Anti-blocking structure of filtering type sewage treater

Abstract

The invention discloses an anti-blocking structure of a filtering type sewage treater, and belongs to the technical field of sewage filtering, the anti-blocking structure comprises a plurality of rotating disc type disturbance units arranged in a filtering tank, blades of the rotating disc type disturbance units can turn over gravel at the bottom layer, air outlet nozzles are arranged on rotating discs, and air is supplied through an air pump to form air-liquid impact to strengthen the desilting effect; the designed double-filter-cavity structure controls the on-off of each pipeline through the electromagnetic valve, supports the reverse flushing of the other cavity during single-cavity filtration, and maintains continuous operation by using the two-way water supply of a single water pump. Compared with the prior art, the sewage treatment device can be effectively cleaned, blockage is prevented, shutdown dredging is not needed, the service life of the gravel layer is remarkably prolonged, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage filtration, and in particular to an anti-clogging structure of a filtering type sewage treatment device. Background Art

[0002] With the acceleration of urbanization, the demand for sewage treatment is growing. As a filtering sewage treatment device, gravel filters are widely used in the treatment of domestic sewage and industrial wastewater. Traditional gravel filters intercept suspended matter in the water through the pores of the gravel layer, but in long-term operation, the gravel layer is easily clogged due to impurity deposition, thereby reducing the filtration efficiency. Frequent shutdowns are required for cleaning or replacement of filter materials, which has high maintenance costs and is difficult to meet continuous treatment needs.

[0003] When the existing sand and gravel filters are used to flush the sand and gravel, the flushing force of the reverse water flow is limited, and the impurities on the bottom layer are easily compacted and difficult to be completely removed. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an anti-clogging structure for a filtering sewage treatment device, which improves the dredging effect by providing a disturbance unit to mechanically stir and impact the sand and gravel on the bottom layer with air flow.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an anti-clogging structure of a filtering sewage treatment device, comprising a filter tank, a supporting layer plate is fixed in the filter tank, filter holes are opened on the supporting layer plate, the supporting layer plate divides the cavity of the filter tank into a pre-filter chamber and a post-filter chamber, and a sand and gravel layer for filtering is arranged in the pre-filter chamber;

[0006] The top and bottom of the filter tank are respectively provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with the pre-filter bin, the water outlet pipe is connected with the post-filter bin, and a sewage pipe is provided on the side wall of the pre-filter bin;

[0007] A plurality of disturbance units are arranged on the support layer plate, and the disturbance unit comprises a turntable rotatably mounted on the support layer plate, and the turntable is provided with blades and air outlet nozzles. When the turntable rotates, the blades turn over the sand and gravel in the sand and gravel layer.

[0008] Preferably, a partition connected to the supporting layer plate is provided in the pre-filter chamber, and the partition divides the pre-filter chamber into filter chamber one and filter chamber two, and both the filter chamber one and the filter chamber two are provided with a sand and gravel layer.

[0009] Preferably, a driving box is provided at the bottom of the filter tank, and a driving mechanism for driving all the turntables to rotate is provided in the driving box.

[0010] Preferably, the disturbance unit also includes a rotating shaft fixed on the turntable, the rotating shaft passes through the supporting layer plate and the bottom of the filter tank and extends into the drive box, a sealing ring is provided at the connection between the rotating shaft and the supporting layer plate and the bottom of the filter tank, and the rotating shaft is rotatably installed in the drive box.

[0011] Preferably, the driving mechanism comprises:

[0012] A plurality of one-way bearings, wherein the plurality of one-way bearings are respectively sleeved on a plurality of rotating shafts in the driving box;

[0013] A plurality of driven gears, wherein the plurality of driven gears are respectively sleeved on a plurality of one-way bearings;

[0014] A gear ring, which is rotatably mounted in the drive box and meshes with a plurality of driven gears;

[0015] The motor is fixed on the driving box, and a driving gear meshing with the gear ring is fixed on the output shaft of the motor.

[0016] Preferably, the disturbance units are divided into two groups, and the two groups of disturbance units are respectively located in filter chamber one and filter chamber two; the transmission directions of the one-way bearings sleeved on the rotating shafts in the two groups of disturbance units are opposite; when the output shaft of the motor rotates forward, it drives the disturbance unit in filter chamber one to rotate, and when it rotates reversely, it drives the disturbance unit in filter chamber two to rotate.

[0017] Preferably, the blades in the two groups of disturbance units are inclined in opposite directions; when the disturbance units rotate, the corresponding blades drive the sand and gravel to turn upward.

[0018] Preferably, an airway is opened in the rotating shaft, the airway is connected to the corresponding air outlet nozzle, and a rotating joint connected to the airway is arranged at the bottom of the rotating shaft; an air pump is arranged at the bottom of the driving box, the air pump is connected to two bronchi, and the two bronchi are respectively connected to the rotating joints corresponding to the two groups of disturbance units.

[0019] Preferably, the filter tank is provided with a water inlet branch pipe 1 and a water inlet branch pipe 2 which are connected to the filter chamber 1 and the filter chamber 2 respectively, and the water inlet branch pipe 1 and the water inlet branch pipe 2 are connected to the water inlet pipe through a tee pipe; the sewage pipe includes a sewage branch pipe 1 and a sewage branch pipe 2, and the sewage branch pipe 1 and the sewage branch pipe 2 are connected to the filter chamber 1 and the filter chamber 2 respectively.

[0020] Preferably, solenoid valves are provided on the water inlet branch pipe 1, the water inlet branch pipe 2, the sewage branch pipe 1, the sewage branch pipe 2 and the water outlet pipe.

[0021] The beneficial effects of the present invention are:

[0022] The present invention arranges a plurality of disturbance units in the filter tank. When backwashing is required to flush the dirt accumulated and blocked in the gravel layer, the disturbance unit rotates so that the blades can move the gravel on the bottom layer, so that the gravel is more dispersed in the backwashing water flow, and the collision and friction between the gravel is more intense, thereby improving the dredging effect and avoiding blockage. The air outlet nozzle designed on the turntable can also spray air flow to form a large number of bubbles in the backwashing water flow. The bubbles impact the gravel and promote the separation of the dirt on the gravel. The present invention also arranges a partition in the pre-filter chamber to divide the pre-filter chamber into a filter chamber one and a filter chamber two. At the same time, the water inlet pipe It is also divided into two routes to connect filter chamber one and filter chamber two respectively. Filter chamber one and filter chamber two are connected with sewage branch pipe one and sewage branch pipe two respectively. When the water inlet branch pipe one at the top of filter chamber one is closed and sewage branch pipe one is opened, filter chamber two can filter normally, and the filtered clean water flows back through filter chamber one from the post-filtration bin to flush the sand and gravel in filter chamber one, and sewage is discharged from sewage branch pipe one. In this way, only one water pump is needed to transport sewage to the water inlet pipe in one direction to provide water for reverse flushing, and the filtering state of one of the filter chambers can be maintained during backwashing, and backwashing can be performed without stopping filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of the overall structure of an anti-clogging structure of a filtering sewage treatment device provided in an embodiment of the present invention.

[0025] Figure 2 It is a front view of the overall structure of the present invention.

[0026] Figure 3 It is a stereoscopic diagram of the overall structure of the present invention when viewed from above.

[0027] Figure 4 It is a top view of the overall structure of the present invention.

[0028] Figure 5 for Figure 4 Cross-sectional view at AA in the middle.

[0029] Figure 6 This is a position distribution diagram of the disturbance unit on the support layer plate of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the driving mechanism of the present invention.

[0031] Figure 8It is a stereoscopic diagram of a single disturbance unit of the present invention.

[0032] Description of reference numerals:

[0033] 1. Filter tank, 2. Support layer plate, 3. Pre-filter chamber, 31. Filter chamber one, 32. Filter chamber two, 4. Post-filter chamber, 5. Water inlet pipe, 51. Water inlet branch pipe one, 52. Water inlet branch pipe two, 6. Water outlet pipe, 7. Sewage pipe, 71. Sewage branch pipe one, 72. Sewage branch pipe two, 8. Disturbance unit, 81. Turntable, 82. Blade, 83. Air outlet nozzle, 84. Rotating shaft, 85. One-way bearing, 86. Driven gear, 9. Partition, 10. Drive box, 11. Gear ring, 12. Motor, 13. Drive gear, 14. Rotary joint, 15. Bronchus one, 16. Bronchus two, 17. Solenoid valve one, 18. Solenoid valve two, 19. Solenoid valve three, 20. Solenoid valve four, 21. Solenoid valve five, 22. Solenoid valve six, 23. Solenoid valve seven. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figures 1 to 8 As shown, the first embodiment of the present invention provides an anti-clogging structure for a filtering sewage treatment device, which specifically includes a vertical cylindrical filter tank 1, in which a horizontally arranged support layer plate 2 is fixed, and the support layer plate 2 divides the inner cavity of the filter tank 1 into a pre-filter chamber 3 and a post-filter chamber 4, and the pre-filter chamber 3 is above the post-filter chamber 4. Filter holes are evenly arranged on the support layer plate 2, and the pre-filter chamber 3 is filled with a sand and gravel layer as a filter medium, and the sand and gravel cannot pass through the filter holes. The top of the filter tank 1 is connected to an inlet pipe 5, and the bottom is connected to an outlet pipe 6. The side wall of the pre-filter chamber 3 above the sand and gravel layer is connected to a sewage pipe 7. When sewage is filtered, the sewage enters the pre-filter chamber 3 through the inlet pipe 5, and when it flows through the sand and gravel layer, the sand and gravel layer intercepts the impurities therein, and the clean water enters the post-filter chamber 4 through the filter holes and is discharged from the outlet pipe 6.

[0037] like Figure 5 and Figure 6As shown, a plurality of disturbance units 8 are also installed on the support layer plate 2, each unit comprising a rotating shaft 84, a rotating disk 81 and blades 82, a plurality of inclined blades 82 are evenly fixed on the upper surface of the rotating disk 81, and a plurality of air outlet nozzles 83 are installed. A driving box 10 is fixed at the bottom of the filter tank 1, and a driving mechanism is arranged in the driving box 10. The rotating shafts 84 in all disturbance units 8 pass through the bottom of the support layer plate 2 and the filter tank 1, and are rotatably mounted on the driving box 10 through bearings. In order to prevent the filter tank 1 from leaking water from the rotating shaft 84, a sealing ring is sleeved at the joint between the rotating shaft 84 and the bottom of the filter tank 1. A driven gear 86 is sleeved on the part of the rotating shaft 84 in the driving box 10, and a gear ring 11 is rotatably mounted in the driving box 10, and all driven gears 86 are meshed with the gear ring 11. A motor 12 is fixed at the bottom of the driving box 10, and a driving gear 13 meshed with the gear ring 11 is fixed on the output shaft of the motor 12.

[0038] When backwashing is required, the drain pipe 7 can be opened, the water inlet pipe 5 can be closed, and water can be supplied in reverse from the outlet pipe 6, so that the water can flow through the sand and gravel layer in reverse, flush out the dirt in the sand and gravel layer, and discharge it through the drain pipe 7. At this time, the motor 12 can be started, and the motor 12 drives the gear ring 11 to rotate, thereby driving the driven gear 86 to rotate, so as to drive all disturbance units 8 to rotate synchronously. At this time, the blades 82 on the turntable 81 can not only directly move the sand and gravel sunk on the supporting layer plate 2, so that it is dispersed and rolled in the backwashing water flow, and the collision and friction between the sand and gravel are enhanced, but also can disturb the water flow and increase the impact force of the water flow and the sand and gravel; at the same time, the air flow is sprayed from the air outlet nozzle 83 to form bubbles, which impact the dirt attached to the surface of the sand and gravel and promote peeling.

[0039] Through the above arrangement, the disturbance unit 8 designed in the present invention significantly reduces the risk of pore blockage in the sand and gravel layer and prolongs the filter maintenance period through the dual effects of mechanical stirring and air flow flushing.

[0040] Embodiment 2:

[0041] Based on the first embodiment, the present invention makes further improvements. Figure 5 As shown, in this embodiment, a vertically arranged partition 9 is added in the pre-filter chamber 3, and the partition 9 divides the pre-filter chamber 3 into a filter chamber 1 31 and a filter chamber 2 32 distributed on the left and right. The filter chamber 1 31 and the filter chamber 32 are both filled with sand and gravel layers. Since they are blocked by the partition 9, the sand and gravel layers on both sides are not connected.

[0042] The water inlet pipe 5 is connected to the water inlet branch pipe 1 51 and the water inlet branch pipe 2 52 through a tee pipe, and supplies water to the filter chamber 1 31 and the filter chamber 2 32 respectively. The water inlet branch pipe 1 51 is provided with a solenoid valve 17, and the water inlet branch pipe 2 52 is provided with a solenoid valve 2 18; the sewage pipe 7 is also divided into a sewage branch pipe 1 71 and a sewage branch pipe 2 72, which are respectively connected to the filter chamber 1 31 and the filter chamber 2 32 to discharge sewage. The sewage branch pipe 1 71 is provided with a solenoid valve 3 19, and the sewage branch pipe 2 72 is provided with a solenoid valve 4 20. The water outlet pipe 6 is provided with a solenoid valve 5 21.

[0043] Sewage enters filter chamber 1 31 and filter chamber 2 32 respectively through water inlet branch pipe 1 51 and water inlet branch pipe 2 52. The gravel layers in filter chamber 1 31 and filter chamber 2 32 independently intercept impurities, thereby improving treatment efficiency. The gravel layers in filter chamber 1 31 and filter chamber 2 32 can be backwashed alternately without stopping the normal operation of the filtration system. When backwashing is required, the solenoid valve on one of the water inlet branches can be closed, and the solenoid valve on the corresponding sewage branch can be opened, while the other filter chamber continues to filter. By closing the solenoid valve on the outlet pipe 6, the filtered clean water can flow from the post-filtration chamber 4 to the filter chamber that needs to be flushed, and the gravel layer therein can be flushed in reverse to complete the dredging.

[0044] Since two filter chambers are provided in this embodiment, in order to avoid the disturbance unit 8 in the other filter chamber from rotating when one of the filter chambers is flushed, the disturbance unit 8 is also divided into two groups, corresponding to the two filter chambers respectively. The present invention installs one-way bearings 85 in opposite directions on the rotating shafts 84 of the two groups of disturbance units 8. Since the one-way bearings 85 have the ability to transmit torque in one direction, when the driving motor 12 rotates forward or reversely, it will only drive the disturbance unit 8 in one of the filter chambers to rotate, and the disturbance unit 8 in the other filter chamber is in a slipping state and will not rotate.

[0045] Through the above arrangement, when flushing the gravel layer in one of the filter chambers, the motor 12 can be started to drive the disturbance unit 8 in the filter chamber to rotate, turn over the gravel layer, and discharge the sewage through the sewage branch pipe, while the other chamber maintains the filtering state, thereby realizing continuous treatment without stopping the machine.

[0046] Since both the water inlet branch pipe 1 51 and the water inlet branch pipe 2 52 are supplied with water by the water inlet pipe 5 , the water inlet pipe 5 only needs to be connected to a water pump to meet the requirements of alternating filtering and flushing of the two chambers, and there is no need to install a water pump in the water outlet pipe 6 for reverse water supply.

[0047] Embodiment three:

[0048] On the basis of the second embodiment, since the two filter chambers are flushed alternately, the air outlet nozzles 83 in the two groups of disturbance units 8 also need to work alternately. Figure 3 and Figure 5As shown, the present invention opens a longitudinal airway inside the rotating shaft 84, which is connected to the air outlet nozzle 83 on the rotating disk 81. A one-way valve is provided on the air outlet nozzle 83, and sewage will not enter the air outlet nozzle 83. The air pump is arranged at the bottom of the driving box 10, and the output end of the air pump is connected to the bronchial tube 1 15 and the bronchial tube 2 16 through a three-way pipe. The bronchial tube 1 15 and the bronchial tube 2 16 are respectively provided with a solenoid valve 6 22 and a solenoid valve 7 23. A rotating joint 14 is provided at the bottom of each rotating shaft 84, and the rotating joint 14 is connected to the airway. The bronchial tube 1 15 is connected to the airway on the rotating shaft 84 of all the disturbance units 8 in the filter chamber 1 31, and the bronchial tube 2 16 is connected to the airway on the rotating shaft 84 of all the disturbance units 8 in the filter chamber 2 32.

[0049] After the above arrangement, when one of the filter chambers needs to be flushed, the air pump supplies air to the bronchial pipe, so that the air outlet nozzle 83 at the bottom of the filter chamber sprays air to form an air-water mixed flow with the backwash water flow. When the air bubbles rise in the gap between the sand and gravel, they carry dirt, greatly improving the flushing efficiency. Since the air outlet nozzle 83 also rotates when the turntable 81 rotates, this further enriches the floating trajectory of the airflow.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A filter-type sewage treatment device anti-clogging structure, characterized in that: It comprises a filter tank, wherein a support layer plate is fixed in the filter tank, filter holes are opened on the support layer plate, the support layer plate separates the cavity of the filter tank into a pre-filter chamber and a post-filter chamber, and a sand and gravel layer for filtering is arranged in the pre-filter chamber; The top and bottom of the filter tank are respectively provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with the pre-filter bin, the water outlet pipe is connected with the post-filter bin, and a sewage pipe is provided on the side wall of the pre-filter bin; A plurality of disturbance units are arranged on the support layer plate, and the disturbance unit comprises a turntable rotatably mounted on the support layer plate, and the turntable is provided with blades and air outlet nozzles. When the turntable rotates, the blades turn over the sand and gravel in the sand and gravel layer.

2. The anti-clogging structure of a filtering sewage treatment device according to claim 1, characterized in that: A partition connected to the supporting layer plate is arranged in the pre-filter chamber, and the partition divides the pre-filter chamber into a first filter chamber and a second filter chamber, and a sand and gravel layer is arranged in each of the first filter chamber and the second filter chamber.

3. The anti-clogging structure of a filtering sewage treatment device according to claim 2, characterized in that: A driving box is arranged at the bottom of the filter tank, and a driving mechanism for driving all the turntables to rotate is arranged in the driving box.

4. The anti-clogging structure of a filtering sewage treatment device according to claim 3, characterized in that: The disturbance unit also includes a rotating shaft fixed on the turntable, the rotating shaft passes through the supporting layer plate and the bottom of the filter tank and extends into the drive box, a sealing ring is provided at the connection between the rotating shaft, the supporting layer plate and the bottom of the filter tank, and the rotating shaft is rotatably installed in the drive box.

5. The anti-clogging structure of a filtering sewage treatment device according to claim 4, characterized in that: The driving mechanism comprises: A plurality of one-way bearings, wherein the plurality of one-way bearings are respectively sleeved on a plurality of rotating shafts in the driving box; A plurality of driven gears, wherein the plurality of driven gears are respectively sleeved on a plurality of one-way bearings; A gear ring, which is rotatably mounted in the drive box and meshes with a plurality of driven gears; The motor is fixed on the driving box, and a driving gear meshing with the gear ring is fixed on the output shaft of the motor.

6. The anti-clogging structure of a filtering sewage treatment device according to claim 5, characterized in that: The disturbance units are divided into two groups, which are respectively located in filter chamber one and filter chamber two; the transmission directions of the one-way bearings sleeved on the rotating shafts in the two groups of disturbance units are opposite; when the output shaft of the motor rotates forward, it drives the disturbance unit in filter chamber one to rotate, and when it rotates reversely, it drives the disturbance unit in filter chamber two to rotate.

7. The anti-clogging structure of a filtering sewage treatment device according to claim 6, characterized in that: The blades in the two groups of disturbance units are inclined in opposite directions; when the disturbance units rotate, the corresponding blades drive the sand and gravel to turn upwards.

8. The anti-clogging structure of a filtering sewage treatment device according to claim 6, characterized in that: An airway is provided in the rotating shaft, the airway is connected to the corresponding air outlet nozzle, and a rotating joint connected to the airway is provided at the bottom of the rotating shaft; an air pump is provided at the bottom of the driving box, the air pump is connected to two bronchi, and the two bronchi are respectively connected to the rotating joints corresponding to the two groups of disturbance units.

9. The anti-clogging structure of a filtering sewage treatment device according to claim 2, characterized in that: The filter tank is provided with a water inlet branch pipe 1 and a water inlet branch pipe 2 which are respectively connected to the filter chamber 1 and the filter chamber 2, and the water inlet branch pipe 1 and the water inlet branch pipe 2 are connected to the water inlet pipe through a tee pipe; the sewage pipe includes a sewage discharge branch pipe 1 and a sewage discharge branch pipe 2, and the sewage discharge branch pipe 1 and the sewage discharge branch pipe 2 are respectively connected to the filter chamber 1 and the filter chamber 2.

10. The anti-clogging structure of a filtering sewage treatment device according to claim 9, characterized in that: Solenoid valves are arranged on the water inlet branch pipe 1, the water inlet branch pipe 2, the sewage discharge branch pipe 1, the sewage discharge branch pipe 2 and the water outlet pipe.

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