Sewage pretreatment decontamination device

Abstract

The utility model provides a sewage pretreatment decontamination device. The device comprises a driving bearing, a combined screen, a bracket, a deslagging structure and a flushing structure. The driving bearing is installed on the support and drives the combined screen to rotate. The combined screen comprises a first screen and a second screen which are sequentially arranged on the periphery of the driving bearing from near to far. The first screen and the second screen are connected through the framework, and the mesh size of the first screen is larger than that of the second screen. The combined screen is obliquely fixed to the driving bearing relative to the horizontal plane. The deslagging structure is connected with the support and arranged on the lower portion of the end, close to the horizontal plane, of the second screen, a liquid inlet is formed in the other end opposite to the first screen, and the flushing structure is arranged above the combined screen. The sewage pretreatment decontamination device disclosed by the utility model integrates filtering, deslagging and screen washing structures of multiple screens, is high in treatment effect and compact in structure, does not need to occupy too much space, can output power only by virtue of the driving bearing, and does not need too much energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage pretreatment and decontamination device. Background Art

[0002] Sewage is water that has been deteriorated and can no longer maintain its original function due to the addition of new substances or changes in external conditions. According to the source of sewage, sewage can be divided into industrial wastewater, domestic sewage, commercial sewage and surface runoff. Among them, industrial wastewater comes from sewage from manufacturing, mining and industrial production activities, including runoff or leachate from industrial or commercial storage and processing, and other wastewater that is not domestic sewage. Domestic sewage comes from sanitary sewage or sewer sewage from residential, office buildings, institutions or similar places. Commercial sewage comes from commercial facilities and is non-toxic and harmless sewage with some components exceeding domestic sewage, such as catering sewage, laundry sewage, animal breeding sewage, and sewage from hair salons. Surface runoff comes from rainwater, snow water, highway drainage, etc. Surface runoff does not penetrate into the soil and enters surface water along the streets and land.

[0003] Whether it is industrial wastewater, domestic sewage, commercial sewage or surface runoff, it is generally not a pure liquid component, but also contains a large amount of floating and suspended matter. Usually, at the front end of the purification treatment of these sewage, a screen is set to intercept and remove floating and suspended matter in the sewage.

[0004] The usual practice is to set a coarse screen at the inlet of the pump house sump to initially intercept larger suspended or floating objects. Then set up a sewage channel and install a fine screen in the channel to further intercept the suspended or floating objects in the sewage. There are many devices required to remove these floating or suspended objects, and the operation of these devices depends on the operation of the motor. The energy consumption required during the operation cannot be ignored. Therefore, the existing equipment is not only time-consuming, energy-consuming and space-consuming, but also has a low processing efficiency. Utility Model Content

[0005] Based on the above problems, the purpose of the utility model is to provide a sewage pretreatment and decontamination device, which can not only effectively remove floating matter and suspended matter in sewage to facilitate subsequent sewage purification, but also reduce energy consumption, occupy less space, be easy to operate, and have efficient decontamination.

[0006] To achieve the above-mentioned purpose, the utility model provides a sewage pretreatment and decontamination device, including a driving bearing, a combined screen, a bracket, a slag discharge structure and a flushing structure. The driving bearing is installed on the bracket and drives the combined screen to rotate. The combined screen includes a first screen and a second screen that are sequentially peripheral to the driving bearing from near to far. The first screen and the second screen are connected by a skeleton and the mesh size of the first screen is larger than the mesh size of the second screen. The combined screen is fixed on the driving bearing at an angle relative to a horizontal plane. The slag discharge structure is connected to the bracket and is placed at the lower part of the second screen near one end of the horizontal plane. A liquid inlet is provided at the other end opposite to the first screen. The flushing structure is placed above the combined screen.

[0007] In the technical solution adopted by the utility model, after the sewage enters the combined screen, it is filtered by the first screen and the second screen in turn to intercept the floating objects and suspended objects in the sewage. During the rotation process, the floating objects and suspended objects are affected by gravity and then discharged to the outside through the slag discharge structure. The flushing structure placed above the combined screen can clean the floating objects and suspended objects that are not completely discharged to prevent clogging of the combined screen. The sewage pretreatment and decontamination device of the utility model integrates the filtering, slag discharge and screen flushing structures of multiple screens. It not only has a high treatment effect and a compact structure, but also does not require too much space. It can output power only by driving the bearing, and does not require too much energy consumption.

[0008] As a technical solution of the utility model, the driving bearing includes a main shaft and a bearing driving the main shaft to rotate, the frame is fixed to the main shaft, and the bearing has a base and is fixed on the bracket.

[0009] As a technical solution of the present invention, the skeleton includes a main skeleton and a secondary skeleton with a thickness less than that of the main skeleton, the main skeleton connects the main shaft, the first screen and the second screen in sequence, and the secondary skeleton only connects the first screen and the second screen.

[0010] As a technical solution of the present invention, the inclination angle of the combined screen is 40 to 70 degrees.

[0011] As a technical solution of the present utility model, the combined screen also includes two connecting parts, the first screen and the second screen are both connected to the two connecting parts, the connecting part away from the horizontal plane is provided with the liquid inlet, and the connecting part close to the horizontal plane is provided with a slag discharge port connected to the slag discharge structure.

[0012] As a technical solution of the utility model, the first screen is a plurality of separated first bars, the opposite ends of the first bars are respectively connected to two of the connecting members, and the gap between adjacent first bars is 10 to 100 mm.

[0013] As a technical solution of the utility model, the second screen is a plurality of separated second bars, the opposite ends of the second bars are respectively connected to two of the connecting members, and the gap between adjacent second bars is 1 to 10 mm.

[0014] As a technical solution of the utility model, the bracket includes a main bracket and a secondary bracket, the main bracket stands on the horizontal plane, and the secondary bracket is obliquely fixed to the main bracket and fixedly connected to the combined screen.

[0015] As a technical solution of the utility model, it also includes a baffle fixed to the bracket, and the baffle is movably arranged around the second screen.

[0016] As a technical solution of the utility model, the flushing structure includes a water supply system, a water pipe and a spray head. The water pipe connects the water supply system and the spray head. The spray head is provided with a brush for brushing the outer wall of the second screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of an embodiment of a sewage pretreatment and decontamination device of the utility model.

[0018] Figure 2 It is a right side schematic diagram of an embodiment of the sewage pretreatment and decontamination device of the utility model.

[0019] Figure 3 It is a partial front view of an embodiment of the sewage pretreatment and decontamination device of the utility model.

[0020] Figure 4 It is a right side schematic diagram of the combined screen of the sewage pretreatment and decontamination device of the utility model.

[0021] Figure 5 It is a stereoscopic diagram of the combined screen of the sewage pretreatment and decontamination device of the utility model.

[0022] Component Symbols

[0023] 100-wastewater pretreatment and decontamination device; 10-driving bearing; 11-main shaft; 13-bearing; 30-combined screen; 31-first screen; 32-second screen; 33-slag discharge port; 34-connector; 35-frame; 35a-main frame; 35b-secondary frame; 36-baffle; 37-secondary grid; 38-switch; 50-bracket; 51-main bracket; 53-secondary bracket; 70-slag discharge structure; 90-flushing structure; 91-water supply system; 93-water pipe; 95-sprinkler head DETAILED DESCRIPTION

[0024] In order to better illustrate the purpose, technical solution and beneficial effects of the utility model, the utility model will be further described below in conjunction with the accompanying drawings. It should be noted that the following drawings and descriptions are further explanations of the utility model and should not be used as limitations of the utility model.

[0025] The sewage pretreatment and decontamination device of the utility model can be used as a front-end pretreatment tank and applied to the removal of floating matter and suspended matter in sewage before primary sedimentation or biochemical treatment. Figures 1 to 3 As shown, the sewage pretreatment and decontamination device 100 of the utility model includes a driving bearing 10 , a combined screen 30 , a bracket 50 , a slag discharge structure 70 and a flushing structure 90 .

[0026] Further Figures 1 to 3 As shown, the bracket 50 includes a main bracket 51 and a secondary bracket 53. The main bracket 51 stands on a horizontal plane, and the secondary bracket 53 is tilted and fixed on the main bracket 51. The tilt angle of the secondary bracket 53 can be 40 to 70 degrees. The main bracket 51 and the secondary bracket 53 can both be made of stainless steel, or other materials with certain strength and anti-corrosion function.

[0027] Continue as Figures 1 to 5 As shown, the combined screen 30 includes a first screen 31 and a second screen 32 which are arranged around the driving bearing 10 from near to far. The first screen 31 and the second screen 32 are connected by a frame 35, and the mesh size of the first screen 31 is larger than the mesh size of the second screen 32. The combined screen 30 is fixed on the driving bearing 10 at an angle relative to the horizontal plane. The frame 35 includes a main frame 35a and a secondary frame 35b having a thickness less than that of the main frame 35a. The main frame 35a is connected to the driving bearing 10, the first screen 31 and the second screen 32 in sequence, and the secondary frame 35b is only connected to the first screen 31 and the second screen 32. The strength of the combined screen 30 can be increased by setting the frame 35. The main frame 35a and the secondary frame 35b can be made of stainless steel.

[0028] The end of the second screen 32 close to the horizontal plane is connected to the slag discharge structure 70, and the other end opposite to the first screen 31 is provided with a liquid inlet (not shown in the figure). The inclination angle of the combined screen is 40 to 70 degrees. The combined screen 30 also includes two connecting members 34, the first screen 31 and the second screen 32 are connected to the two connecting members 34, the connecting member 34 away from the horizontal plane is provided with a liquid inlet, and the side close to the horizontal plane is provided with a slag discharge port 33 connected to the slag discharge structure 70. The slag discharge port 33 can be a gap in the skeleton 35 at one end away from the horizontal plane, that is, the solid pollutants (floating objects and suspended objects) are discharged through the gap in the skeleton 35 by gravity. The connecting member 34 can be a circular ring structure, the middle part of the circular ring is connected to the skeleton 35, or the connecting member 34 can also be a disc structure, and the disc is provided with a slag discharge port 33. Of course, the connector 34 and the slag discharge port 33 may also be other structures, and the two connectors 34 may be the same or different, and it is only necessary to satisfy that the connector 34 far from the horizontal plane can allow the liquid to enter the cavity enclosed by the first screen 31, and the connector 34 close to the horizontal plane can discharge the solid pollutants (floating matter and suspended matter) that have been initially intercepted. The slag discharge port 33 only needs to be connected to the cavity enclosed by the second screen 32, and the floating matter and suspended matter blocked by the first screen 31 and the second screen 32 can slide into the slag discharge structure 70 through gravity and hydraulic impact.

[0029] Further, the first screen 31 is a plurality of separated first bars (not shown in the figure), the opposite ends of the first bars are respectively connected to two connectors 34, and the gap between adjacent first bars is 10-100 mm, and further can be 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 mm. The second screen 32 is a plurality of separated second bars 37, the opposite ends of the second bars 37 are respectively connected to two connectors 34, and the gap between adjacent second bars 37 is 1-10 mm, and further can be 1, 2, 5, 6, 8, 10 mm. The sewage enters the cavity enclosed by the first screen 31 through the liquid inlet. Under the action of the driving bearing 10, the first screen 31 rotates, and the floating and suspended matter in the sewage whose size is larger than the gap between the first bars is retained in the cavity enclosed by the first screen 31. The floating and suspended matter with smaller size passes through the first screen 31 under the influence of the rotation force and enters the cavity enclosed by the first screen 31 and the second screen 32. The floating and suspended matter whose size is larger than the gap between the second bars 37 is retained in the cavity enclosed by the first screen 31 and the second screen 32. Finally, the floating and suspended matter in the two cavities enter the slag discharge structure 70 through the slag discharge port 33 and the hydraulic impact under the action of gravity. After the sewage is filtered by two layers, the floating and suspended impurities in the sewage are significantly reduced. At the same time, the sewage after solid-liquid separation is discharged through the peripheral wall of the combined screen 30 (that is, through the gap between adjacent first bars and the gap between adjacent second bars 37).

[0030] The driving bearing 10 is mounted on the bracket 50 and drives the combined screen 30 to rotate. The driving bearing 10 includes a main shaft 11 and a bearing 13 driving the main shaft 11 to rotate. The main shaft 11 is connected to a frame 35, the frame 35 fixes the combined screen 30, and the bearing 13 has a base and is fixed on the bracket 50. Further, two connecting members 34 are fixed to the main frame 35a. Further, a baffle 36 is fixed on the bracket 50, and the baffle 36 is movably arranged around the second screen 32. Specifically, the baffle 36 can be pivotally connected to the secondary bracket 53, because the filtering condition of the combined screen 30 can be observed through the movable baffle 36.

[0031] The flushing structure 90 is placed above the combined screen 30. The flushing structure 90 includes a water supply system 91, a water pipe 93 and a spray head 95. The water pipe 93 connects the water supply system 91 and the spray head 95. The spray head 95 is provided with a brush for brushing the outer wall of the second screen 32. During operation, the brush can always brush the outer wall of the second screen 32 to reduce the scale on the outer wall of the screen. When the brush is not cleaned thoroughly, the switch of the water supply system 91 can be turned on to spray water from the spray head 95 to cooperate with the flushing. The outer wall of the first screen 31 can be self-cleaned by the water filtered out by the second screen 32.

[0032] It is further explained that the slag discharge structure 70 is connected to the bracket 50 and is placed at the lower part of the second screen 32 near the horizontal plane. The slag discharge structure 70 may include a slag discharge bucket (not shown in the figure). Floating objects, suspended impurities, etc. that enter the slag discharge structure 70 from the slag discharge port 33 roll down through the slag discharge port 33 due to gravity. In order to stabilize the slag discharge, a support member may also be provided under the slag discharge bucket.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, it is not limited to those listed in the embodiments. Ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A sewage pretreatment and decontamination device, characterized in that: It includes a driving bearing, a combined screen, a bracket, a slag discharge structure and a flushing structure. The driving bearing is installed on the bracket and drives the combined screen to rotate. The combined screen includes a first screen and a second screen that are sequentially arranged around the driving bearing from near to far. The first screen and the second screen are connected by a skeleton and the mesh size of the first screen is larger than the mesh size of the second screen. The combined screen is fixed on the driving bearing at an angle relative to a horizontal plane. The slag discharge structure is connected to the bracket and is placed at the lower part of the second screen near one end of the horizontal plane. A liquid inlet is arranged at the other end of the first screen opposite to the horizontal plane. The flushing structure is placed above the combined screen.

2. The sewage pretreatment and decontamination device according to claim 1, characterized in that: The driving bearing comprises a main shaft and a bearing for driving the main shaft to rotate, the frame is fixed to the main shaft, and the bearing has a base and is fixed on the bracket.

3. The sewage pretreatment and decontamination device according to claim 2, characterized in that: The skeleton includes a main skeleton and a secondary skeleton with a thickness less than that of the main skeleton, the main skeleton sequentially connects the main shaft, the first screen and the second screen, and the secondary skeleton only connects the first screen and the second screen.

4. The sewage pretreatment and decontamination device according to claim 1, characterized in that: The inclination angle of the combined screen is 40-70°.

5. The sewage pretreatment and decontamination device according to claim 1, characterized in that: The combined screen also includes two connecting parts, the first screen and the second screen are both connected to the two connecting parts, the connecting part away from the horizontal plane is provided with the liquid inlet, and the connecting part close to the horizontal plane is provided with a slag discharge port connected to the slag discharge structure.

6. The sewage pretreatment and decontamination device according to claim 5, characterized in that: The first screen is a plurality of separated first bars, two opposite ends of the first bars are respectively connected to two connecting members, and a gap between adjacent first bars is 10-100 mm.

7. The sewage pretreatment and decontamination device according to claim 5, characterized in that: The second screen is a plurality of separated second bars, the opposite ends of the second bars are respectively connected to two of the connecting members, and the gap between adjacent second bars is 1 to 10 mm.

8. The sewage pretreatment and decontamination device according to claim 1, characterized in that: The support comprises a main support and a secondary support, the main support stands on the horizontal plane, and the secondary support is obliquely fixed to the main support and fixedly connected to the combined screen.

9. The sewage pretreatment and decontamination device according to claim 1, characterized in that: It also includes a baffle fixed to the bracket, and the baffle is movably arranged around the second screen.

10. The sewage pretreatment and decontamination device according to claim 1, characterized in that: The flushing structure comprises a water supply system, a water pipe and a spray head. The water pipe is connected with the water supply system and the spray head. The spray head is provided with a brush for brushing the outer wall of the second screen.

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