tank, and a dehydration component for concentrating sediments is arranged inside the collecting tank. The centralized rural domestic sewage multi-stage treatment equipment realizes efficient flocculation precipitation, concentration dehydration and effective collection of impurities in rural domestic sewage, thereby improving the sewage treatment effect and treating pollutants unique to rural domestic sewage, such as pesticide and fertilizer residues.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to a centralized rural domestic sewage multi-stage treatment equipment. Background Art

[0002] Rural domestic sewage mainly comes from washing, bathing, kitchen waste water and toilet drainage in daily family life. These sewage contain a large amount of organic matter, suspended solids, nitrogen and phosphorus compounds and pathogenic microorganisms. Secondly, there are unique pollutants in rural domestic sewage, such as pesticides and fertilizer residues. If they are discharged directly without treatment, they will cause serious pollution to the local water environment, and then affect the quality of life and health of residents. At this time, it is necessary to use multi-stage domestic sewage treatment equipment, add flocculants and precipitants to the sewage, and remove heavy metals, phosphates and other pollutants in the sewage through flocculation and sedimentation.

[0003] A sewage treatment device is disclosed in a patent with patent announcement number CN220165879U, which includes a sewage treatment tank, an inlet pipe, a first baffle, a second baffle, a third baffle, a first pumping assembly, a second pumping assembly, a third pumping assembly, a first horizontal stirring assembly, a second horizontal stirring assembly, a first vertical stirring assembly, a second vertical stirring assembly and a plurality of drainage pipes. The inlet pipe is installed on one side of the sewage treatment tank, the first baffle is installed in the sewage treatment tank, the second baffle is installed on one side of the first baffle, the third baffle is installed on the side of the second baffle away from the first baffle, and the first pumping assembly is installed on the first baffle. The sewage treatment device realizes a graded stirring action of the sewage through the mutual cooperation of various structures, so that the external sewage treatment agent can be fully mixed with the sewage, thereby indirectly improving the sewage treatment and purification efficiency of the sewage treatment equipment.

[0004] The prior art has the following defects:

[0005] Although the above patent is provided with a multi-stage stirring structure, which can fully mix the reagent with the sewage to ensure the full formation of flocculent precipitate, it is difficult to discharge the flocculent precipitate from the bottom of the box after the reagent and the sewage are fully mixed, and it is also impossible to concentrate and dehydrate the precipitate, which is not conducive to the recovery of the precipitate. Summary of the invention

[0006] In view of the problems in the prior art that after the reagent and sewage are fully mixed, it is difficult to discharge the flocculent precipitate from the bottom of the box, and the precipitate cannot be concentrated and dehydrated, which is not conducive to the recovery of the precipitate, a centralized rural domestic sewage multi-stage treatment equipment is proposed.

[0007] The present application provides a centralized rural domestic sewage multi-stage treatment equipment, the purpose of which is to achieve efficient flocculation sedimentation, concentration dehydration and effective collection of impurities in rural domestic sewage, thereby improving the sewage treatment effect and treating pollutants unique to rural domestic sewage, such as pesticide and fertilizer residues.

[0008] The technical solution of the present invention is: a centralized rural domestic sewage multi-stage treatment equipment, including a treatment box, an aeration tank arranged inside the treatment box, a membrane biological reaction tank arranged inside the treatment box, and a control room arranged inside the treatment box, a sedimentation tank for adding flocculants and precipitants is arranged inside the treatment box, a collecting tank for collecting sediments is arranged on the side of the sedimentation tank away from the aeration tank, and a pushing component for moving sediments is arranged inside the sedimentation tank; the pushing component includes a first gate arranged between the sedimentation tank and the collecting tank, a fixing plate arranged on the inner wall of the sedimentation tank and the collecting tank, a sealing partition arranged on the outer wall of the fixing plate, a second gate arranged inside the collecting tank, and a sealing partition arranged inside the sedimentation tank. The invention relates to a first push frame of the part, a second push frame elastically installed on a side of the first push frame close to the collecting tank, a filter cloth arranged on the inner wall of the second push frame, a positioning rod arranged on a side of the first push frame close to the second push frame, and a return spring sleeved on the rod wall of the positioning rod, and the top surface of the first gate is slidably fitted with the bottom surface of the sealing partition, the switch of the first gate controls the connection between the sedimentation tank and the collecting tank, the side wall of the sealing partition is slidably fitted with the outer wall of the fixed plate, the positioning rod runs through the outer wall of the second push frame, one end of the return spring is fixedly connected to the outer wall of the second push frame, and the other end of the return spring is fixedly connected to the outer wall of the first push frame; a dehydration component for concentrating the sediment is arranged inside the collecting tank.

[0009] Furthermore, the pushing component also includes a pushing plate arranged on a side of the first pushing frame away from the second pushing frame, a through groove opened on the inner wall of the sedimentation tank for the pushing plate to slide, a first push rod arranged on the outer wall of the pushing plate, and a first telescopic cylinder arranged on the inner wall of the aeration tank, and the end of the first push rod away from the pushing plate is fixedly connected to the movable end of the first telescopic cylinder.

[0010] Furthermore, the pushing component also includes a mounting frame arranged on the inner wall of the aeration tank, a second telescopic cylinder arranged on the outer wall of the mounting frame, and a second push rod arranged on the top surface of the sealing partition, and the end of the second push rod away from the sealing partition is fixedly connected to the movable end of the second telescopic cylinder.

[0011] Furthermore, the dehydration component includes a groove opened on the inner wall of the collecting tank, a filter plate arranged inside the groove, and an extrusion plate arranged on the top of the collecting tank.

[0012] Furthermore, the dehydration component also includes a collecting frame arranged on the inner wall of the collecting pool, and the collecting frame is located on the top of the sealing partition, and the bottom surface of the collecting frame is slidably fitted with the outer wall of the sealing partition.

[0013] Furthermore, the dehydration component also includes a first receiving groove opened on the inner wall of the collecting tank, a fixed seat arranged on the inner wall of the first receiving groove, a movable rod elastically installed on the outer wall of the fixed seat, a second receiving groove opened on the outer wall of the filter plate, a flip plate elastically installed inside the second receiving groove, and a limit plate arranged on the inner wall of the second receiving groove, and the movable rod is inclined in a direction close to the first receiving groove in an initial state.

[0014] Furthermore, the dehydration component also includes a winding roller rotatably installed on the top of the extrusion plate, a connecting rope fixedly installed on the top surface of the filter plate, and a through hole opened on the top surface of the extrusion plate for the connecting rope to pass through, and the end of the connecting rope away from the filter plate is fixedly connected to the outer wall of the winding roller.

[0015] Furthermore, a first torsion spring is fixedly connected to the outer wall of the movable rod, and one end of the first torsion spring away from the movable rod is fixedly connected to the outer wall of the fixing seat.

[0016] Furthermore, a second torsion spring is fixedly connected to the inner wall of the second containing groove, and one end of the second torsion spring away from the second containing groove is fixedly connected to the outer wall of the flip plate.

[0017] Furthermore, a rotation groove is formed at one end of the movable rod away from the fixed seat, and a movable ball is arranged inside the rotation groove.

[0018] Beneficial effects of the present invention:

[0019] 1. After the sedimentation tank is filled with sewage, the staff will add flocculants and precipitants into the sedimentation tank. After the agents react fully with the sewage, the sediment at the bottom of the sedimentation tank can be collected. First, the sealing baffle is controlled to move toward the aeration tank until the sealing baffle completely separates the sedimentation tank. Then, the first push frame is controlled to move toward the collection tank. The first push frame drives the second push frame to move. The filter cloth installed on the second push frame can filter out the sediment in the sewage at the bottom of the sealing baffle and push the sediment to the collection tank. Subsequently, the first gate and the second gate are opened successively, and the second push frame pushes the sediment to the inside of the collection tank. Finally, the first push frame is controlled to move away from the collection tank for reset, and then the second gate and the first gate are driven to be closed successively, so that the sediment in the sewage can be effectively gathered and the sediment is separated from the water, which is convenient for the staff to recover and treat the sediment later.

[0020] 2. During the pushing process, the sediment is squeezed between the first gate and the second gate, which effectively concentrates the sediment. When the first push frame stops moving, the reset spring drives the second push frame to shake slightly, which helps the sediment on the filter cloth to fall off, further improving the dehydration effect. At the same time, the filter plate and the squeezing plate are used together to squeeze out the sewage in the sediment, further realizing the dehydration and concentration of the sediment.

[0021] 3. By sliding the filter plate upward, the sediment on the filter plate can be driven to rise, and the sewage other than the sediment will flow downward through the filter plate, thereby achieving preliminary solid-liquid separation. Then, the filter plate is controlled to rise to drive the sediment to be squeezed with the extrusion plate, and then the sewage in the sediment can be squeezed out, further achieving the effect of sediment dehydration, reducing the volume of the sediment, and reducing the cost of subsequent processing and transportation.

[0022] 4. When the filter plate and the extrusion plate are squeezed and then descend, the movable rod first blocks the descent of one side of the filter plate, so that the filter plate as a whole tilts toward the direction close to the collection frame, and the sediment on the filter plate can slide down along the top surface of the filter plate to the inside of the collection frame. Then, when the filter plate as a whole tilts to a certain angle, the bottom surface of the filter plate gives a lateral pressure to the movable rod, driving the movable rod to rotate back to the inside of the first accommodating groove for storage, and then the filter plate as a whole can return to a horizontal state and descend back to the inside of the groove, thereby controlling the inclination of the filter plate and making the sediment on the filter plate slide to the inside of the collection frame, making it convenient for the staff to recycle and process the dehydrated sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation of the collection tank in the present invention;

[0025] Figure 3 It is the internal schematic diagram of the control room in the present invention;

[0026] Figure 4 This is a schematic diagram of the installation of the pushing component in the present invention;

[0027] Figure 5 A three-dimensional diagram of the first push frame in the present invention;

[0028] Figure 6 This is a schematic diagram of the installation of the dehydration component in the present invention;

[0029] Figure 7 It is a schematic diagram of the installation of the activity ball in the present invention;

[0030] Figure 8 is a three-dimensional diagram of the filter plate of the present invention;

[0031] Fig. 9 For the present invention Figure 8 The enlarged schematic diagram at A in the middle;

[0032] Fig.10 This is a working diagram of the first gate and the second gate in the present invention;

[0033] Fig.11It is the working flow chart of the dehydration component in the present invention.

[0034] In the figure:

[0035] 1. Treatment box; 2. Sedimentation tank; 3. Aeration tank; 4. Membrane biological reactor; 5. Control room; 6. Collection tank; 7. Pushing component; 8. Fixing plate; 9. Sealing partition; 10. First gate; 11. Second gate; 12. First push frame; 13. Second push frame; 14. Filter cloth; 15. Pushing plate; 16. Through slot; 17. First telescopic cylinder; 18. First push rod; 19. Mounting frame; 20. Second telescopic cylinder; 21. Second push rod; 22. Groove; 23. Filter Plate; 24, collecting frame; 25, extrusion plate; 26, through hole; 27, winding roller; 28, connecting rope; 29, first accommodating groove; 30, fixing seat; 31, movable rod; 32, first torsion spring; 33, second accommodating groove; 34, flip plate; 35, second torsion spring; 36, limit plate; 37, positioning rod; 38, reset spring; 39, dehydration component; 40, movable ball; 41, first bearing seat; 42, third telescopic cylinder; 43, second bearing seat; 44, fourth telescopic cylinder. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] Example 1, reference Figure 1-Figure 11 , which is the first embodiment of the present invention, provides a centralized rural domestic sewage multi-stage treatment equipment, including a treatment box 1, an aeration tank 3 arranged inside the treatment box 1, a membrane biological reactor 4 arranged inside the treatment box 1, and a control room 5 arranged inside the treatment box 1, a sedimentation tank 2 for adding flocculants and precipitants is arranged inside the treatment box 1, a collection tank 6 for collecting sediments is arranged on the side of the sedimentation tank 2 away from the aeration tank 3, and a pushing component 7 for moving sediments is arranged inside the sedimentation tank 2.

[0038] Specifically, the sedimentation tank 2 is used to add flocculants and precipitants to form flocs from the impurities in the sewage, ensuring that the flocs are fully formed, thereby increasing the effect of subsequent sedimentation. The collection tank 6 can squeeze the flocculent sediment to assist in the concentration and dehydration process of the sediment, which not only reduces the volume of the sediment, but also reduces the cost of subsequent treatment and transportation. The main function of the aeration tank 3 is to promote the growth of microorganisms and the degradation of organic matter by injecting bubbles or oxygen into the sewage. The main function of the membrane bioreactor 4 is to perform solid-liquid separation and microbial interception through membrane technology (such as membrane filters in membrane bioreactors), while providing higher treatment efficiency and water purification capacity. force, the control room 5 is equipped with an automatic controller and monitoring instruments for real-time monitoring and adjustment of key parameters in the sewage treatment process to ensure stable operation of the equipment and up-to-standard treatment effects. The control room 5 is also equipped with necessary equipment such as pump stations, electrical equipment, air compressors, bubble heads, safety equipment, ventilation equipment, etc. Among them, the aeration tank 3, membrane biological reactor 4 and control room 5 are mature existing technologies for sewage purification. The water inlet, water diversion and drainage structures between the sedimentation tank 2, the aeration tank 3, the membrane biological reactor 4 and the collection tank 6 are common water pumps, water inlet pipes and drainage pipes in the prior art (not shown in the figure), and no further elaboration is made here.

[0039] Reference Figure 4-Figure 5 The pushing component 7 includes a first gate 10 slidably installed between the sedimentation tank 2 and the collection tank 6, a fixed plate 8 fixedly installed on the inner walls of the sedimentation tank 2 and the collection tank 6, a sealing partition 9 slidably installed on the outer wall of the fixed plate 8, a second gate 11 slidably installed inside the collection tank 6, a first pushing frame 12 slidably installed inside the sedimentation tank 2, a second pushing frame 13 elastically installed on a side of the first pushing frame 12 close to the collection tank 6, a filter cloth 14 fixedly installed on the inner wall of the second pushing frame 13, and a positioning rod fixedly installed on a side of the first pushing frame 12 close to the second pushing frame 13 37, and a reset spring 38 sleeved on the rod wall of the positioning rod 37, and the top surface of the first gate 10 is slidably fitted with the bottom surface of the sealing partition 9, the switch of the first gate 10 controls the connection between the sedimentation tank 2 and the collection tank 6, the side wall of the sealing partition 9 is slidably fitted with the outer wall of the fixed plate 8, the positioning rod 37 passes through the outer wall of the second push frame 13, one end of the reset spring 38 is fixedly connected to the outer wall of the second push frame 13, and the other end of the reset spring 38 is fixedly connected to the outer wall of the first push frame 12; a dehydration component 39 for concentrating the sediment is provided inside the collection tank 6.

[0040] Specifically, by setting the fixed plate 8, an installation space can be provided for the sealing partition 9. By sliding the sealing partition 9, the sediment at the bottom of the sedimentation tank 2 can be separated from the clean water in the upper and middle part of the sedimentation tank 2, which is convenient for the first push frame 12, the second push frame 13 and the filter cloth 14 to push the sediment. The bottom surface of the sealing partition 9 slides and fits with the top surfaces of the first gate 10 and the second gate 11. Through the cooperation between the positioning rod 37 and the reset spring 38, when the first push frame 12 stops moving, the second push frame 13 can be driven to shake slightly, which is beneficial to help the sediment on the auxiliary filter cloth 14 fall off.

[0041] Reference Figure 4 The pushing component 7 also includes a pushing plate 15 fixedly mounted on a side of the first pushing frame 12 away from the second pushing frame 13, a through groove 16 opened on the inner wall of the sedimentation tank 2 for the pushing plate 15 to slide, a first push rod 18 fixedly mounted on the outer wall of the pushing plate 15, and a first telescopic cylinder 17 fixedly mounted on the inner wall of the aeration tank 3, and one end of the first push rod 18 away from the pushing plate 15 is fixedly connected to the movable end of the first telescopic cylinder 17.

[0042] Specifically, through the cooperation between the push plate 15, the through groove 16, the first push rod 18, and the second telescopic cylinder 20, power can be provided for the movement of the first push frame 12. The outer wall of the push plate 15 slides and fits with the inner wall of the through groove 16 to ensure the independence of the water quality inside the sedimentation tank 2 and the aeration tank 3.

[0043] Reference Figure 2 The pushing component 7 also includes a first sliding groove opened on the outer wall of the processing box 1 for the second gate 11 to slide, a first bearing seat 41 fixedly installed on the outer wall of the processing box 1, a third telescopic cylinder 42 fixedly installed on the outer wall of the first bearing seat 41, a second sliding groove opened on the outer wall of the processing box 1 for the first gate 10 to slide, a second bearing seat 43 fixedly installed on the outer wall of the processing box 1, and a fourth telescopic cylinder 44 fixedly installed on the outer wall of the second bearing seat 43, and the movable end of the third telescopic cylinder 42 is fixedly connected to the side wall of the second gate 11, the outer wall of the second gate 11 is slidably fitted with the inner wall of the first sliding groove, the movable end of the fourth telescopic cylinder 44 is fixedly connected to the side wall of the first gate 10, and the outer wall of the first gate 10 is slidably fitted with the inner wall of the second sliding groove.

[0044] Specifically, the first supporting seat 41 provides an installation space for the third telescopic cylinder 42, and the third telescopic cylinder 42 provides a moving power for the second gate 11. By controlling the active end of the third telescopic cylinder 42 to retract or extend, the second gate 11 can be driven to open or close. The second supporting seat 43 provides an installation space for the fourth telescopic cylinder 44, and the fourth telescopic cylinder 44 provides a moving power for the first gate 10. By controlling the active end of the fourth telescopic cylinder 44 to retract or extend, the first gate 10 can be driven to open or close. The outer wall of the second gate 11 slides and fits with the inner wall of the first sliding groove, and the outer wall of the first gate 10 slides and fits with the inner wall of the second sliding groove, thereby ensuring the overall sealing of the processing box 1.

[0045] Reference Figure 4 The pushing component 7 also includes a mounting frame 19 clamped on the inner wall of the aeration tank 3, a second telescopic cylinder 20 fixedly mounted on the outer wall of the mounting frame 19, and a second push rod 21 fixedly mounted on the top surface of the sealing partition 9, and the end of the second push rod 21 away from the sealing partition 9 is fixedly connected to the movable end of the second telescopic cylinder 20.

[0046] Specifically, the mounting frame 19 provides an installation space for the second telescopic cylinder 20, and the second telescopic cylinder 20 provides power for the sealing partition 9 to move. The second telescopic cylinder 20, the third telescopic cylinder 42, the fourth telescopic cylinder 44, and the first telescopic cylinder 17 can be electric telescopic rods or hydraulic telescopic rods commonly used in the prior art, and the second telescopic cylinder 20, the third telescopic cylinder 42, the fourth telescopic cylinder 44, and the first telescopic cylinder 17 can be controlled by an automated controller to improve the convenience of using the device. The control program is a mature prior art and will not be elaborated on here.

[0047] Example 2, reference Figure 1-Figure 11 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the dehydration component 39 includes a groove 22 opened on the inner wall of the collection tank 6, a filter plate 23 slidably installed inside the groove 22, and an extrusion plate 25 fixedly installed on the top of the collection tank 6.

[0048] Specifically, by sliding the filter plate 23 upward, the sediment on the filter plate 23 can be driven to rise, and the sewage other than the sediment will flow downward through the filter plate 23, thereby achieving preliminary solid-liquid separation. Then, the filter plate 23 is controlled to rise to drive the sediment and the extrusion plate 25 to be squeezed, and then the sewage in the sediment can be squeezed out, further achieving the effect of dehydrating the sediment, reducing the volume of the sediment, and reducing the cost of subsequent processing and transportation.

[0049] Reference Figure 1-Figure 3 A feeding trough is provided on the top surface of the extrusion plate 25, and a feeding cover is connected to the inside of the feeding trough through internal and external threads.

[0050] Specifically, after the first pushing frame 12 pushes the sediment to the top of the filter plate 23, the staff can open the feeding cover and add flocculants and precipitants to the inside of the collection tank 6 again, which can assist in concentrating the sediment and reduce the volume of the sediment.

[0051] Reference Figure 6 The dehydration component 39 also includes a collection frame 24 fixedly mounted on the inner wall of the collection pool 6 , and the collection frame 24 is located on the top of the sealing partition 9 , and the bottom surface of the collection frame 24 is slidably fitted with the outer wall of the sealing partition 9 .

[0052] Specifically, the collecting frame 24 is used to temporarily place the sediment to facilitate the subsequent processing and transportation of the sediment by the staff.

[0053] Reference Figure 6-Figure 11 The dehydration component 39 also includes a first receiving groove 29 opened on the inner wall of the collecting tank 6, a fixing seat 30 fixedly installed on the inner wall of the first receiving groove 29, a movable rod 31 elastically installed on the outer wall of the fixing seat 30, a second receiving groove 33 opened on the outer wall of the filter plate 23, a flip plate 34 elastically installed inside the second receiving groove 33, and a limiting plate 36 fixedly installed on the inner wall of the second receiving groove 33, and the movable rod 31 is inclined in the direction close to the first receiving groove 29 in the initial state.

[0054] Specifically, when the filter plate 23 and the extrusion plate 25 are squeezed and then descend, the movable rod 31 first blocks the descent of one side of the filter plate 23, so that the filter plate 23 as a whole is tilted toward the direction close to the collecting frame 24, and the sediment on the filter plate 23 can slide down along the top surface of the filter plate 23 to the inside of the collecting frame 24. Then, when the filter plate 23 as a whole is tilted to a certain angle, the bottom surface of the filter plate 23 gives a lateral pressure to the movable rod 31, driving the movable rod 31 to rotate back to the inside of the first accommodating groove 29 for storage, and then the filter plate 23 as a whole can return to a horizontal state and descend back to the inside of the groove 22.

[0055] Reference Figure 6 The dehydration component 39 also includes a winding roller 27 rotatably mounted on the top of the extrusion plate 25, a connecting rope 28 fixedly mounted on the top surface of the filter plate 23, and a through hole 26 opened on the top surface of the extrusion plate 25 for the connecting rope 28 to pass through, and one end of the connecting rope 28 away from the filter plate 23 is fixedly connected to the outer wall of the winding roller 27.

[0056] Specifically, a bracket is fixedly installed on the top surface of the processing box 1, and the winding roller 27 is rotatably installed on the inner wall of the bracket. A driving motor is fixedly installed on the side of the bracket away from the winding roller 27. The output shaft of the driving motor is fixedly connected to the axial end of the winding roller 27. By controlling the forward and reverse rotation of the output shaft of the driving motor, the winding roller 27 can be driven to rotate in the forward and reverse directions, and then the connecting rope 28 can pull the filter plate 23 to rise or fall. A plurality of winding rollers 27 are provided, and a plurality of driving motors and brackets are synchronously provided, and the output shafts of the plurality of driving motors have the same rotation speed.

[0057] Reference Figure 7 A first torsion spring 32 is fixedly connected to the outer wall of the movable rod 31 , and one end of the first torsion spring 32 away from the movable rod 31 is fixedly connected to the outer wall of the fixing seat 30 .

[0058] Specifically, when the filter plate 23 is tilted as a whole to a certain angle, the bottom surface of the filter plate 23 applies a lateral pressure to the movable rod 31, and the filter plate 23 can push the movable rod 31 to rotate to the inside of the first accommodating groove 29. At this time, the first torsion spring 32 is wound up to generate elastic force. When the filter plate 23 is separated from the movable rod 31, the movable rod 31 can be reset to the initial state through the set first torsion spring 32.

[0059] Reference Fig. 9 A second torsion spring 35 is fixedly connected to the inner wall of the second accommodating groove 33 , and one end of the second torsion spring 35 away from the second accommodating groove 33 is fixedly connected to the outer wall of the flip plate 34 .

[0060] Specifically, when the filter plate 23 rises, the movable rod 31 can drive the flip plate 34 to rotate downward. At this time, the second torsion spring 35 is rolled up to generate elastic force. When the movable rod 31 is separated from the flip plate 34, the second torsion spring 35 is set to drive the flip plate 34 to reset. The limit plate 36 is used to limit the flipping direction of the flip plate 34, so that when the filter plate 23 descends, the flip plate 34 cannot flip upward.

[0061] Reference Figure 7 A rotating groove is formed at one end of the movable rod 31 away from the fixed seat 30, and a movable ball 40 is rotatably mounted inside the rotating groove.

[0062] Specifically, through the cooperation between the movable ball 40 and the rotating groove, the friction between the movable rod 31 and the bottom surface of the filter plate 23 can be effectively reduced, which is beneficial for the filter plate 23 to push the movable rod 31 to rotate to the inside of the first accommodating groove 29 when the filter plate 23 is tilted to a certain angle as a whole.

[0063] The remaining structures are the same as those of Example 1.

[0064] Based on Example 1-Example 2, the working principle of the present invention is as follows:

[0065] After the sedimentation tank 2 is filled with sewage, the staff puts flocculants and precipitants into the sedimentation tank 2. After the agents react fully with the sewage, the sediment at the bottom of the sedimentation tank 2 can be collected. First, the sealing baffle 9 is controlled to move toward the aeration tank 3 until the sealing baffle 9 completely separates the sedimentation tank 2. Then, the first push frame 12 is controlled to move toward the collection tank 6. The first push frame 12 drives the second push frame 13 to move. The filter cloth 14 installed on the second push frame 13 can filter out the sediment in the sewage at the bottom of the sealing baffle 9 and push the sediment to the collection tank 6. Then, the first gate 10 is opened, and the first push frame 12 drives the second push frame 13 to move. The frame 13 moves to the vicinity of the second gate 11, and a certain amount of squeezing is generated between the sediment and the second gate 11, which is beneficial to concentrating the sediment. Then, the second gate 11 is opened, and the first push frame 12 drives the second push frame 13 to move. The second push frame 13 pushes the sediment to the inside of the collecting tank 6, and under the action of the reset spring 38, when the first push frame 12 stops moving, it drives the second push frame 13 to shake slightly, which is beneficial to assisting the sediment on the filter cloth 14 to fall off. Finally, the first push frame 12 is controlled to move in the direction away from the collecting tank 6 for reset, and then the second gate 11 and the first gate 10 are driven to close in turn.

[0066] After the first pushing frame 12 pushes the sediment to the top of the filter plate 23, the staff can open the feeding cover and add flocculants and precipitants into the collection tank 6 again to assist in concentrating the sediment and reduce the volume of the sediment.

[0067] By sliding the filter plate 23 upward, the sediment on the filter plate 23 can be driven to rise, and the sewage other than the sediment will flow downward through the filter plate 23. During the rising process of the filter plate 23, the movable rod 31 can drive the flip plate 34 to rotate downward. At this time, the second torsion spring 35 is wound up to generate elastic force. When the movable rod 31 is separated from the flip plate 34, the second torsion spring 35 can drive the flip plate 34 to reset until the filter plate 23 rises and drives the sediment to be squeezed with the squeezing plate 25, thereby squeezing out the sewage in the sediment, thereby further achieving the effect of dehydrating the sediment.

[0068] When the filter plate 23 is squeezed by the squeezing plate 25, the filter plate 23 is controlled to descend, and the movable rod 31 first blocks the descent of one side of the filter plate 23, so that the filter plate 23 as a whole is tilted toward the direction close to the collecting frame 24, and the sediment on the filter plate 23 can slide down along the top surface of the filter plate 23 to the inside of the collecting frame 24, and then, when the filter plate 23 as a whole is tilted to a certain angle, the bottom surface of the filter plate 23 gives a lateral pressure to the movable rod 31, driving the movable rod 31 to rotate back to the internal storage of the first accommodating groove 29, and then the filter plate 23 as a whole can return to a horizontal state and descend back to the inside of the groove 22.

[0069] Finally, the staff guides the treated sewage in the sedimentation tank 2 and the collection tank 6 into the aeration tank 3 for further treatment. After being treated in the aeration tank 3, the sewage is guided into the membrane biological reactor for treatment, thereby achieving a multi-stage treatment effect.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A centralized rural domestic sewage multi-stage treatment device, comprising a treatment box (1), an aeration tank (3) arranged inside the treatment box (1), a membrane biological reactor (4) arranged inside the treatment box (1), and a control room (5) arranged inside the treatment box (1), characterized in that: The processing box (1) is provided with a sedimentation tank (2) for adding flocculants and precipitants, a collecting tank (6) for collecting sediments is provided on a side of the sedimentation tank (2) away from the aeration tank (3), and a pushing component (7) for moving sediments is provided inside the sedimentation tank (2); The pushing component (7) comprises a first gate (10) arranged between the sedimentation tank (2) and the collection tank (6), a fixing plate (8) arranged on the inner walls of the sedimentation tank (2) and the collection tank (6), a sealing partition (9) arranged on the outer wall of the fixing plate (8), a second gate (11) arranged inside the collection tank (6), a first pushing frame (12) arranged inside the sedimentation tank (2), a second pushing frame (13) elastically mounted on a side of the first pushing frame (12) close to the collection tank (6), a filter cloth (14) arranged on the inner wall of the second pushing frame (13), and a filter cloth (15) arranged on the inner wall of the first pushing frame (12) close to the second pushing frame (13). 13), a positioning rod (37) on one side thereof, and a return spring (38) sleeved on the rod wall of the positioning rod (37), and the top surface of the first gate (10) is slidably fitted with the bottom surface of the sealing partition (9), the switch of the first gate (10) controls the communication between the sedimentation tank (2) and the collection tank (6), the side wall of the sealing partition (9) is slidably fitted with the outer wall of the fixing plate (8), the positioning rod (37) passes through the outer wall of the second pushing frame (13), one end of the return spring (38) is fixedly connected to the outer wall of the second pushing frame (13), and the other end of the return spring (38) is fixedly connected to the outer wall of the first pushing frame (12); The collecting tank (6) is provided with a dehydration component (39) for concentrating the precipitate; The dehydration component (39) comprises a groove (22) formed on the inner wall of the collection tank (6), a filter plate (23) arranged inside the groove (22), and a pressing plate (25) arranged on the top of the collection tank (6); The dehydration component (39) further comprises a collection frame (24) arranged on the inner wall of the collection pool (6), and the collection frame (24) is located on the top of the sealing partition (9), and the bottom surface of the collection frame (24) is slidably fitted with the outer wall of the sealing partition (9); The dehydration component (39) further comprises a first receiving groove (29) provided on the inner wall of the collection tank (6), a fixing seat (30) provided on the inner wall of the first receiving groove (29), a movable rod (31) elastically mounted on the outer wall of the fixing seat (30), a second receiving groove (33) provided on the outer wall of the filter plate (23), a flip plate (34) elastically mounted inside the second receiving groove (33), and a limit plate (36) provided on the inner wall of the second receiving groove (33) for limiting the flipping direction of the flip plate (34), and the movable rod (31) is inclined in an initial state in a direction close to the first receiving groove (29); During the process of the filter plate (23) rising, the movable rod (31) can drive the flip plate (34) to rotate downward. During the process of the filter plate (23) descending, the movable rod (31) first blocks one side of the filter plate (23) from descending, so that the filter plate (23) as a whole is tilted in a direction close to the collection frame (24). The sediment on the filter plate (23) can slide downward along the top surface of the filter plate (23) to the inside of the collection frame (24). Subsequently, during the process of the filter plate (23) further tilting, the bottom surface of the filter plate (23) applies a lateral pressure to the movable rod (31), driving the movable rod (31) to rotate back to the inside of the first receiving groove (29) for storage. The outer wall of the movable rod (31) is fixedly connected to a first torsion spring (32), and one end of the first torsion spring (32) away from the movable rod (31) is fixedly connected to the outer wall of the fixing seat (30); A second torsion spring (35) is fixedly connected to the inner wall of the second accommodating groove (33), and one end of the second torsion spring (35) away from the second accommodating groove (33) is fixedly connected to the outer wall of the flip plate (34).

2. The centralized rural domestic sewage multi-stage treatment equipment according to claim 1 is characterized in that: The pushing component (7) further comprises a pushing plate (15) arranged on a side of the first pushing frame (12) away from the second pushing frame (13), a through groove (16) provided on the inner wall of the sedimentation tank (2) for the pushing plate (15) to slide, a first pushing rod (18) arranged on the outer wall of the pushing plate (15), and a first telescopic cylinder (17) arranged on the inner wall of the aeration tank (3), wherein one end of the first pushing rod (18) away from the pushing plate (15) is fixedly connected to the movable end of the first telescopic cylinder (17).

3. The centralized rural domestic sewage multi-stage treatment equipment according to claim 2 is characterized in that: The pushing component (7) further comprises a mounting frame (19) arranged on the inner wall of the aeration tank (3), a second telescopic cylinder (20) arranged on the outer wall of the mounting frame (19), and a second push rod (21) arranged on the top surface of the sealing baffle (9), wherein one end of the second push rod (21) away from the sealing baffle (9) is fixedly connected to the movable end of the second telescopic cylinder (20).

4. The centralized rural domestic sewage multi-stage treatment equipment according to claim 1 is characterized in that: The dehydration component (39) further comprises a winding roller (27) rotatably mounted on the top of the extrusion plate (25), a connecting rope (28) fixedly mounted on the top surface of the filter plate (23), and a through hole (26) provided on the top surface of the extrusion plate (25) for the connecting rope (28) to pass through, and one end of the connecting rope (28) away from the filter plate (23) is fixedly connected to the outer wall of the winding roller (27).

5. The centralized rural domestic sewage multi-stage treatment equipment according to claim 1 is characterized in that: A rotation groove is formed at one end of the movable rod (31) away from the fixed seat (30), and a movable ball (40) is arranged inside the rotation groove.

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