Automatic air and water flushing inclined tube sedimentation tank

Abstract

The utility model discloses an automatic gas water washing's inclined tube sedimentation tank, including the pool body, the sedimentation area of pool body is equipped with inclined tube sedimentation device, gas washing unit and water washing unit, gas washing unit sets up below inclined tube sedimentation device, is used for to the inclined tube sedimentation device area is carried out aeration cleaning, water washing unit sets up above inclined tube sedimentation device, is used for to the inclined tube sedimentation device is washed. The utility model discloses through setting up water washing unit and gas washing unit respectively above and below inclined tube sedimentation device, when the sludge layer thickening of the inner wall of the inclined tube of inclined tube sedimentation device influences the sedimentation effect, through the mode of alternately washing of gas washing cooperation water washing, ensure that the sedimentation tank long -term stable operation has solved the problem of inclined tube blockage, cleaning difficult after long -term operation.

Description

Technical Field

[0001] This utility model relates to the field of efficient solid-liquid separation technology, specifically to an inclined tube sedimentation tank with automatic air-water flushing. Background Technology

[0002] In recent years, with the continuous increase in my country's urbanization rate and the expansion of cities, the scale of urban sewage treatment facilities has also been expanding. Currently, the mainstream sewage treatment processes in urban sewage treatment plants include activated sludge, biofilm, and constructed wetlands; the mainstream odor treatment process is biological deodorization. In recent years, national emission standards for sewage treatment plants have become increasingly stringent, and sewage treatment processes have become increasingly complex, generally including at least three levels of water treatment units. Primary water treatment steps mainly use physical methods, secondary water treatment steps mainly use biological and chemical methods, and tertiary water treatment steps mainly use chemical methods. Different sewage treatment processes use different sewage treatment equipment. Therefore, in actual sewage treatment processes, in addition to the design of the sewage treatment process, the sewage treatment equipment also affects the water treatment effect.

[0003] Sedimentation tanks are a commonly used technology in the primary wastewater treatment process. Among them, inclined tube sedimentation tanks have high surface loading and high solids flux, resulting in high treatment capacity and efficiency, and can significantly save space and operating costs. However, existing inclined tube sedimentation tanks are prone to clogging after long-term operation, affecting the sludge-water separation effect, and are difficult to clean.

[0004] The above-mentioned defects urgently need to be addressed. Utility Model Content

[0005] In order to overcome the problems of easy clogging and difficult cleaning of the inclined tubes after long-term operation of existing inclined tube sedimentation tanks, this utility model provides an inclined tube sedimentation tank with automatic air and water flushing.

[0006] The technical solution of this utility model is as follows: An automatic air-water flushing inclined tube sedimentation tank includes a sedimentation zone equipped with an inclined tube sedimentation device, an air flushing device, and a water flushing device. The air flushing device is located below the inclined tube sedimentation device and is used to aerate and clean the area where the inclined tube sedimentation device is located. The water flushing device is located above the inclined tube sedimentation device and is used to flush the inclined tube sedimentation device.

[0007] As a preferred embodiment of this utility model, the pool body is divided into an inlet guide zone, a sedimentation zone, an upper outlet channel, a lower flushing channel, a clear water pool, a sludge discharge pool, and a flushing water pool. The sedimentation zone is divided from bottom to top into a bottom sludge collection hopper, a lower flow stabilization zone, a middle inclined tube zone, and a top clear water zone. The inlet guide zone is located above one side of the bottom sludge collection hopper. The inclined tube sedimentation device is located in the middle inclined tube zone. The top clear water zone is connected to the upper outlet channel and the lower flushing channel respectively. The upper outlet channel is connected to the clear water pool through a clear water pipe, and a clear water valve is installed on the clear water pipe. The lower flushing channel is connected to the flushing water pool through a flushing pipe, and a flushing valve is installed on the flushing pipe. The bottom sludge collection hopper is connected to the sludge discharge pool through a sludge discharge pipe.

[0008] As a preferred embodiment of this utility model, a sewage outlet pipe connected to the outlet of the biological treatment tank is provided on one side of the water inlet guide zone. The sewage outlet pipe is equipped with an outlet valve. The top side of the water inlet guide zone is connected to the design water level of the biological treatment tank through a water inlet vent pipe. The outlet height of the sewage outlet pipe is lower than the inlet height of the water inlet vent pipe.

[0009] As a preferred embodiment of this utility model, the water inlet guiding area is formed by the pool wall of the pool body and the upper inclined guiding wall and the lower vertical guiding wall inside the pool. The air inlet of the water inlet exhaust pipe and the water outlet of the sewage outlet pipe face the upper end and the lower end of the upper inclined guiding wall, respectively.

[0010] As a preferred embodiment of this utility model, one side of the top clear water zone is connected to the design water level of the biochemical tank through a flushing air discharge pipe, and the height of the air inlet of the flushing air discharge pipe is lower than the design water level of the top clear water zone.

[0011] As a preferred embodiment of this utility model, multiple water collection troughs are provided at the design water level of the top clear water area, which are evenly distributed along the width of the pool. Triangular weirs or water collection holes are provided at the upper ends of both sides of the water collection troughs, and the water outlet of the water collection troughs is connected to the water inlet of the upper water outlet channel.

[0012] As a preferred embodiment of this utility model, a flushing pump group is provided in the flushing water tank, and the water outlet pipe of the flushing pump group is connected to the water flushing device.

[0013] As a preferred embodiment of this utility model, the water flushing device includes two opposing tracks, a flushing truss, a truss drive device, and a hose with a drag chain. The two tracks are respectively fixed on opposite walls of the pool body. The two ends of the flushing truss are slidably connected to the two tracks. The bottom of the flushing truss is provided with multiple horizontally spaced water flushing pipes. The two ends of the multiple water flushing pipes converge to form two pipe openings and are connected to one end of the hose. The other end of the hose is connected to the outlet pipe of the flushing pump group. The truss drive device is fixed on the pool wall of the pool body. The drive end of the truss drive device is connected to the flushing truss and drives the flushing truss to move back and forth along the length of the pool body.

[0014] As a preferred embodiment of the present invention, the inclined tube sedimentation device includes a honeycomb inclined tube with a 60° inclination angle and an inclined tube support for supporting and fixing the honeycomb inclined tube.

[0015] As a preferred embodiment of this utility model, the air flushing device consists of an aeration main pipe and multiple horizontally spaced aeration branch pipes. The aeration branch pipes are fixed below the inclined pipe support. The aeration main pipe is connected to an external blower. Each aeration branch pipe has multiple aeration holes that are evenly and alternately arranged at a downward 45° angle.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By rationally dividing the sedimentation tank into an inlet guide zone, a sedimentation zone, an upper outlet channel, a lower flushing channel, a clear water tank, a sludge discharge tank, and a flushing water tank, and by installing an inclined tube sedimentation device in the sedimentation zone, mud-water separation is achieved, sedimentation efficiency is improved, the area occupied is small, and the operation is stable. 2. By setting up an inlet guide zone, the water flow velocity is rapidly reduced and the flow direction is changed. An inlet and outlet pipe connected to the biological treatment tank is set at the top of the inlet guide zone. This allows the air bubbles in the water to rise and gather, and then be led to the surface of the biological treatment tank for treatment through the inlet and outlet pipe, thus preventing the odor from escaping and balancing the pressure in the sedimentation tank. 3. By installing water flushing devices and air flushing devices above and below the inclined tube sedimentation device respectively, when the mud layer on the inner wall of the honeycomb inclined tube of the inclined tube sedimentation device thickens and affects the sedimentation effect, the sedimentation tank is flushed alternately by air flushing and water flushing, which ensures the long-term stable operation of the sedimentation tank and solves the problem of inclined tube blockage and cleaning difficulties after long-term operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a longitudinal sectional view of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention, along the direction of the clear water tank. Figure 2 This is a longitudinal sectional view of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention, along the direction of the sludge discharge tank. Figure 3 This is a longitudinal sectional view of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention, along the direction of the flushing water tank. Figure 4 This is a transverse cross-sectional view of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention, along the direction of the clear water tank in the upper outlet channel. Figure 5 This is a transverse cross-sectional view of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention, along the direction of the lower flushing channel. Figure 6 This is a transverse cross-sectional view along the bottom sludge hopper direction of an inclined tube sedimentation tank with automatic air-water flushing in one embodiment of the present invention. Figure 7 This is a top view of the air flushing device in one embodiment of the present invention; Figure 8 This is a partial bottom view of the air flushing device in one embodiment of the present invention; Figure 9 This is a schematic diagram of the water rinsing device in one embodiment of the present invention.

[0019] In the diagram, 1. Tank body; 11. Inlet flow guide zone; 111. Upper inclined guide wall; 112. Lower vertical guide wall; 12. Sedimentation zone; 121. Bottom sludge hopper; 1211. Sludge discharge pipe; 1212. Slope; 122. Lower flow stabilization zone; 123. Middle inclined tube zone; 124. Top clear water zone; 1241. Water collection trough; 125. Inclined tube sedimentation device; 1251. Honeycomb inclined tube; 1252. Inclined tube support; 126. Air flushing device; 1261. Aeration main pipe; 1262. Aeration branch pipe; 12621. Aeration hole; 127. Water flushing device; 1271. Track; 12711. Guide channel; 1 272. Flushing truss; 12721. Roller; 1273. Cable chain; 1274. Hose; 1275. Water flushing pipe; 13. Upper water outlet channel; 131. Clean water pipe; 1311. Clean water valve; 14. Lower flushing channel; 141. Flushing pipe; 1411. Flushing valve; 142. Long strip water inlet; 143. Flow stabilizer; 15. Clean water tank; 151. Clean water pump set; 16. Sludge discharge tank; 161. Sludge discharge pump set; 1611. Sludge discharge pipe; 17. Flushing water tank; 171. Flushing pump set; 18. Sewage outlet pipe; 181. Water outlet valve; 19. Water inlet and exhaust pipe; 20. Flushing air discharge pipe. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It is also declared that the embodiments described below are only for explaining this utility model and are not intended to limit this utility model.

[0021] It should be noted that the terms "installation," "setting," "connection," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features.

[0022] like Figures 1 to 6 As shown, this embodiment provides an automatic air-water flushing inclined tube sedimentation tank, including: a tank body 1, which is preferably square to reduce dead corners in the inclined tubes. The tank body 1 is divided into an inlet guide zone 11, a sedimentation zone 12, an upper outlet channel 13, a lower flushing channel 14, a clear water tank 15, a sludge discharge tank 16, and a flushing water tank 17. The sedimentation zone 12 is divided from bottom to top into a bottom sludge collection hopper 121, a lower stabilization zone 122, a middle inclined tube zone 123, and a top clear water zone 124. The inlet guide zone 11 is located above one side of the bottom sludge collection hopper 121. An inclined tube sedimentation device 125 is installed in the middle inclined tube zone 123. An air flushing device 126 is installed below the inclined tube sedimentation device 125 to aerate and clean the area where the inclined tube sedimentation device 125 is located. During the process of the bubbles generated by aeration rising and breaking, they impact and vibrate the sludge film on the inner wall of the inclined tube of the inclined tube sedimentation device 125, causing the sludge film to fall off. A water flushing device 127 is installed above the inclined tube sedimentation device 125. The water flushing device 127 uses water stored in the flushing water tank 17 to flush the inclined tube sedimentation device 125. The top clear water zone 124 is connected to the upper outlet channel 13 and the lower flushing channel 14. The upper outlet channel 13 is connected to the clear water tank 15 through a clear water pipe 131. A clear water valve 1311 is installed on the clear water pipe 131 to control the flow of clear water settled in the top clear water zone 124 into the clear water tank 15. The lower flushing channel 14 is connected to the flushing water tank 17 through a flushing pipe 141. A flushing valve 1411 is installed on the flushing pipe 141 to control the flow of clear water settled in the top clear water zone 124 into the flushing water tank 17. The bottom sludge hopper 121 is connected to the sludge discharge tank 16 through a sludge discharge pipe 1211. The purified wastewater flowing out of the biological treatment tank passes sequentially through the inlet guide zone 11, the bottom sludge collection hopper 121, the lower stabilizing zone 122, the middle inclined tube zone 123, and the top clear water zone 124. The sludge in the water settles to the bottom sludge collection hopper 121 under the action of gravity. To ensure uniform water distribution and reduce the disturbance of the flocs by the effluent, the lower stabilizing zone 122 and the top clear water zone 124 are at least 1m high.

[0023] like Figure 1As shown, a sewage outlet pipe 18 connected to the outlet of the biological treatment tank is provided on one side of the inlet guide zone 11. An outlet valve 181 is installed on the sewage outlet pipe 18, which controls the flow of purified sewage from the biological treatment tank to the inlet guide zone 11. The top of the inlet guide zone 11 is connected to the design water level of the biological treatment tank via an inlet vent pipe 19, and the outlet height of the sewage outlet pipe 18 is lower than the inlet height of the inlet of the inlet vent pipe 19. The inlet guide zone 11 is enclosed by the tank wall of the tank body 1 and an upper inclined guide wall 111 and a lower vertical guide wall 112 within the tank. The inlet of the inlet vent pipe 19 and the outlet of the sewage outlet pipe 18 face the upper and lower ends of the upper inclined guide wall 111, respectively. Water flowing from the biological treatment tank enters the inlet guide zone 11 through the sewage outlet pipe 18. The flow velocity rapidly decreases, and guided by the upper inclined guide wall 111 and the lower vertical guide wall 112, the flow direction changes from horizontal to downward. Simultaneously, air bubbles in the water rise and accumulate in the triangular area at the top of the inlet guide zone 11. These bubbles are then guided to the surface of the biological treatment tank through the inlet exhaust pipe 19, where they are treated by a deodorizing plant cover device before being discharged, preventing odor escape and balancing the pressure in the sedimentation tank. Furthermore, because the air inlet of the inlet exhaust pipe 19 is located below the water surface in the sedimentation tank during operation, the gas from the biological treatment tank will not flow back into the sedimentation tank due to water pressure, thus not affecting the normal operation of the sedimentation tank.

[0024] like Figure 1 As shown, one side of the top clear water zone 124 is connected to the design water level of the biological treatment tank via a flushing air discharge pipe 20. The inlet height of the flushing air discharge pipe 20 is lower than the design water level of the top clear water zone 124, specifically less than 1 meter below it. The flushing air discharge pipe 20 can guide the gas generated during the aeration and cleaning process of the air flushing device 126 to the surface of the biological treatment tank. After treatment by the deodorization device of the biological treatment tank, the gas is discharged, preventing odor from escaping and balancing the pressure of the sedimentation tank. Furthermore, since the inlet of the flushing air discharge pipe 20 is located below the water surface of the sedimentation tank during operation, the gas from the biological treatment tank will not flow back into the sedimentation tank due to water pressure, thus not affecting the normal operation of the sedimentation tank.

[0025] like Figure 1 , Figure 4As shown, multiple water collection troughs 1241 are installed at the design water level of the top clear water zone 124. Triangular weirs or collection holes are installed on the upper sides of both sides of the water collection troughs 1241. The weir loading capacity of the triangular weirs is ≤1.7L / (s・m), ensuring uniform and stable flow velocity without turbulence or vortices when the water flows through the weir. The outlet of the water collection troughs 1241 is connected to the inlet of the upper outlet channel 13. The clear water settled in the top clear water zone 124 is collected through the triangular weirs or collection holes of the water collection troughs 1241 into the upper outlet channel 13, and then discharged into the clear water pool 15 through the upper outlet channel 13. The water collection troughs 1241 are made of stainless steel, possessing high strength, corrosion resistance, and wear resistance. They can withstand long-term erosion by the clear water in the sedimentation tank, while avoiding the detachment of impurities caused by rust in traditional carbon steel materials, ensuring that the effluent water quality is not subject to secondary pollution. Multiple water collection troughs 1241 are evenly distributed along the width of the sedimentation tank. The spacing between the water collection troughs 1241 is 1.2-1.5m. This avoids both excessively large spacing, which would lead to excessively long local water flow paths and uneven water quality, and excessively small spacing, which would increase head loss and construction costs.

[0026] like Figure 3 , Figure 5 As shown, a long strip-shaped inlet 142 is provided on the side of the lower flushing channel 14 near the top clear water zone 124. A flow stabilizing grid 143 is provided at the front end of the long strip-shaped inlet 142. The flow stabilizing grid 143 is composed of strip plates that are staggered front and back, forming a water flow buffer barrier. When the water flow from the top clear water zone 124 enters the lower flushing channel 14 through the long strip-shaped inlet 142, the water flow will collide with and flow around the strip plates, and the flow velocity will be effectively attenuated. The turbulent water flow state is transformed into a stable laminar flow state, which avoids water flow impact causing water level fluctuations in the lower flushing channel 14.

[0027] like Figure 1 , Figure 6 As shown, a water pump unit 151 is installed in the clear water tank 15. The pump unit is a coupled submersible pump, and the outlet pipe of the water pump unit 151 is connected to the disinfection unit. The water pump unit 151 is automatically started and stopped by the liquid level control of the clear water tank 15, and delivers the clear water stored in the tank to the disinfection unit.

[0028] like Figure 1 , Figure 2 , Figure 6As shown, the bottom sludge collection hopper 121 is surrounded by a ramp 1212 facing the center, with an inclination angle ≥55°. The sludge inlet of the sludge discharge pipe 1211 is located in the center of the bottom of the bottom sludge collection hopper 121. A sludge discharge pump set 161 is installed inside the sludge discharge tank 16. The pump set is a coupled, non-clogging submersible pump. The sludge discharge pipe 1611 of the sludge discharge pump set 161 is connected to a sludge storage tank or sludge dewatering equipment. When the sludge discharge pump set 161 is turned on, the sludge level in the sludge discharge tank 16 drops, creating a water level difference between the sedimentation zone 12 and the sludge discharge tank 16. Under water pressure, the sludge in the bottom sludge collection hopper 121 is discharged into the sludge discharge tank 16 through the sludge discharge pipe 1211.

[0029] like Figure 3 , Figure 6 As shown, a flushing pump set 171 is installed in the flushing water tank 17. The outlet pipe of the flushing pump set 171 is connected to the water flushing device 127 to provide flushing water for the water flushing device 127.

[0030] like Figure 3 , Figure 5 As shown, the inclined tube sedimentation device 125 includes a honeycomb inclined tube 1251 with a 60° inclination angle and an inclined tube support 1252 for supporting and fixing the honeycomb inclined tube 1251. The 60° inclination angle of the honeycomb inclined tube 1251 can maximize the settling velocity and ensure that the sludge can smoothly slide to the bottom sludge collection hopper 121 under the action of gravity, avoiding accumulation on the inner wall of the honeycomb inclined tube 1251. The inner diameter of the honeycomb inclined tube 1251 is 80-100mm, which avoids the problem of increased water flow resistance and easy blockage caused by too small a diameter, and also prevents the water flow velocity in the channel from being too fast and the flocs from not settling due to too large a diameter. At the same time, the sufficient diameter provides space for the rise and impact of subsequent air flushing bubbles to ensure the flushing effect. The length of the honeycomb inclined tube 1251 is 1-1.2m to ensure that the residence time of the water in the inclined tube meets the floc settling requirements. The honeycomb inclined tube 1251 is made of PP or stainless steel. PP is corrosion-resistant, lightweight, and moderately cost-effective. It can withstand the erosion of trace acidic and alkaline substances and microbial metabolic products in sewage, and its smooth surface makes it difficult for sludge to adhere. Stainless steel further enhances strength and corrosion resistance, making it suitable for high-salt and highly corrosive water environments. Neither material releases harmful substances, ensuring the safety of the effluent. The inclined tube support 1252 is made of 304 stainless steel. The main beam of the inclined tube support 1252 is made of channel steel, and the bracket is made of flat steel. The channel steel main beam provides high-strength support, stably bearing the weight of the inclined tube and the impact of water flow. The flat steel bracket ensures that the honeycomb inclined tubes 1251 are installed flat and evenly spaced. The corrosion resistance of 304 stainless steel prevents the honeycomb inclined tubes 1251 from loosening or collapsing due to rust, extending the overall service life of the device and reducing replacement and maintenance costs.

[0031] like Figure 7 , Figure 8As shown, the air flushing device 126 consists of an aeration main pipe 1261 and multiple horizontally spaced aeration branch pipes 1262. The aeration branch pipes 1262 are fixed below the inclined tube support 1252. The aeration main pipe 1261 is connected to an external blower. Each aeration branch pipe 1262 has multiple aeration holes 12621 arranged in a uniform, staggered 45° downward angle. The 45° downward angled hole design allows the airflow to be sprayed towards the bottom of the pool first and then rebound and rise, forming a dual trajectory of impact and backflow. When the bubbles generated by aeration rise, they collide vertically with the inner wall of the honeycomb inclined tube 1251. The shock wave and vibration generated by the rupture can efficiently peel off the attached mud film (especially the stubborn mud layer in the dead corner at the bottom of the inclined tube). The staggered arrangement avoids the airflow canceling each other out, ensuring that each channel of the honeycomb inclined tube 1251 can be covered by the airflow, with no blank flushing area. The spacing between the aeration branch pipes 1262 is 250-300mm, the spacing between the aeration holes 12621 is 250-300mm, and the aperture of the aeration holes 12621 is 3-4mm. This ensures that a uniform aeration field is formed during aeration and cleaning, and that each flow channel of the honeycomb inclined tube 1251 is subjected to stable impact, thus avoiding local mud film residue.

[0032] like Figure 4 , Figure 9 As shown, the water rinsing device 127 includes two opposing tracks 1271, a rinsing truss 1272, a truss drive device, and a hose 1274 with a drag chain 1273. The two tracks 1271 are respectively fixed to opposite walls of the pool body 1. The two ends of the rinsing truss 1272 are slidably connected to the two tracks 1271. The bottom of the rinsing truss 1272 is provided with multiple horizontally spaced water flushing pipes 1275. The two ends of the multiple water flushing pipes 1275 converge to form two pipe openings and are connected to one end of the hose 1274. The other end of the hose 1274 is connected to the outlet pipe of the rinsing pump group 171. The truss drive device is fixed to the pool wall of the pool body 1. The drive end of the truss drive device is connected to the rinsing truss 1272 and drives the rinsing truss 1272 to move back and forth along the length of the pool body 1. The cable chain 1273 can protect the hose 1274 from wear and tear caused by the movement of the flushing truss 1272, while ensuring that the hose 1274 can smoothly extend and retract as the truss moves back and forth without the risk of tangling or breakage, thus ensuring the continuity of the flushing process.

[0033] The rinsing truss 1272 is welded from steel square tubing; guide grooves 12711 are provided on both tracks 1271, and the two ends of the rinsing truss 1272 are respectively engaged in the guide grooves 12711 of the two tracks 1271 by rollers 12721, thereby restricting the movement of the rinsing truss 1272 along the width direction and vertical direction of the pool body 1, and only allowing it to move along the length direction of the pool body 1. There are 3-5 water flushing pipes 1275, with a spacing of 250-300mm between adjacent water flushing pipes 1275. The width of the water flushing pipes 1275 matches the width of the inclined tube sedimentation device 125, ensuring that the flushing water flow evenly covers each channel of the honeycomb inclined tube 1251, avoiding insufficient local flushing due to excessive spacing between the water flushing pipes 1275. Each water flushing pipe 1275 has multiple water outlets evenly arranged at a downward 30° angle, and the tilt direction of the water outlets is the same as the tilt direction of the honeycomb inclined tube 1251. The 30° downward tilt design of the water outlets allows the water flow to directly impact the inner wall of the honeycomb inclined tube 1251, concentrating the impact force. The diameter of the water outlet is 3mm. The 3mm diameter generates a high-pressure fine water flow, which can quickly clean the loose mud film remaining on the inner wall of the honeycomb inclined tube 1251, while avoiding water flow dispersion and energy waste caused by excessively large diameters. The truss drive unit drives the flushing truss 1272 to move back and forth along the length of the pool body 1 via a transmission chain and a motor.

[0034] The water flushing device 127, through the aforementioned track 1271, flushing truss 1272, truss drive device, and hose 1274 with drag chain 1273, breaks through the spatial limitations of fixed flushing, not only occupying little space, but also achieving sweeping flushing of the entire inclined tube area without any flushing dead corners.

[0035] After a period of normal sedimentation operation in the sedimentation tank, the mud layer adhering to the inner wall of the honeycomb inclined tubes 1251 of the inclined tube sedimentation device 125 thickens, reducing the sedimentation effect and requiring flushing. Therefore, the sedimentation tank is operated alternately with a normal sedimentation process and an inclined tube flushing process. Under normal operating conditions, the normal sedimentation process lasts for about one week, and the inclined tube flushing process takes about 30 minutes.

[0036] The normal sedimentation process is as follows: Open the outlet valve 181 and the clear water valve 1311, and close the flushing valve 1411. The purified wastewater flowing out of the biological treatment tank passes sequentially through the inlet guide zone 11 and the sedimentation zone 12, and is collected in the upper outlet channel 13 through the collection tank 1241, and then discharged into the clear water tank 15. The clear water pump set 151 is automatically started and stopped by the liquid level of the clear water tank 15, and transports the settled clear water to the disinfection unit. After disinfection treatment, it basically meets the discharge and reuse standards. The sludge settled in the sedimentation zone 12 is collected in the bottom sludge hopper 121 and then in the sludge discharge pipe 1211. The sludge discharge pump set 161 is turned on periodically to discharge the sludge in the sludge discharge tank 16 out of the system. As the sludge level in the sludge discharge tank 16 drops, the sludge in the bottom sludge hopper 121 is discharged into the sludge discharge tank 16 through the sludge discharge pipe 1211 under water pressure.

[0037] The inclined tube flushing process is as follows: ① Turn off the water: Close the water outlet valve 181 and the clean water valve 1311 in sequence.

[0038] ② Sedimentation: Let it stand for a period of time, such as about 10 minutes, so that the mud in the sedimentation zone 12 can completely sink to the bottom and the water in the top clear water zone 124 above the honeycomb inclined tube 1251 of the inclined tube sedimentation device 125 becomes clear.

[0039] ③ First water level reduction: Open flushing valve 1411 to drain the settled water from the top clear water zone 124 to the flushing water tank 17. After the water level in the sedimentation zone 12 drops to about 100mm above the honeycomb inclined tube 1251, close flushing valve 1411. The sedimentation tank typically uses a radar / ultrasonic level sensor to monitor the internal water level changes in the sedimentation zone 12. During the first water level reduction, lowering the water level in the sedimentation zone 12 to about 100mm above the honeycomb inclined tube 1251 avoids the honeycomb inclined tube 1251 affecting the water level sensing of the radar / ultrasonic level sensor, thereby improving the water level control accuracy of the first water level reduction.

[0040] ④ Air flushing: Open the air inlet valve of the external blower connected to the air flushing device 126 to aerate and clean the area where the inclined tube sedimentation device 125 is located. During the process of the bubbles generated by aeration rising and breaking, they impact and vibrate the mud film on the surface of the inclined tube, causing the mud film to fall off. In particular, air flushing can cause most of the attached mud film on the inner wall of the honeycomb inclined tube 1251 to fall off and settle to the bottom mud collection hopper 121 through the impact of bubbles. The remaining small amount of loose mud film is easily carried away by subsequent water flushing, which can significantly reduce the energy consumption and water demand of water flushing, and achieve efficient synergy between air desorption as the main method and water washing as a supplement.

[0041] ⑤ Second water level reduction: Turn on the sludge pump group 161 to lower the sludge water level in the sedimentation zone 12 to about 500mm below the honeycomb inclined tube 1251, in preparation for water flushing.

[0042] ⑥ Water rinsing: Turn on the rinsing pump and use the clean water stored in the rinsing water tank 17 in step ③ to rinse the honeycomb inclined tube 1251 from top to bottom. The rinsing truss 1272 of the water rinsing device 127 moves back and forth along the length of the sedimentation tank while spraying water to ensure that all areas of the honeycomb inclined tube 1251 are covered.

[0043] ⑦ Sludge discharge: Open the sludge discharge pump set 161 to discharge all the sewage generated during flushing and the remaining sludge in the bottom sludge collection hopper 121.

[0044] ⑧ Switch to normal sedimentation: Open the outlet valve 181 and the clear water valve 1311 to end the inclined tube flushing process and switch to the normal sedimentation process.

[0045] In the aforementioned automatic air-water flushing inclined tube sedimentation tank, the tank body 1 is rationally divided into an inlet guide zone 11, a sedimentation zone 12, an upper outlet channel 13, a lower flushing channel 14, a clear water tank 15, a sludge discharge tank 16, and a flushing water tank 17. An inclined tube sedimentation device 125 is installed in the sedimentation zone 12 to achieve sludge-water separation, improve sedimentation efficiency, and has a small footprint and stable operation. By setting up the inlet guide zone 11, the water flow velocity is rapidly reduced and the flow direction is changed. An inlet outlet channel connecting to the biological treatment tank is set at the top of the inlet guide zone 11. Air pipe 19 causes air bubbles in the water to rise and gather, and then leads them to the surface of the biological treatment tank through the inlet and outlet pipe 19 for treatment, preventing odor from escaping and balancing the pressure inside and outside the sedimentation tank; by setting water flushing device 127 and air flushing device 126 above and below the inclined tube sedimentation device 125 respectively, when the mud layer on the inner wall of the honeycomb inclined tube 1251 of the inclined tube sedimentation device 125 thickens and affects the sedimentation effect, air flushing and water flushing are alternately used to ensure the long-term stable operation of the sedimentation tank, and solve the problem of inclined tube blockage and cleaning difficulties after long-term operation.

[0046] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0047] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. An inclined tube sedimentation tank with automatic air-water flushing, characterized in that, The system includes a tank body, and the sedimentation zone of the tank body is equipped with an inclined tube sedimentation device, an air flushing device, and a water flushing device. The air flushing device is located below the inclined tube sedimentation device and is used to aerate and clean the area where the inclined tube sedimentation device is located. The water flushing device is located above the inclined tube sedimentation device and is used to flush the inclined tube sedimentation device.

2. The inclined tube sedimentation tank with automatic air-water flushing according to claim 1, characterized in that, The pool is divided into an inlet guide zone, a sedimentation zone, an upper outlet channel, a lower flushing channel, a clear water pool, a sludge discharge pool, and a flushing water pool. The sedimentation zone is divided from bottom to top into a bottom sludge hopper, a lower stabilizing zone, a middle inclined tube zone, and a top clear water zone. The inlet guide zone is located above one side of the bottom sludge hopper. The inclined tube sedimentation device is located in the middle inclined tube zone. The top clear water zone is connected to the upper outlet channel and the lower flushing channel. The upper outlet channel is connected to the clear water pool through a clear water pipe, which is equipped with a clear water valve. The lower flushing channel is connected to the flushing water pool through a flushing pipe, which is equipped with a flushing valve. The bottom sludge hopper is connected to the sludge discharge pool through a sludge discharge pipe.

3. The inclined tube sedimentation tank with automatic air-water flushing according to claim 2, characterized in that, A sewage outlet pipe connected to the outlet of the biological treatment tank is provided on one side of the water inlet guide zone. The sewage outlet pipe is equipped with an outlet valve. The top side of the water inlet guide zone is connected to the design water level of the biological treatment tank through an inlet vent pipe. The outlet height of the sewage outlet pipe is lower than the inlet height of the inlet of the inlet vent pipe.

4. The inclined tube sedimentation tank with automatic air-water flushing according to claim 3, characterized in that, The water inlet guide zone is enclosed by the pool wall of the pool body and the upper inclined guide wall and the lower vertical guide wall inside the pool. The air inlet of the water inlet exhaust pipe and the water outlet of the sewage outlet pipe face the upper end and the lower end of the upper inclined guide wall, respectively.

5. The inclined tube sedimentation tank with automatic air-water flushing according to claim 2, characterized in that, One side of the top clear water zone is connected to the design water level of the biological tank via a flushing air discharge pipe, and the inlet height of the flushing air discharge pipe is lower than the design water level of the top clear water zone.

6. The inclined tube sedimentation tank with automatic air-water flushing according to claim 2, characterized in that, At the design water level of the top clear water zone, there are multiple water collection troughs evenly distributed along the width of the pool. Triangular weirs or water collection holes are provided at the upper ends of both sides of the water collection troughs. The outlet of the water collection trough is connected to the inlet of the upper water outlet channel.

7. The inclined tube sedimentation tank with automatic air-water flushing according to claim 2, characterized in that, The rinsing pool is equipped with a rinsing pump set, and the outlet pipe of the rinsing pump set is connected to the water rinsing device.

8. The inclined tube sedimentation tank with automatic air-water flushing according to claim 7, characterized in that, The water flushing device includes two opposing tracks, a flushing truss, a truss drive device, and a hose with a drag chain. The two tracks are respectively fixed to opposite pool walls of the pool body. The two ends of the flushing truss are slidably connected to the two tracks. The bottom of the flushing truss is provided with multiple horizontally spaced water flushing pipes. The two ends of the multiple water flushing pipes converge to form two pipe openings and are connected to one end of the hose. The other end of the hose is connected to the outlet pipe of the flushing pump group. The truss drive device is fixed to the pool wall of the pool body. The drive end of the truss drive device is connected to the flushing truss and drives the flushing truss to move back and forth along the length of the pool body.

9. The inclined tube sedimentation tank with automatic air-water flushing according to claim 1, characterized in that, The inclined tube sedimentation device includes a honeycomb inclined tube with a 60° inclination angle and an inclined tube support for supporting and fixing the honeycomb inclined tube.

10. The inclined tube sedimentation tank with automatic air-water flushing according to claim 9, characterized in that, The air flushing device consists of an aeration main pipe and multiple horizontally spaced aeration branch pipes. The aeration branch pipes are fixed below the inclined pipe support. The aeration main pipe is connected to an external blower. Each aeration branch pipe has multiple aeration holes that are evenly and alternately arranged at a downward 45° angle.

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