Rotary sand setting system for sewage treatment

Abstract

The utility model relates to a rotary sand setting system for sewage treatment, which comprises a grating filter device and an air lift type rotational flow sand setting device, the upper layer of the grating filter device comprises a water inlet cavity and a filter cavity, a control valve plate is arranged between the water inlet cavity and the filter cavity, the lower side of the water inlet cavity is connected with a water inlet pipe, a rotatable grating is arranged in the filter cavity, and the filter cavity is connected with the air lift type rotational flow sand setting device. A spiral conveyor is arranged at the upper end of the grid filtering device, filtered objects on the grid are poured into the spiral conveyor along with rotation of the grid and are discharged, a flushing pump is arranged on the lower layer of the grid filtering device, a flushing pipe at the output end of the flushing pump is aligned to the grid, and a plurality of connecting pipes are arranged on the side, away from the water inlet cavity, of the filtering cavity. And each connecting pipe is connected with the corresponding gas stripping type rotational flow sand setting device and is provided with a control valve for controlling connection and disconnection. According to the utility model, the grating can be flushed in time and dirt can be discharged, and meanwhile, a plurality of gas stripping type rotational flow sand setting devices can be used for carrying out sand-water separation operation, so that the treatment efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, specifically a rotary grit chamber system for wastewater treatment. Background Technology

[0002] Existing wastewater treatment systems typically include equipment such as coarse grid tanks, fine grid tanks, and grit chambers in the pretreatment filtration stage. For example, patent CN204607814U discloses a novel effluent upgrading treatment system, which includes equipment such as coarse grid tanks, fine grid tanks, grit chambers, and biochemical reaction tanks connected in sequence. Currently, traditional grit chambers include several types such as horizontal flow grit chambers, aerated grit chambers, and vortex grit chambers. Among them, the air-lift vortex grit chamber has been widely used due to its better separation effect. For example, patent CN211133261U discloses an air-lift vortex grit chamber, which includes a vortex grit chamber, an air supply blower, a sand-water separator, and other devices. During operation, the liquid inside the upper part of the vortex grit chamber separates the sand and water from the organic matter through centrifugal force. At the same time, the lower part of the vortex grit chamber is mixed and stirred by a stirring motor and stirring blades. The sand and water discharged from the vortex grit chamber enter the interior of the sand-water separator, so that the filter screen filters the sand and gravel.

[0003] However, for wastewater with complex composition, such as wastewater from industrial parks, the types of enterprises within these parks are diverse, including textile, pharmaceutical, food, rubber, and slaughterhouse enterprises. The industrial wastewater generated by these enterprises is highly complex. In addition, industrial park wastewater also includes some domestic wastewater, which further increases the complexity of the wastewater composition. In existing technologies, the fine screen tank located in front of the air-lift cyclone grit chamber usually only sets fixed fine screens in the tank to achieve suspended solids filtration. For complex wastewater like industrial park wastewater, the fine screens are prone to clogging or incomplete filtration, which will also affect the subsequent operation effect and efficiency of the air-lift cyclone grit chamber.

[0004] In addition, there are some existing technologies for screen sedimentation tank structures. For example, patent CN211435397U discloses a screen grit chamber for domestic sewage, which includes a sedimentation tank body, screen, flushing pipe, nozzles and other structures. It adds a filter screen in front of the screen, and can clean the bottom of the sedimentation tank body and the filter screen by controlling the angle of the nozzle. However, since the controllable angle of the nozzle is limited, it cannot fully flush the screen. Therefore, this device filters and flushes the screen first by adding a filter screen to avoid clogging. However, this structure is not suitable for the treatment needs of airlift cyclone grit chambers. Utility Model Content

[0005] The purpose of this invention is to provide a rotary grit removal system for wastewater treatment, which can realize timely cleaning of the screen and discharge of sludge. At the same time, it can use multiple air-lift cyclone grit removal devices to perform sand-water separation, which greatly improves the treatment efficiency. It is especially suitable for the treatment of large volume and complex wastewater.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A rotary grit removal system for wastewater treatment includes a bar screen filter and an air-lift cyclone grit removal device. The bar screen filter comprises upper and lower layers. The upper layer includes an inlet chamber and a filter chamber, with a control valve plate between them. The lower side of the inlet chamber is connected to an inlet pipe. The filter chamber contains a rotatable bar screen with a support plate for accumulating filter media. A screw conveyor is located at the upper end of the bar screen filter, and the filter media on the bar screen is discharged into the screw conveyor as the bar screen rotates. The lower layer of the bar screen filter is equipped with a flushing pump, and the flushing pipe at the output end of the flushing pump is aligned with the bar screen. Multiple connecting pipes are located on the side of the filter chamber away from the inlet chamber, and each connecting pipe is connected to a corresponding air-lift cyclone grit removal device. A control valve is provided on each connecting pipe to control the on / off state.

[0008] The control valve plate includes a valve plate lifting device and a water-blocking valve plate, and the water-blocking valve plate is controlled to rise and fall by the valve plate lifting device.

[0009] The lower layer of the bar filter device is equipped with a flushing water tank, and the inlet of the flushing pump is connected to the flushing water tank through a pipeline.

[0010] The grid is mounted on a grid base, and the grid base is provided with a rotary drive device and a drive shaft at the upper end and a driven shaft at the lower end. The drive shaft is driven to rotate by the rotary drive device, and both ends of the drive shaft are provided with drive sprockets. Both ends of the driven shaft are provided with driven sprockets. The drive sprockets are connected to the driven sprockets on the corresponding sides by chains. The two sides of the grid are respectively fixed on the chains on the corresponding sides.

[0011] Each airlift cyclone sedimentation device is mounted on a mounting frame. A main sand discharge pipe is provided on the upper side of the mounting frame. One end of the main sand discharge pipe branches off into multiple branch pipes, which are connected to the upper end of the corresponding airlift cyclone sedimentation device. The other end is connected to a sand-water separator. A separator drain pipe is provided on one side of the sand-water separator.

[0012] The air-lift cyclone sedimentation device is provided with a water outlet pipe on one side, and the water outlet pipe is connected to the main water outlet pipe.

[0013] The advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model utilizes a flushing pipe to periodically flush the screen, and the filtered material flushed off accumulates on the various hanging plates of the screen instead of falling back into the wastewater. The screen rotates periodically to pour the filtered material accumulated on the hanging plates into a screw conveyor for discharge. At the same time, the rotation of the screen, combined with the flushing pipe, can achieve a thorough cleaning. Therefore, this utility model can achieve timely flushing of the screen and discharge of dirt, thereby ensuring more thorough filtration.

[0015] 2. This utility model can utilize multiple airlift cyclone grit removal devices for sand-water separation, greatly improving processing efficiency. The control valve plate in the bar screen filter can control the water volume by adjusting the opening degree of the baffle valve plate in conjunction with the processing capacity of each airlift cyclone grit removal device. In addition, this utility model can also control the number of airlift cyclone grit removal devices in operation according to actual needs. For airlift cyclone grit removal devices that are not in operation, simply close the control valve on the corresponding connecting pipe. This makes the use more flexible.

[0016] 3. This utility model makes the overall structure more compact and reduces the floor space occupied by designing the bar filter device into upper and lower layers. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention.

[0018] Figure 2 for Figure 1 AA view in

[0019] Figure 3 for Figure 2 Schematic diagram of the central grille

[0020] Figure 4 for Figure 1 BB view in the middle.

[0021] Among them, 1 is the water inlet pipe, 2 is the bar screen filter device, 201 is the water inlet chamber, 202 is the control valve plate, 2021 is the valve plate lifting device, 2022 is the water baffle valve plate, 203 is the bar screen, 2031 is the bar screen seat, 2032 is the hanging plate, 2033 is the rotary drive device, 204 is the filter chamber, 205 is the screw conveyor, 206 is the mounting base, 207 is the flushing pipe, 208 is the flushing pump, 209 is the flushing water tank, 3 is the connecting pipe, 4 is the air-lift cyclone sand settling device, 401 is the rotating sand settling shell, 402 is the mounting frame, 403 is the blower, 404 is the sand discharge main pipe, 405 is the water outlet pipe, 406 is the sand suction pipe, 407 is the stirring blade, 5 is the sand-water separator, 6 is the water outlet main pipe, and 7 is the separator drain pipe. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, this utility model includes a bar screen filter device 2 and an airlift cyclone sedimentation device 4, wherein... Figure 2 As shown, the bar screen filter device 2 includes upper and lower layers, with the upper layer being the treatment layer and the lower layer being the flushing equipment installation layer. The upper layer of the bar screen filter device 2 includes an inlet chamber 201 and a filter chamber 204, wherein a control valve plate 202 is provided between the inlet chamber 201 and the filter chamber 204. The lower side of the inlet chamber 201 is connected to the inlet pipe 1. A rotatable bar screen 203 is provided inside the filter chamber 204, and as shown... Figure 3 As shown, the grid 203 is equipped with a hanging plate 2032 to support the accumulation of filter material. A screw conveyor 205 is located at the upper end of the grid filter device 2, and the filter material on the grid 203 is discharged into the screw conveyor 205 as the grid 203 rotates. A flushing pump 208 is located at the lower layer of the grid filter device 2, and the flushing pipe 207 at the output end of the flushing pump 208 is aligned with the grid 203. Multiple connecting pipes 3 are located on the side of the filter chamber 204 away from the inlet chamber 201, and each connecting pipe 3 is connected to a corresponding air-lift cyclone grit removal device 4. This invention allows for periodic flushing of the grid 203 using the flushing pipe 207, and the flushed filter material accumulates in a... Figure 3 The filter material accumulated on the hanging plates 2032 will not fall back into the wastewater. The screen 203 rotates periodically. When the hanging plate 2032 rotates to the top of the screen 203, the filter material will be poured into the screw conveyor 205 and discharged in time. At the same time, as the screen 203 rotates, the screen 203 can also be thoroughly cleaned with the flushing pipe 207, thereby ensuring more thorough filtration. In addition, this utility model can connect multiple air-lift cyclone grit removal devices 4 at one time, which also greatly increases the wastewater treatment capacity and meets the treatment needs of large wastewater volumes in industrial parks.

[0024] like Figure 2 As shown, in this embodiment, the control valve plate 202 includes a valve plate lifting device 2021 and a water-blocking valve plate 2022. The water-blocking valve plate 2022 is controlled to rise and fall by the valve plate lifting device 2021 (which may be a cylinder or an electric push rod, etc.). When the water-blocking valve plate 2022 falls completely, it blocks the connection between the water inlet chamber 201 and the filter chamber 204.

[0025] like Figure 2 As shown, in this embodiment, the lower layer of the bar filter device 2 is provided with a flushing water tank 209, and the inlet end of the flushing pump 208 is connected to the flushing water tank 209 through a pipeline.

[0026] like Figure 3As shown, in this embodiment, the grille 203 is mounted on a grille base 2031, and the upper end of the grille base 2031 is provided with a rotary drive device 2033 and a drive shaft, and the lower end is provided with a driven shaft. The drive shaft is driven to rotate by the rotary drive device 2033 (which may be a motor or other device), and both ends of the drive shaft are provided with drive sprockets. Both ends of the driven shaft are provided with driven sprockets. The drive sprockets are connected to the driven sprockets on the corresponding sides by chains. The two sides of the grille 203 are respectively fixed on the chains on the corresponding sides. The rotary drive device 2033 drives the drive shaft to rotate, and then drives the grille 203 to rotate through the sprockets and chains.

[0027] like Figure 2 As shown in this embodiment, the screw conveyor 205 is provided with a mounting base 206 on its upper side, and the rotary drive device 2033 is fixed on the mounting base 206.

[0028] like Figures 1-2 and Figure 4 As shown, in this embodiment, the airlift cyclone sand settling device includes a rotating sand settling shell 401, and the upper end of the rotating sand settling shell 401 of each airlift cyclone sand settling device 4 is mounted on a mounting frame 402. The rotating sand settling shell 401 is provided with a sand suction pipe 406, stirring blades 407 and other devices. A blower 403 is provided on the outside of the mounting frame 402 to supply air to the corresponding airlift cyclone sand settling device 4. A sand discharge main pipe 404 is provided on the upper side of the mounting frame 402, and multiple branch pipes are branched from one end of the sand discharge main pipe 404 and connected to the upper end of the corresponding airlift cyclone sand settling device 4 respectively. The other end is connected to a sand-water separator 5. A separator drain pipe 7 is provided on one side of the sand-water separator 5, and a water outlet pipe 405 is provided on one side of the rotating sand settling shell 401. The water outlet pipe 405 of each airlift cyclone sand settling device 4 is connected to a water outlet main pipe 6.

[0029] The airlift cyclone sedimentation device 4 is a well-known technology in the field. For example, it can be the device in patents such as CN211133261U, CN204699466U, CN210698953U, or other suitable commercially available products.

[0030] In addition, the connecting pipe 3 is equipped with a control valve to control the opening and closing of the pipeline. In this way, the present invention can control the number of working air-lift cyclone sand settling devices 4 according to actual needs. When an air-lift cyclone sand settling device 4 is not working, the control valve on the corresponding connecting pipe 3 can be closed. This can also ensure that the system can be maintained and repaired without stopping the machine. For example, if one air-lift cyclone sand settling device 4 is stopped for maintenance and repair, the other air-lift cyclone sand settling device 4 can perform sand-water separation treatment normally.

[0031] The working principle of this utility model is as follows:

[0032] like Figures 1-2 and Figure 4 As shown, during operation, the water from the inlet pipe 1 first enters the inlet chamber 201 of the bar filter device 2, and then enters the filter chamber 204. The control valve plate 202 controls the flow of water from the inlet chamber 201 to the filter chamber 204 by controlling the baffle valve plate 2022. Wastewater in the filter chamber 204 passes through the bar 203 to filter suspended solids and other contaminants. The bar 203 can be cleaned and the contaminants discharged promptly. Specifically, the flushing pipe 207 periodically flushes the bar 203, and the flushed filter material accumulates in a container such as... Figure 3 The filter material on each hanging plate 2032 of the screen 203 will not fall back into the wastewater. The screen 203 is driven to rotate by the rotary drive device 2033. When the hanging plate 2032 rotates to the top of the screen 203, the filter material accumulated on the hanging plate 2032 will be poured into the screw conveyor 205 and discharged in time. At the same time, the rotation of the screen 203 can also be used in conjunction with the flushing pipe 207 to clean more thoroughly.

[0033] In addition, this invention employs multiple airlift cyclone grit removal devices 4 to improve water treatment efficiency. The water output from the filter chamber 204 enters each airlift cyclone grit removal device 4 through each connecting pipe 3 for sand-water separation. The control valve plate 202 can control the water volume by controlling the opening degree of the baffle valve plate 2022 in conjunction with the processing capacity of each airlift cyclone grit removal device 4. At the same time, this invention can also control the number of airlift cyclone grit removal devices 4 in operation according to actual needs. Airlift cyclone grit removal devices 4 that are not in operation can simply have their control valves on the corresponding connecting pipes 3 closed, making the use more flexible.

Claims

1. A rotating grit system for sewage treatment, characterised in that: The utility model provides a sand filter device, which comprises a grid filtering device (2) and a gas lift type cyclone sand setting device (4), wherein the grid filtering device (2) comprises two layers, the upper layer of the grid filtering device (2) comprises a water inlet cavity (201) and a filtering cavity (204), a control valve plate (202) is arranged between the water inlet cavity (201) and the filtering cavity (204), the lower side of the water inlet cavity (201) is connected with a water inlet pipe (1), a rotatable grid (203) is arranged in the filtering cavity (204), a hanging plate (2032) for supporting the accumulation of filtering materials is arranged on the grid (203), a screw conveyor (205) is arranged at the upper end of the grid filtering device (2), and the filtering materials on the grid (203) are poured into the screw conveyor (205) and discharged as the grid (203) rotates, a flushing pump (208) is arranged at the lower layer of the grid filtering device (2), and a flushing pipe (207) at the output end of the flushing pump (208) is aligned with the grid (203), a plurality of connecting pipes (3) are arranged on the side, away from the water inlet cavity (201), of the filtering cavity (204), and each connecting pipe (3) is connected with a corresponding gas lift type cyclone sand setting device (4), and a control valve for controlling the on-off of the connecting pipe (3) is arranged on the connecting pipe (3).

2. The rotating grit system for sewage treatment according to claim 1, characterized in that: The control valve plate (202) comprises a valve plate lifting device (2021) and a water blocking valve plate (2022), and the water blocking valve plate (2022) is controlled to rise and fall by the valve plate lifting device (2021).

3. The rotating grit system for sewage treatment according to claim 1, characterized in that: A flushing water tank (209) is arranged at the lower layer of the grid filtering device (2), and the water inlet end of the flushing pump (208) is connected with the flushing water tank (209) through a pipeline.

4. The rotating grit system for sewage treatment according to claim 1, characterized in that: The grid (203) is arranged on a grid seat (2031), the upper end of the grid seat (2031) is provided with a rotary driving device (2033) and a driving shaft, and the lower end of the grid seat (2031) is provided with a driven shaft, the driving shaft is driven to rotate by the rotary driving device (2033), driving sprockets are arranged at both ends of the driving shaft, driven sprockets are arranged at both ends of the driven shaft, the driving sprockets are connected with the driven sprockets on the corresponding side through chains, and the grid (203) is fixed on the chains on the corresponding side.

5. The rotating grit system for sewage treatment according to claim 1, characterized in that: The upper end of each gas lift type cyclone sand setting device (4) is mounted on a mounting frame (402), a sand discharge main pipe (404) is arranged on the upper side of the mounting frame (402), one end of the sand discharge main pipe (404) is branched into a plurality of branch pipes which are connected with the upper ends of the corresponding gas lift type cyclone sand setting devices (4), the other end of the sand discharge main pipe (404) is connected with a sand-water separator (5), and one side of the sand-water separator (5) is provided with a separator water discharge pipe (7).

6. The rotating grit system for sewage treatment according to claim 1, characterized in that: One side of the gas lift type cyclone sand setting device (4) is provided with a water outlet pipe (405), and the water outlet pipe (405) is connected with a water outlet main pipe (6).

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