Spiral conveying device with sewage liquid returning function

Abstract

The utility model relates to a spiral conveying device with a sewage liquid returning function, and relates to the technical field of spiral conveyors, the spiral conveying device comprises a first machine shell, a first rotating shaft, a first spiral blade and a first driving motor, the first rotating shaft is arranged in the first machine shell, and the first spiral blade is assembled on the peripheral side of the first rotating shaft in a continuous spiral shape; the first driving motor is assembled on the side face of the first machine shell and is in transmission connection with the first rotating shaft, a first feeding port is formed in the top of the first machine shell, a first discharging port is formed in the bottom of the first machine shell, and the first discharging port is close to the first driving motor. By means of the spiral conveying device, dirt extrusion treatment is achieved, residual sewage in dirt is effectively separated in cooperation with the detachable filter screen and the sewage recovery tank, the problems that the conveying efficiency is reduced and resistance is increased due to the fact that the sewage is retained in the machine shell are solved, meanwhile, the separated sewage flows back to the front-end treatment process, and the sewage treatment efficiency is improved. And circular treatment is realized to avoid secondary pollution and waste of water resources.

Description

Technical Field

[0001] This application relates to the technical field of screw conveyors, and in particular to a screw conveyor device with a sewage return function. Background Technology

[0002] In the field of wastewater treatment, wastewater often contains a large amount of pollutants, and direct discharge will cause serious environmental pollution. Therefore, effective wastewater treatment is essential. The presence of pollutants in wastewater makes solid-liquid separation a key step in the wastewater treatment process. Only by separating wastewater from pollutants can they be further treated in a targeted manner.

[0003] Screw conveyors are widely used in wastewater treatment. Typically, wastewater first undergoes solid-liquid separation in a grit chamber using a grit screen, which intercepts and separates wastewater from the wastewater. The intercepted wastewater is then conveyed to the inlet of a screw conveyor. The screw conveyor, through the rotation of its helical blades, propels the wastewater axially to its outlet, thus completing the wastewater transport process.

[0004] Regarding the aforementioned technologies, during the process of conveying waste in a screw conveyor, the waste separated by the grid still carries sewage. This sewage cannot be discharged in time during the squeezing process of the screw conveyor and will remain in the screw cavity. The sewage retention will increase the pushing resistance of the screw blades on the waste, which will greatly reduce the conveying efficiency of the screw conveyor. At the same time, the sewage that is not discharged in time may overflow to the discharge port with the waste, causing pollution of the operating environment and greatly reducing the treatment effect of sewage and waste. Utility Model Content

[0005] In view of the shortcomings of the existing technology, one of the objectives of this utility model is to provide a screw conveyor with sewage return function.

[0006] This application provides a screw conveyor device with sewage return function, which adopts the following technical solution:

[0007] A screw conveyor with wastewater return function includes a first housing, a second housing, a first rotating shaft, a second rotating shaft, a first helical blade, a second helical blade, a first drive motor, and a second drive motor. The first rotating shaft is located inside the first housing, the first helical blade is mounted on the outer periphery of the first rotating shaft, and the first drive motor is mounted on the side of the first housing and is drively connected to the first rotating shaft. The top of the first housing has a first inlet, and the bottom of the first housing has a first outlet, with the first outlet close to the first drive motor. The top of the second housing has a second inlet... The second inlet is connected to the first outlet. A second outlet is provided at the end of the second housing away from the second inlet. The second rotating shaft is placed inside the second housing. The second spiral blade is assembled on the outer periphery of the second rotating shaft. The second drive motor is assembled at the end of the second housing away from the second outlet and is coaxially connected to the second rotating shaft. A filter screen is provided on the bottom surface of the second housing. A sewage recovery tank is provided at the bottom of the second housing. A sewage return pipe is provided at the bottom of the sewage recovery tank. One end of the sewage return pipe is connected to the sewage recovery tank, and the other end is connected to the bar screen.

[0008] By adopting the above technical solution, the first and second casings are connected by the first discharge port and the second inlet to form a two-stage spiral conveying structure. The initial extrusion of the first casing and the secondary extrusion of the second casing achieve multiple separations of dirt and sewage, further reducing the amount of sewage contained in the dirt. The filter screen on the bottom of the second casing, together with the bottom sewage recovery tank, allows sewage to be discharged in time through the mesh, avoiding retention inside the casing and solving the problems of reduced conveying efficiency and increased spiral shaft resistance caused by sewage retention in traditional devices. The sewage recovery tank is connected to the grit chamber through the bottom sewage return pipe to form a closed loop of sewage return, allowing the separated sewage to flow back to the front-end treatment process, realizing recycling treatment to avoid secondary pollution and waste of water resources.

[0009] Preferably, the edge of the first feed inlet is provided with an outwardly inclined guide plate.

[0010] By adopting the above technical solution, the outwardly inclined guide plate set at the edge of the first feed inlet can guide the dirt intercepted by the grid to fall smoothly into the first housing along the inclined surface of the guide plate, avoiding the splashing or accumulation of dirt at the edge of the feed inlet caused by direct dumping, thereby making the feeding process smooth, reducing material loss, and at the same time keeping the operating environment around the equipment clean and reducing the frequency of manual cleaning.

[0011] Preferably, the wastewater recovery tank is equipped with a filter device for intercepting impurities, and the wastewater return pipe is located below the filter device.

[0012] By adopting the above technical solution, the filtration device can effectively intercept the fine impurities remaining in the sewage, preventing the impurities from flowing back to the grit chamber or clogging the pipes with the sewage, ensuring the long-term unobstructed flow of the return path. At the same time, by intercepting impurities through the filtration device, the damage of impurities to the sewage return pipes can be reduced, thereby reducing the frequency of pipe maintenance and cleaning costs.

[0013] Preferably, the second discharge port end of the second housing is inclined upward.

[0014] By adopting the above technical solution, the second discharge port is inclined upwards. Gravity can be used to cause the residual sewage to flow upwards along the inclined surface and instead converge towards the bottom of the casing, thus separating it from the sewage. This prevents sewage from overflowing from the discharge port and polluting the operating environment. At the same time, the inclined structure prolongs the residence time of sewage in the casing, which, together with the bottom filter screen, achieves a more thorough separation of sewage and wastewater, further improving the dewatering efficiency of the screw conveyor.

[0015] Preferably, the first discharge port and the second inlet port are connected by a detachable connection.

[0016] By adopting the above technical solution, the first discharge port and the second inlet port are connected by a detachable connection, which facilitates the quick installation, disassembly and maintenance of the two sections of the casing. When it is necessary to clean the inside of the first or second casing, the disassembly and maintenance can be carried out by disassembling the connecting parts, which greatly reduces the difficulty of equipment maintenance. In addition, the detachable design supports the flexible assembly and layout adjustment of the equipment in different installation scenarios.

[0017] Preferably, the filter screen on the bottom surface of the second housing is assembled to the bottom of the second housing via a detachable connection.

[0018] By adopting the above technical solution, the filter screen on the bottom of the second housing is assembled in a detachable connection manner, which makes it easy to quickly disassemble, clean or replace when the filter screen is clogged with dirt. There is no need to disassemble the entire equipment, which greatly shortens the maintenance time and reduces the maintenance cost. The detachable design supports the regular cleaning of impurities such as fibers and mud attached to the mesh, ensuring the long-term stability of sewage infiltration efficiency and avoiding the problems of sewage retention and increased transport resistance caused by clogging.

[0019] Preferably, a power pump is connected to the sewage return pipeline, with the input end of the power pump connected to the sewage return pipeline and the output end connected to the bar screen tank.

[0020] By adopting the above technical solution, the power pump can force the sewage to flow when gravity backflow is insufficient, ensuring that the sewage return process from the sewage recovery tank to the grit chamber is continuous and reliable, avoiding the problem of sewage stagnation or inability to be discharged due to natural backflow resistance. Through the active pumping of the power pump, the return efficiency can be improved, adapting to the return requirements of different installation environments, and ensuring the stable operation of the sewage treatment system.

[0021] Preferably, the blade spacing of the second helical blades gradually decreases along the direction of waste transport.

[0022] By adopting the above technical solution, the blade spacing of the second spiral blade gradually decreases along the direction of waste transport, which allows the second spiral blade to exert a progressive squeezing effect on the waste during rotation, so that the residual sewage in the waste is squeezed out more fully, improving the separation efficiency of waste and sewage, and significantly reducing the moisture content of the finally discharged waste.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The first and second casings are connected by a first discharge port and a second inlet to form a two-stage screw conveyor structure. The initial extrusion of the first casing and the secondary extrusion of the second casing achieve multiple separations of sludge and wastewater, further reducing the amount of wastewater contained in the sludge. The filter screen on the bottom of the second casing, in conjunction with the bottom wastewater recovery tank, allows wastewater to be discharged in a timely manner through the mesh, avoiding retention inside the casing and solving the problems of reduced conveying efficiency and increased screw shaft resistance caused by wastewater retention in traditional devices. The wastewater recovery tank is connected to the grit chamber through the bottom wastewater return pipe, forming a closed loop for wastewater return, allowing the separated wastewater to flow back to the front-end treatment process, achieving recycling treatment to avoid secondary pollution and waste of water resources.

[0025] 2. The outwardly inclined guide plate set at the edge of the first feed inlet can guide the dirt intercepted by the grid to fall smoothly into the first housing along the inclined surface of the guide plate, avoiding the splashing or accumulation of dirt at the edge of the feed inlet caused by direct dumping, thereby making the feeding process smooth, reducing material loss, and keeping the operating environment around the equipment clean, reducing the frequency of manual cleaning.

[0026] 3. The filtration device can effectively intercept the fine impurities remaining in the sewage, preventing them from flowing back into the grit chamber or clogging the pipes, ensuring the long-term unobstructed flow of the return path. At the same time, by intercepting impurities through the filtration device, damage to the sewage return pipes can be reduced, thereby reducing the frequency of pipe maintenance and cleaning costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0028] Figure 2This is a schematic diagram of the structure of the first rotating shaft, the first helical blade, the second rotating shaft, and the second helical blade, as shown in Embodiment 1 of this application.

[0029] Figure 3 Embodiment 1 of this application is a schematic diagram illustrating the structure of the filter screen;

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application;

[0031] Figure 5 This is an enlarged view of Embodiment 2 of this application, showing the disassembly structure of the first discharge port and the second inlet port;

[0032] Figure 6 Embodiment 2 of this application is a schematic diagram illustrating the structure of the filter screen;

[0033] Figure 7 This is an enlarged view of Embodiment 2 of this application, showing the structure for disassembling the filter screen.

[0034] Reference numerals in the attached drawings: 1. First housing; 2. First rotating shaft; 3. First spiral blade; 4. First drive motor; 5. First feed inlet; 6. First discharge outlet; 7. Guide plate; 8. Second housing; 9. Second rotating shaft; 10. Second spiral blade; 11. Second drive motor; 12. Second feed inlet; 13. Second discharge outlet; 14. Wastewater recovery tank; 15. Wastewater return pipeline; 16. Filtration device; 17. Power pump; 18. Filter screen. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0036] This application discloses a screw conveyor device with sewage return function.

[0037] Example 1:

[0038] Reference Figure 1 and Figure 2A screw conveyor with sewage return function includes a first housing 1, a first rotating shaft 2, a first spiral blade 3, and a first drive motor 4. The first rotating shaft 2 is placed inside the first housing 1. The first spiral blade 3 is continuously spirally assembled on the outer periphery of the first rotating shaft 2. The first drive motor 4 is assembled on the side of the first housing 1 and is connected to the first rotating shaft 2 for transmission. A first feed inlet 5 is opened at the top of the first housing 1, and a first discharge outlet 6 is opened at the bottom of the first housing 1, with the first discharge outlet 6 close to the first drive motor 4. When treating sewage, the screen intercepts the dirt in the sewage. The intercepted dirt is transported to the feed inlet of the screw conveyor. At this time, the first drive motor 4 is started, and the first drive motor 4 drives the first rotating shaft 2 and the first spiral blade 3 to rotate, initially compressing the dirt and conveying it axially to the discharge outlet of the screw conveyor.

[0039] Preferably, the edge of the first feed inlet 5 is provided with an outwardly inclined guide plate 7. The guide plate 7 allows the waste to enter the first housing 1 smoothly along the slope when it is poured in, avoiding splashing of waste and sewage.

[0040] Furthermore, the screw conveyor with sewage return function claimed in this embodiment also includes a second housing 8, a second rotating shaft 9, a second spiral blade 10, and a second drive motor 11. A second feed inlet 12 is provided at the top of the second housing 8, communicating with the first discharge outlet 6. A second discharge outlet 13 is provided at the end of the second housing 8 away from the second feed inlet 12. The second rotating shaft 9 is placed inside the second housing 8. The second spiral blade 10 is continuously spirally assembled on the outer periphery of the second rotating shaft 9. The second drive motor 11 is assembled at the end of the second housing 8 away from the second discharge outlet 13 and is coaxially connected to the second rotating shaft 9. When the first housing 1 discharges the initially squeezed waste through the first discharge outlet 6, the squeezed waste is directly screwed into the second feed inlet 12 at the top of the second housing 8. At this time, the second drive motor 11 is activated, driving the second rotating shaft 9 and the second spiral blade 10 to rotate, forming an axial thrust from the second feed inlet 12 to the second discharge outlet 13, conveying the waste to the second discharge outlet 13, while simultaneously performing secondary squeezing.

[0041] Reference Figure 3 The bottom surface of the second housing 8 is equipped with a filter screen 18, and the bottom of the second housing 8 is equipped with a sewage recovery tank 14. The sewage squeezed by the first spiral blade 3 is discharged from the first discharge port 6 into the interior of the second housing 8, and then seeps through the filter screen 18 on the bottom surface of the second housing 8 into the sewage recovery tank 14. The second spiral blade 10 performs a second compression on the sewage entering the second housing 8. The sewage remaining in the sewage seeps out again from the filter screen 18 on the bottom surface of the second housing 8 under the axial thrust and compression of the second spiral blade 10, achieving further solid-liquid separation.

[0042] Preferably, the bottom of the wastewater recovery tank 14 is provided with a wastewater return pipe 15. One end of the wastewater return pipe 15 is connected to the wastewater recovery tank 14, and the other end is connected to the grit chamber. The wastewater recovery tank 14 is provided with a filter device 16 for intercepting impurities, and the wastewater return pipe 15 is located below the filter device 16. After the separated wastewater is collected by the wastewater recovery tank 14, it is returned to the grit chamber by gravity and through the wastewater return pipe 15 with the filter device 16. While the filter device 16 intercepts fine impurities, the pretreatment function of the grit chamber achieves secondary interception of impurities, ensuring that the returned liquid mixes with the original wastewater and re-enters the treatment process, effectively avoiding secondary pollution caused by direct discharge of wastewater.

[0043] Preferably, the second discharge port 13 of the second housing 8 is inclined upward. When the waste after secondary compression moves towards the inclined second discharge port 13 under the push of the second spiral blade 10, the small amount of sewage remaining in the waste separates from the waste due to gravity, and instead gathers towards the bottom surface of the second housing 8, and is discharged from the filter screen 18 on the bottom surface of the second housing 8 to the sewage recovery tank 14.

[0044] The implementation principle of Embodiment 1 of this application is as follows:

[0045] In the wastewater treatment process, a screen first intercepts the impurities in the wastewater, and the intercepted impurities are then conveyed to the first inlet 5 of the screw conveyor. When the first drive motor 4 is started, the motor drives the first rotating shaft 2 to rotate, which in turn causes the first screw blades 3 to rotate synchronously. During this process, the first screw blades 3 initially compress the impurities and simultaneously convey them axially to the first outlet 6 of the first housing 1. The initially compressed impurities are discharged from the first outlet 6 and fall directly into the second inlet 12 at the top of the second housing 8.

[0046] At this time, the second drive motor 11 is started, driving the second rotating shaft 9 and the second spiral blade 10 to rotate, forming an axial thrust from the second feed port 12 to the second discharge port 13, conveying the waste to the second discharge port 13, and simultaneously performing secondary compression on the waste.

[0047] The wastewater generated during the initial compression of the waste by the first spiral blade 3 is discharged from the first discharge port 6 into the interior of the second housing 8, and then permeates through the filter screen 18 on the bottom surface of the second housing 8 before finally being discharged into the wastewater recovery tank 14. When the second spiral blade 10 performs a secondary compression on the wastewater entering the second housing 8, the residual wastewater in the wastewater seeps out again from the filter screen 18 on the bottom surface of the second housing 8 under the axial thrust and compression action of the second spiral blade 10, achieving further solid-liquid separation.

[0048] The second discharge port 13 of the second housing 8 is inclined upwards. The waste after secondary compression moves towards the inclined second discharge port 13 under the push of the second spiral blade 10. The small amount of sewage remaining in the waste separates from the waste due to gravity and instead gathers towards the bottom surface of the second housing 8, and is discharged from the filter screen 18 on the bottom surface to the sewage recovery tank 14. The separated sewage is collected by the sewage recovery tank 14 and then flows back to the grit chamber through the sewage return pipe 15.

[0049] Example 2:

[0050] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 4 and Figure 5 The first discharge port 6 and the second inlet port 12 are connected by a detachable connection. When dirt blocks the connection between the first discharge port 6 and the second inlet port 12, it can be flushed or replaced by disassembling the connection.

[0051] The filter screen 18 on the bottom surface of the second housing 8 is detachably connected to the bottom of the second housing 8. When the sewage discharge from the sewage recovery tank 14 decreases significantly, or when the conveying resistance of the second spiral blade 10 increases, the filter screen 18 on the bottom surface of the second housing 8 may become clogged with dirt. When it is necessary to clean the clogged filter screen 18, it can be removed for flushing or replacement.

[0052] A power pump 17 is connected to the sewage return pipe 15. The input end of the power pump 17 is connected to the sewage return pipe 15, and the output end is connected to the grit chamber. When the gravity return speed of the sewage in the sewage recovery tank 14 is insufficient, the power pump 17 is driven to make the sewage flow along the sewage return pipe 15, ensuring that the sewage can flow into the grit chamber.

[0053] The blade spacing of the second helical blade 10 gradually decreases along the direction of waste transport. The gradually decreasing blade spacing exerts a progressive squeezing effect on the waste during rotation. As the blade spacing decreases, the degree of squeezing of the waste by the second helical blade 10 and the inner wall of the second housing 8 gradually increases when the waste moves axially, further discharging the residual sewage in the waste.

[0054] The implementation principle of Embodiment 2 of this application is as follows:

[0055] When waste blocks the connection between the first discharge port 6 and the second inlet port 12, the connecting parts can be easily disassembled to flush the blocked area or replace the connecting parts, ensuring the smooth flow of the conveying channel and avoiding maintenance inconvenience caused by mechanical connection fixation.

[0056] When the sewage discharge from the sewage recovery tank 14 decreases significantly, or the conveying resistance of the second spiral blade 10 increases during operation, the filter screen 18 can be disassembled for targeted flushing or replacement, so that the separation process of dirt and sewage is always in a continuous and efficient state, and the sewage seepage efficiency is not affected by the clogging of the filter screen 18.

[0057] When the sewage in the sewage recovery tank 14 is limited by gravity backflow speed due to insufficient liquid level, or when there is insufficient backflow power during system operation, the power pump 17 is driven to work. Through the suction and pushing action of the power pump 17, the sewage is forced to flow along the sewage return pipe 15 to the grit chamber, ensuring that the separated sewage is reliably returned to the treatment process and avoiding sewage retention problems caused by failure of natural backflow.

[0058] As the contaminants move axially within the second housing 8, the blade spacing of the second helical blades 10 gradually decreases. This causes the contaminants to be subjected to increasing pressure from the outer edge of the second helical blades 10 and the inner wall of the second housing 8 as they pass through the blade gaps. This gradual pressure allows for gradient pressure treatment of the contaminants, further squeezing out the wastewater remaining inside the contaminants during blade rotation, significantly improving the separation efficiency of contaminants and wastewater.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screw conveyor device with sewage return function, characterized in that, The assembly includes a first housing (1), a second housing (8), a first rotating shaft (2), a second rotating shaft (9), a first spiral blade (3), a second spiral blade (10), a first drive motor (4), and a second drive motor (11). The first rotating shaft (2) is located inside the first housing (1). The first spiral blade (3) is mounted on the outer periphery of the first rotating shaft (2). The first drive motor (4) is mounted on the side of the first housing (1) and is connected to the first rotating shaft (2) in a transmission manner. The first housing (1) has a first feed inlet (5) at the top and a first discharge outlet (6) at the bottom, with the first discharge outlet (6) close to the first drive motor (4). The second housing (8) has a second feed inlet (12) at the top. (12) is connected to the first discharge port (6). The second housing (8) has a second discharge port (13) at one end away from the second inlet (12). The second rotating shaft (9) is placed inside the second housing (8). The second spiral blade (10) is assembled on the outer periphery of the second rotating shaft (9). The second drive motor (11) is assembled at the end of the second housing (8) away from the second discharge port (13) and is coaxially connected with the second rotating shaft (9). The bottom surface of the second housing (8) is provided with a filter screen (18). The bottom of the second housing (8) is provided with a sewage recovery tank (14). The bottom of the sewage recovery tank (14) is provided with a sewage return pipe (15). One end of the sewage return pipe (15) is connected to the sewage recovery tank (14), and the other end is connected to the grit chamber.

2. The screw conveyor device with sewage return function according to claim 1, characterized in that, The first feed inlet (5) is provided with an outwardly inclined guide plate (7) at its edge.

3. The screw conveyor device with sewage return function according to claim 1, characterized in that, The wastewater recovery tank (14) is equipped with a filter device (16) for intercepting impurities, and the wastewater return pipe (15) is located below the filter device (16).

4. A screw conveyor device with sewage return function according to claim 1, characterized in that, The second discharge port (13) of the second housing (8) is inclined upward.

5. A screw conveyor with sewage return function according to claim 1, characterized in that, The first discharge port (6) and the second inlet port (12) are connected by a detachable connection.

6. A screw conveyor device with sewage return function according to claim 1, characterized in that, The filter screen (18) on the bottom surface of the second housing (8) is assembled to the bottom of the second housing (8) by a detachable connection.

7. A screw conveyor device with sewage return function according to claim 1, characterized in that, A power pump (17) is connected to the sewage return pipe (15). The input end of the power pump (17) is connected to the sewage return pipe (15), and the output end is connected to the bar screen.

8. A screw conveyor device with sewage return function according to claim 1, characterized in that, The blade spacing of the second spiral blade (10) gradually decreases along the direction of waste transport.

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