A kind of SBR sewage treatment process is with decanter filter device and filtering method

Abstract

The application discloses a kind of SBR sewage treatment process with water decanter filter device, including filter tank (1), setting on the side wall of filter tank (1) water decanter (2) and setting on the top of water decanter (2) slot (3), the slot (3) one side is equipped with buoy (4), the filter screen (6) is equipped between the slot (3) and buoy (4), the side of the filter screen (6) is equipped with cleaning assembly (7), when dirt on the filter screen (6) remains to influence water flow normal through, filter screen (6) is rotated and is rotated upwards using water pressure, and dirt on the surface of filter screen (6) is cleaned a part by cleaning assembly (7), after cleaning dirt, filter screen (6) resets under the action of gravity, can reach the purpose of automatically cleaning dirt on the surface of filter screen (6), to avoid the situation that occurs due to dirt blocking filter screen (6), causes pumping efficiency to reduce, influence normal sewage normal filtration.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sewage treatment process, and particularly relates to a water decanter filter device for SBR (Sequencing Batch Reactor) sewage treatment process. BACKGROUND

[0002] The SBR sewage treatment process is to complete the water inflow, aeration, skimming and limitation in the same biological reaction tank, and the time period is pre-set or timely adjusted according to the water quality and quantity, the concentrated sewage is in the filter tank, after aeration and precipitation, the upper clear liquid is discharged from the filter tank through the slot of the water decanter.

[0003] Since the larger insoluble pollutants in water are precipitated to the bottom in the filter tank, and part of the pollutants in the upper clear liquid still remains in the water decanter during the filtering process, the filter screen is needed to be additionally arranged on the slot of the water decanter during the water pumping process, the pollutants adhere to the filter screen during the water pumping process, the filter screen is blocked, the normal water pumping and filtering efficiency is affected, and when the pollutants are more, the slot may be blocked. SUMMARY

[0004] The present application aims to provide a water decanter filter device for SBR sewage treatment process, which can automatically clean the pollutants on the surface of the filter screen.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is: a kind of SBR sewage treatment process is filtered by water decanter filter device, including filter tank, water decanter being arranged on the side wall of filter tank and notch being arranged at the top of water decanter, the both ends of the notch are equipped with connecting plate, the both ends of the notch are equipped with connecting plate, one end of the connecting plate and the notch are movably connected, floating tube is equipped between the other end of the connecting plate, the inner side of the connecting plate is equipped with filter screen, the filter screen is located between floating tube and notch, the side of the connecting plate is equipped with cleaning assembly for cleaning the sundries on the surface of filter screen;The cleaning assembly includes mounting seat being arranged on the inner side of connecting plate, arc-shaped groove is equipped on the mounting seat, the side of filter screen is equipped with fixed rod being matched with arc-shaped groove, delay structure is equipped in the mounting seat, the position of fixed rod is controlled;The bottom of filter screen is equipped with guide plate, and the guide plate is located at one end of filter screen away from mounting seat;The delay structure includes blocking rod, one end of the blocking rod is arranged in the mounting seat, the other end of the blocking rod is located in the arc-shaped groove, one end of the blocking rod located in the mounting seat is equipped with ejector spring, and the filter screen drives the fixed rod to slide up and down along the arc-shaped groove;Vertical rod is equipped in the blocking rod, support block is equipped in the mounting seat, and the support block is equipped with slot being matched with vertical rod;The bottom of arc-shaped groove is equipped with bottom rod, one end of the bottom rod is equipped with connecting hose, one end of the connecting hose is equipped with top rod, the top rod is located at the bottom of vertical rod, and the top rod is located in the slot;Counterweight block is equipped on the vertical rod, and the diameter of vertical rod is less than the diameter of slot;The bottom of notch is equipped with rotary sealing plate, counterweight rod is rotatably connected to the bottom end of sealing plate, and the bottom end of sealing plate is attached to the upper surface of filter screen, so as to block the gap between notch and filter screen;The inner side of connecting plate is equipped with fixing ring, and the side of filter screen is equipped with positioning rod being matched with fixing ring.

[0006] The side of floating tube close to filter screen is equipped with sleeve frame, sealing arc plate is equipped in the sleeve frame, sleeve ring is equipped at the bottom of sealing arc plate, and the sleeve ring is arranged on filter screen.

[0007] A kind of water decanter filtering method is realized by using a kind of SBR sewage treatment process is filtered by water decanter filter device, and the steps are as follows:

[0008] S1: the water in filter tank passes through filter screen and enters into notch, and is discharged to the outside of filter tank from notch and water decanter, when the water passes through filter screen, the dirt in water is blocked by filter screen;

[0009] S2: as the dirt under filter screen increases, the filtering effect of filter screen decreases, and the water pressure on filter screen increases;

[0010] S3: filter screen is lifted up under the action of water pressure, and filter screen drives blocking rod to move, and blocking rod is clamped by vertical rod after moving and cannot move;

[0011] S4: The fixed rod is hit on the top of the arc-shaped groove, and the filter screen is vibrated;

[0012] S5: The vibration of the filter screen shakes off the dirt on the surface of the filter screen, and the water flow washes away the dirt shaken off under the action of the flow guide plate;

[0013] S6: After the dirt is shaken off, the fixed rod is lowered along the arc-shaped groove, and when the fixed rod is lowered to the bottom of the arc-shaped groove, the bottom rod is moved, thereby pushing the top rod to rise, thereby pushing the vertical rod into the blocking rod again, and the blocking rod is reset under the action of the ejection spring.

[0014] The technical effect of the present application is that when the dirt on the filter screen remains to affect the normal passage of the water flow, the filter screen is rotated upward by the water pressure, and the vibration caused by the impact between the filter screen and the mounting seat shakes off part of the dirt on the surface of the filter screen, and the low water pressure formed by the rapid movement of the filter screen guides the water around the filter plate to impact the bottom of the filter screen, so that the dirt shaken off is removed from below the filter screen under the action of the water flow, avoiding re-adhesion to the filter screen during the falling process of the filter screen, and after cleaning the dirt, the filter screen is reset under the action of gravity, so as to achieve the purpose of automatically cleaning the dirt on the surface of the filter screen, thereby avoiding the situation that the dirt blocks the filter screen, reduces the pumping efficiency, and affects the normal filtration of the sewage. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present specification includes the following drawings, and the contents shown are as follows:

[0016] Figure 1 It is a structural schematic view of the filter device of the water decanter for the SBR sewage treatment process.

[0017] Figure 2 It is a structural schematic view of the filter device of the water decanter for the SBR sewage treatment process. Figure 1 It is a schematic view of the filter screen of the filter device of the water decanter for the SBR sewage treatment process.

[0018] Figure 3 It is an enlarged schematic view of A of the filter device of the water decanter for the SBR sewage treatment process. Figure 2

[0019] It is a structural motion difference diagram of the filter device of the water decanter for the SBR sewage treatment process. Figure 4 Figure 3 It is an enlarged schematic view of B of the filter device of the water decanter for the SBR sewage treatment process.

[0020] Figure 5 Figure 2 It is an enlarged schematic view of B of the filter device of the water decanter for the SBR sewage treatment process. ​​

[0021] The figure is marked: 1, filter tank; 2, decanter; 3, slot; 4, float; 5, connecting plate; 6, filter screen; 7, cleaning assembly; 71, mounting seat; 72, fixed rod; 73, delay structure; 731, blocking rod; 732, ejection spring; 733, vertical rod; 734, support block; 735, slot; 736, bottom rod; 737, connecting hose; 738, ejector rod; 739, counterweight; 74, deflector; 75, arc slot; 8, frame; 9, sealing arc plate; 10, collar; 11, fixed ring; 12, positioning rod; 13, sealing plate; 14, counterweight rod. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be further described in detail below with reference to the drawings, and the purpose is to help the technical personnel in the field to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help its implementation.

[0023] Please refer to Figures 1-5 A decanter filter device for SBR sewage treatment process, comprising a filter tank 1, a decanter 2 arranged on the side wall of the filter tank 1, and a slot 3 arranged at the top of the decanter 2, both ends of the slot 3 are provided with connecting plates 5, one end of the connecting plate 5 is movably connected with the slot 3, and the other end of the connecting plate 5 is provided with a float 4, the inner side of the connecting plate 5 is provided with a filter screen 6, the filter screen 6 is located between the float 4 and the slot 3, and the side of the connecting plate 5 is provided with a cleaning assembly 7 for cleaning the sundries on the surface of the filter screen 6.

[0024] The slot 3 and the connecting plate 5 are movably connected, the slot 3, the filter screen 6, the float 4 and the connecting plate 5 form an open box, which can block the dirt in the water in the filter tank 1, avoid that the water drawn out by the decanter 2 contains a large amount of dirt, and affect the quality of the water, so that the water in the filter tank 1 passes through the filter screen 6 from the bottom of the filter screen 6, enters the slot 3, and is discharged from the filter tank 1, and the filter screen 6 can filter and block the dirt contained in the water, further improve the water quality, and reduce the content of dirt in the water discharged from the filter tank 1.

[0025] The cleaning assembly 7 comprises a mounting seat 71 arranged on the inner side of the connecting plate 5, the mounting seat 71 is provided with an arc slot 75, the side of the filter screen 6 is provided with a fixed rod 72 matched with the arc slot 75, the mounting seat 71 is provided with a delay structure 73 for controlling the position of the fixed rod 72, and the bottom of the filter screen 6 is provided with a deflector 74 located at one end of the filter screen 6 away from the mounting seat 71.

[0026] The delay structure 73 is used to control the pressure required for the filter screen 6 to rise, and due to the effect of the delay structure 73 on the filter screen 6, the filter screen 6 will only rise when subjected to a certain upward pressure, so that the filter screen 6 can drive the fixed rod 72 to rise quickly, thereby causing the fixed rod 72 to collide with the top of the arc-shaped groove 75, and the collision generates vibration to shake the dirt off the filter screen 6. During the process of the rapid rise of the filter screen 6, the water volume below the filter screen 6 is small at this time, and under the action of water pressure, the water on both sides of the filter screen 6 will quickly move to the bottom of the filter screen 6, and the dirt shaken off the filter screen 6 can be quickly washed away by cooperating with the guide plate 74, so as to avoid the situation that the dirt adheres to the filter screen 6 again during the falling process of the filter screen 6.

[0027] The delay structure 73 comprises a blocking rod 731, one end of the blocking rod 731 is arranged in the mounting seat 71, the other end of the blocking rod 731 is located in the arc-shaped groove 75, and the fixed rod 72 is located between the blocking rod 731 and the inner wall of the arc-shaped groove 75, and the one end of the blocking rod 731 located in the mounting seat 71 is provided with an ejection spring 732.

[0028] The ejection spring 732 gives the blocking rod 731 an outward thrust, and due to the inclined surface at the bottom of the blocking rod 731, when the filter screen 6 drives the fixed rod 72 to rise, the fixed rod 72 will push the blocking rod 731 to move, and the blocking rod 731 will compress the ejection spring 732, and when the fixed rod 72 completely pushes away the blocking rod 731, the filter screen 6 is no longer subjected to the pressure of the blocking rod 731, so as to realize the rapid rise and the effect of colliding with the top of the mounting seat 71.

[0029] The blocking rod 731 is provided with a vertical rod 733, the mounting seat 71 is provided with a supporting block 734, and the supporting block 734 is provided with a slot 735 matched with the vertical rod 733.

[0030] When the blocking rod 731 is pushed outwards, the vertical rod 733 is driven to move to the position of the slot 735, and is inserted into the slot 735 under the action of gravity, and at this time, the vertical rod 733 is clamped between the blocking rod 731 and the supporting block 734, and the position of the blocking rod 731 is fixed by the cooperation of the vertical rod 733 and the slot 735, so as to prevent the blocking of the falling filter screen 6 and the fixed rod 72.

[0031] The bottom of the arc-shaped groove 75 is provided with a bottom rod 736, one end of the bottom rod 736 is provided with a connecting hose 737, one end of the connecting hose 737 is provided with a top rod 738, the top rod 738 is located at the bottom of the vertical rod 733, and the top rod 738 is located in the slot 735.

[0032] When the filter screen 6 drives the fixed rod 72 to fall to the bottom of the mounting seat 71, the fixed rod 72 pushes the bottom rod 736 to descend under the action of gravity, thereby pushing the top rod 738 to ascend, pushing the vertical rod 733 out of the slot 735, the blocking rod 731 is no longer fixed, and is reset under the action of the ejection spring 732, and since the blocking rod 731 is at a certain distance from the bottom of the arc-shaped slot 75, the fixed rod 72 will not affect the ascent of the bottom rod 736 after contacting the blocking rod 731.

[0033] A counterweight 739 is arranged on the vertical rod 733, and the diameter of the vertical rod 733 is smaller than the diameter of the slot 735; by adding a counterweight 739 and simultaneously making the diameter of the slot 735 greater than the diameter of the vertical rod 733, the vertical rod 733 can stably fall into the slot 735.

[0034] The side of the float 4 close to the filter screen 6 is provided with a sleeve frame 8, the sleeve frame 8 is provided with a sealing arc plate 9, the bottom of the sealing arc plate 9 is provided with a sleeve ring 10, and the sleeve ring 10 is arranged on the filter screen 6; when the filter screen 6 rotates up and down, the sealing arc plate 9 can fill the gap between the float 4 and the filter screen 6, so as to avoid the unfiltered water from leaking into the slot 3.

[0035] The inner side of the connecting plate 5 is provided with a fixed ring 11, and the side edge of the filter screen 6 is provided with a positioning rod 12 matched with the fixed ring 11; the situation that the filter screen is stuck due to rotation of the float 4 is avoided.

[0036] The bottom of the slot 3 is provided with a rotating sealing plate 13, the bottom end of the sealing plate 13 is rotationally connected with a counterweight rod 14, and the bottom end of the sealing plate 13 is attached to the upper surface of the filter screen 6; the gap between the slot 3 and the filter screen 6 is blocked by the sealing plate 13, so as to prevent water leakage.

[0037] Working principle: when pumping water, the slot 3, the float 4 and the connecting plate 5 form a frame body, the water flow is blocked from entering the slot 3, the water in the filter tank 1 can only pass through the filter screen 6 from the bottom of the filter screen 6, enter the slot 3, and then be discharged from the slot 3 and the decanter 2 to the outside of the filter tank 1; when the water passes through the filter screen 6, the impurities in the water are blocked by the filter screen 6; as the impurities under the filter screen 6 increase, the filtering effect of the filter screen 6 decreases, and under the action of the continuous rotation and descent of the decanter 2, the water pressure on the bottom of the filter screen 6 gradually increases;

[0038] When the pressure on the filter screen 6 is large enough to overcome the force of the ejection spring 732 and push the blocking rod 731 away, the filter screen 6 drives the fixed rod 72 to push the blocking rod 731 away and ascend along the arc-shaped slot 75, and finally collide with the top of the mounting seat 71; due to the vibration caused by the collision, the impurities adhered to the bottom of the filter screen 6 are shaken down, so as to achieve the purpose of cleaning the filter screen 6;

[0039] Due to the filter screen 6 is quickly moved up, the amount of water below the filter screen 6 will be low, under the action of water pressure, the water on both sides of the filter screen 6 will quickly move to the bottom of the filter screen 6, and under the action of the flow guide plate 74, the water quickly moves along the lower surface of the filter screen 6, pushes away the dirt shaken down, avoiding re-sticking on the filter screen 6 in the process of falling back of the filter screen 6;

[0040] When the dirt on the filter screen 6 is removed, the filter screen 6 falls under the action of gravity, and falls at the bottom of the mounting seat 71, and because the vertical rod 733 is inserted into the slot 735 under the action of gravity in the process of lifting the blocking rod 731 on the top of the filter screen 6, the vertical rod 733 is clamped between the blocking rod 731 and the supporting block 734, thereby fixing the position of the blocking rod 731, and not blocking the normal falling back of the filter screen 6 and the fixed rod 72, when the fixed rod 72 falls to the bottom of the mounting seat 71, the bottom rod 736 and the connecting hose 737 are moved by using the gravity, thereby pushing the top rod 738 to rise, and the vertical rod 733 is re-topped into the blocking rod 731, the blocking rod 731 is no longer fixed in position, and is reset under the action of the ejection spring 732, achieving the purpose of automatic reset cleaning.

[0041] A water decanter filtering method, using a SBR sewage treatment process water decanter filtering device to realize, the steps are as follows:

[0042] S1: the water in the filter tank 1 passes through the filter screen 6 into the notch 3, and is discharged from the notch 3 and the water decanter 2 to the outside of the filter tank 1, when the water passes through the filter screen 6, the dirt in the water is blocked by the filter screen 6;

[0043] S2: as the dirt below the filter screen 6 increases, the filtering effect of the filter screen 6 decreases, and the water pressure on the filter screen 6 increases;

[0044] S3: the filter screen 6 is lifted up under the action of water pressure, the filter screen 6 pushes the blocking rod 731 to move, and the blocking rod 731 is clamped by the vertical rod 733 and cannot move after moving;

[0045] S4: the filter screen 6 drives the fixed rod 72 to move upwards along the arc-shaped slot 75, the fixed rod 72 hits the top of the arc-shaped slot 75, and the filter screen 6 vibrates;

[0046] S5: the vibration of the filter screen 6 shakes the dirt on the surface of the filter screen 6 down, and under the action of the flow guide plate 74, the water flow washes away the dirt shaken down;

[0047] S6: After the dirt is shaken off, the filter screen 6 drives the fixed rod 72 to descend along the arc-shaped groove 75, when the fixed rod 72 descends to the bottom of the arc-shaped groove 75, the bottom rod 736 is pushed to move, thereby pushing the top rod 738 to rise, thereby re-topping the vertical rod 733 into the blocking rod 731, and the blocking rod 731 resets under the action of the ejection spring 732.

[0048] The technical effect of the present application is that when the dirt on the filter screen 6 remains to affect the normal passage of water flow, the filter screen 6 is rotated upward by water pressure, and the dirt on the surface of the filter screen 6 is shaken off by the impact between the filter screen 6 and the mounting seat 71. The low water pressure formed by the rapid movement of the filter screen 6 cooperates with the deflector 74 to guide the water around the filter screen to impact the bottom of the filter screen 6, so that the dirt shaken off is removed from below the filter screen 6 under the action of water flow, avoiding re-adhesion to the filter screen 6 during the falling process of the filter screen 6. After cleaning the dirt, the filter screen 6 resets under the action of gravity, which can achieve the purpose of automatically cleaning the dirt on the surface of the filter screen 6, thereby avoiding the situation that the dirt blocks the filter screen 6, reduces the pumping efficiency, and affects the normal filtration of sewage.

[0049] The above describes the present application in conjunction with the drawings. Obviously, the specific implementation of the present application is not limited by the above method. As long as various non-essential improvements are made by using the method concept and technical solution of the present application; or without improvement, the above concept and technical solution of the present application are directly applied to other occasions, which are within the protection scope of the present application.

Claims

1. A filter device for a decanter of a SBR sewage treatment process, comprising a filter tank (1), a decanter (2) arranged on the side wall of the filter tank (1), and a slot (3) arranged on the top of the decanter (2), characterized in that: The both ends of the slot (3) are provided with connecting plates (5), one end of the connecting plate (5) is movably connected with the slot (3), the other end of the connecting plate (5) is provided with a buoy (4), the inner side of the connecting plate (5) is provided with a filter screen (6), the filter screen (6) is located between the buoy (4) and the slot (3), the side edge of the connecting plate (5) is provided with a cleaning assembly (7) for cleaning the sundries on the surface of the filter screen (6); the cleaning assembly (7) comprises a mounting seat (71) arranged on the inner side of the connecting plate (5), an arc-shaped groove (75) is arranged on the mounting seat (71), the side edge of the filter screen (6) is provided with a fixing rod (72) matched with the arc-shaped groove (75), the mounting seat (71) is provided with a delay structure (73) for controlling the position of the fixing rod (72), the bottom of the filter screen (6) is provided with a flow guide plate (74), and the flow guide plate (74) is located at the end of the filter screen (6) away from the mounting seat (71); the delay structure (73) comprises a blocking rod (731), one end of the blocking rod (731) is arranged in the mounting seat (71), the other end of the blocking rod (731) is located in the arc-shaped groove (75), and the end of the blocking rod (731) located in the mounting seat (71) is provided with an ejection spring (732); the blocking rod (731) is provided with a vertical rod (733), the mounting seat (71) is provided with a supporting block (734), and the supporting block (734) is provided with a slot (735) matched with the vertical rod (733); the bottom of the arc-shaped groove (75) is provided with a bottom rod (736), one end of the bottom rod (736) is provided with a connecting hose (737), one end of the connecting hose (737) is provided with a top rod (738), the top rod (738) is located at the bottom of the vertical rod (733), and the top rod (738) is located in the slot (735); the vertical rod (733) is provided with a counterweight block (739), and the diameter of the vertical rod (733) is smaller than that of the slot (735); the bottom of the slot (3) is provided with a rotating sealing plate (13), the bottom end of the sealing plate (13) is rotatably connected with a counterweight rod (14), the bottom end of the sealing plate (13) is attached to the upper surface of the filter screen (6), and the sealing plate (13) blocks the gap between the slot (3) and the filter screen (6); the inner side of the connecting plate (5) is provided with a fixing ring (11), the side edge of the filter screen (6) is provided with a positioning rod (12) matched with the fixing ring (11), and the filter screen (6) drives the fixing rod (72) to slide up and down along the arc-shaped groove (75).

2. The device according to claim 1, characterized in that: The side of the buoy (4) close to the filter screen (6) is provided with a sleeve frame (8), the sleeve frame (8) is provided with a sealing arc plate (9), the bottom of the sealing arc plate (9) is provided with a sleeve ring (10), and the sleeve ring (10) is arranged on the filter screen (6).

3. A water decanting and filtering method, which is realized by using the water decanting and filtering device for SBR sewage treatment process according to any one of claims 1-2. S1: the water in the filter tank (1) passes through the filter screen (6) into the notch (3), and is discharged from the notch (3) and the decanter (2) to the outside of the filter tank (1), and when the water passes through the filter screen (6), the dirt in the water is blocked by the filter screen (6); S2: as the dirt under the filter screen (6) increases, the filtering effect of the filter screen (6) decreases, and the water pressure on the filter screen (6) increases; S3: the filter screen (6) is pushed up by the water pressure, the filter screen (6) pushes the blocking rod (731) to move, and the blocking rod (731) is blocked by the vertical rod (733) and cannot move after moving; S4: the filter screen (6) drives the fixed rod (72) to move upward along the arc-shaped groove (75), the fixed rod (72) hits the top of the arc-shaped groove (75), and the filter screen (6) vibrates; S5: the vibration of the filter screen (6) shakes the dirt on the surface of the filter screen (6) down, and the water flow washes away the dirt shaken down under the action of the deflector (74); S6: after the dirt is shaken off, the filter screen (6) drives the fixed rod (72) to descend along the arc-shaped groove (75), and when the fixed rod (72) descends to the bottom of the arc-shaped groove (75), the bottom rod (736) is pushed to move, thereby pushing the top rod (738) to rise, thereby reinserting the vertical rod (733) into the blocking rod (731), and the blocking rod (731) is reset under the action of the ejection spring (732).

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