A sewage treatment apparatus

Abstract

The application discloses a sewage treatment equipment, which comprises a leaching tower and a sedimentation filter tank which are communicated, the leaching tower comprises a water distribution mechanism, a filler layer and a water collecting tank which are sequentially arranged from top to bottom, and further comprises a shunt backflow mechanism, the shunt backflow mechanism comprises a lifting pump arranged in the water collecting tank and a shunt groove communicated with a discharge end of the lifting pump, the discharge end of the lifting pump is communicated with the water distribution mechanism through a backflow pipe, and the shunt groove is used for limiting the water flow entering the sedimentation filter tank. The lifting pump can form a passage with the water distribution mechanism through a pipeline, so that the water in the water collecting tank can pass through the filler layer multiple times to effectively contact with microorganisms in the filler layer, and the treatment effect of the whole water collecting tank on sewage is ensured; and the water inflow in the sedimentation filter tank is controlled by the lifting pump and the shunt groove, so that the water inflow in the sedimentation filter tank has no change or small change in unit time, and the effective operation of the sedimentation filter tank can be effectively ensured by cooperating with the adsorption filler layer arranged in the sedimentation filter tank.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a wastewater treatment device. Background Technology

[0002] Wastewater filtration devices are mainly used in the wastewater treatment process to carry out biochemical and physical reactions on wastewater, consume and adsorb pollutants in the water, improve water quality, and achieve the purpose of wastewater treatment.

[0003] In the prior art, such as the applicant's earlier patent application number CN202221298818.2 entitled "A Wastewater Treatment Filter Tower Device", the patent has a water collection tank that can temporarily store pre-treated wastewater, and the water collection area and the packing layer above it can carry out biochemical reactions on the wastewater. The reacted wastewater can flow into the sedimentation filter to complete the sedimentation treatment of the wastewater and meet the discharge standards.

[0004] In the aforementioned patented equipment, wastewater is pumped down from the packing layer above the collection area to the denitrification tank, and then overflows directly into the sedimentation tank for sedimentation. However, as wastewater passes through the packing layer, it does not necessarily come into effective contact with and react with the packing layer, resulting in less than ideal treatment efficiency from the existing biochemical reactions. Furthermore, the sedimentation tank's wastewater treatment capacity per unit time is relatively constant. If the pump malfunctions, causing significant fluctuations in the water flow into the leaching tower and sedimentation tank, existing leaching tower devices cannot control these changes, potentially impacting the overall operation of the system. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a sewage treatment equipment that solves the problems of unsatisfactory biochemical treatment effect of sewage and the operation of sedimentation filter tank being greatly affected by water flow.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wastewater treatment device, comprising a leaching tower and a sedimentation filter tank arranged in communication; the leaching tower includes a water distribution mechanism, a packing layer, and a water collection tank arranged sequentially from top to bottom; the water collection tank is divided into a leaching zone and an effluent zone according to the water flow overflow direction; wherein the packing layer is located in the leaching zone.

[0007] A diversion and return mechanism is provided in the effluent zone. The diversion and return mechanism includes a booster pump installed in the water collection tank and a diversion trough connected to the discharge end of the booster pump. The discharge end of the booster pump is connected to the water distribution mechanism through a return pipe. The diversion trough is used to limit the flow rate of water entering the sedimentation filter tank.

[0008] The principle of this invention: Wastewater to be treated is introduced into a water distribution mechanism from an external wastewater tank or pipe. The water distribution mechanism can employ an existing structure with multiple spray pipes. Wastewater falls from above the packing layer through the water distribution mechanism, passing through the packing layer and entering a collection tank. The wastewater in the collection tank is then guided by a lift pump, causing some of it to re-enter the water distribution mechanism along a return pipe, passing through the packing layer together with new wastewater from the outside, thus creating a cycle. The remaining wastewater, under the action of the lift pump, enters a diversion trough and is then introduced into a sedimentation filter for sedimentation treatment. When the flow rate of the external wastewater to be treated is too large, the inflow rate into the sedimentation filter is controlled by the lift pump, ensuring that the inflow rate per unit time in the sedimentation filter is not affected. When a lift pump malfunctions, resulting in excessive water suction, the water flow preferentially enters the diversion trough, which limits the amount of water entering the sedimentation filter, ensuring a relatively consistent inflow rate.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] This invention, based on the existing leaching tower, incorporates a diversion and reflux mechanism. The booster pump forms a pathway with the water distribution mechanism through the reflux pipe, allowing water in the collection tank to circulate multiple times within the packing layer and effectively contact the microorganisms there, ensuring the overall wastewater treatment effect of the collection tank. The inflow rate into the sedimentation filter is controlled by both the booster pump and the diversion channel. When the flow rate of external wastewater is too high, the booster pump ensures that the inflow rate into the sedimentation filter remains relatively constant within a unit of time. Conversely, in the event of a booster pump failure, the diversion channel limits the inflow rate into the sedimentation filter, ensuring minimal or no change within a unit of time, thus guaranteeing the effective operation of the sedimentation filter.

[0011] Furthermore, the diversion channel is divided into an inlet area, a diversion area, a drainage area, and a return area.

[0012] The inlet area is connected to the outlet of the booster pump, the drainage area is connected to the sedimentation filter, and the return flow area is connected to the collection tank.

[0013] The inlet area is adjacent to the outlet area and guides water to the outlet area through an overflow gap. The outlet area is adjacent to the drainage area and the return area. It overflows into the drainage area through the outlet gap and into the return area through the return channel. The outlet gap has a V-shaped structure and the return channel has a rectangular structure. The bottom of the outlet gap is lower than the bottom of the return channel.

[0014] Furthermore, the sedimentation filter includes a tank body, and a baffle installed inside the tank body divides the tank body into two sedimentation zones, and the two sedimentation zones are evenly fed by a diversion channel;

[0015] There are two drainage zones, both of which are adjacent to the water distribution zone and are guided by the diversion gap. The two drainage zones are connected to the two sedimentation zones through the outlet pipes.

[0016] Furthermore, the diversion channel has a rectangular cavity structure with an opening at the top.

[0017] The diversion channel is equipped with two splitting plates that are perpendicular to the bottom of the channel and parallel to its short sidewalls. One side of the splitting plate is fixed to one long sidewall of the diversion channel, and the other side of the splitting plate is fixed to a movable plate that is vertically arranged in the diversion channel. The movable plate is arranged near the other long sidewall of the diversion channel and fixed to the two short sidewalls of the diversion channel. The two splitting plates are arranged at intervals and are equipped with overflow plates.

[0018] Furthermore, the long sidewall of the diversion channel, the two split plates, and the overflow plate form the water inlet area of ​​the rectangular cavity structure, and the overflow notch is opened at the upper end of the overflow plate;

[0019] The overflow plate, two split plates, and movable plate form a rectangular cavity structure for the water distribution area, with two diversion gaps respectively opened at the upper ends of the two split plates within the water distribution area.

[0020] The arbitrary split plate, the fixed plate, the long side wall of the diversion channel and the adjacent short side wall of the long side wall constitute a drainage area with a rectangular cavity structure. The water inlet end of the water outlet pipe is set at the bottom of the diversion channel in the drainage area.

[0021] The movable plate, the other long side wall of the diversion channel, and the two short side walls of the diversion channel form a rectangular cavity structure for the return flow area. The bottom of the diversion channel in the return flow area is provided with a drain outlet and a connecting pipe that is connected to the water collection tank.

[0022] Furthermore, a reflux slot is provided on the movable plate between the two split plates, and the reflux slot is equipped with an adjustable plate that can be adjusted up and down.

[0023] Furthermore, an inlet is provided at the bottom of the diversion channel and near one of the long side walls of the diversion channel in the water inlet area. The inlet is connected to the discharge end of the booster pump. Above the inlet, there are spaced and horizontally arranged cover plates, which are fixed to the long side wall of the diversion channel.

[0024] Furthermore, an inlet is provided at the bottom of the diversion channel and near one of the long side walls of the diversion channel in the water inlet area. The inlet is connected to the discharge end of the booster pump. Above the inlet, there are spaced and horizontally arranged cover plates, which are fixed to the long side wall of the diversion channel.

[0025] Furthermore, the water distribution mechanism includes a horizontally arranged inlet tank, a transition tank, and multiple distribution tanks disposed between the inlet tank and the transition tank.

[0026] The inlet tank is divided into a water passage zone and a water guide zone according to the direction of water overflow. The water passage zone is connected to a sewage pipe, which is connected to a booster pump. The water guide zone is connected to multiple water distribution tanks.

[0027] Furthermore, the water inlet tank is divided into a water passage area and a water guiding area by a baffle. The water passage area has a water inlet at the bottom of the water inlet tank that is connected to each other. A cover plate is provided at the opposite position of the water inlet. The cover plate and the inner wall of the water inlet tank form a water inlet buffer space, and the water inlet buffer space has a water outlet gap facing the baffle.

[0028] Furthermore, the baffle is disposed between the two side walls of the water inlet tank, and the height of the baffle is less than the height of the two side walls of the water inlet tank.

[0029] Furthermore, the length direction of the water distribution trough is perpendicular to the length direction of the water inlet trough, and multiple water distribution troughs are spaced apart along the length direction of the water inlet trough and connected to the water inlet trough.

[0030] Multiple water leakage gaps are provided on both sides of the water distribution trough. These gaps are evenly distributed along the length of the trough and have a V-shaped structure. Attached Figure Description

[0031] Figure 1 This is an external view of the present invention;

[0032] Figure 2 for Figure 1 A structural diagram excluding the perforated plate, top plate, and interceptor plate;

[0033] Figure 3 for Figure 2 A schematic diagram of the structure with the support and filler frame removed;

[0034] Figure 4 This is a schematic diagram showing the coordination of the water distribution mechanism, water collection tank, sedimentation filter tank, and diversion and return mechanism of the present invention.

[0035] Figure 5 This is a schematic diagram showing the installation positions of the diversion tank, lift pump, and sedimentation filter tank in this invention.

[0036] Figure 6 This is a schematic diagram of the installation structure of the sedimentation filter and the diversion channel of the present invention;

[0037] Figure 7 for Figure 6 A structural diagram excluding the front panel;

[0038] Figure 8 This is a schematic diagram of the structure connecting the diversion channel and the two outlet pipes of the present invention;

[0039] Figure 9 This is a schematic diagram of the flow divider channel of the present invention from another angle;

[0040] Figure 10 This is a top view of the flow divider of the present invention;

[0041] Figure 11 for Figure 10Sectional view along line AA;

[0042] Figure 12 for Figure 10 Sectional view along the BB line;

[0043] Figure 13 This is a schematic diagram of the water distribution mechanism of the present invention;

[0044] Figure 14 for Figure 13 Enlarged view of section A in the middle;

[0045] Figure 15 This is a schematic diagram of the water inlet tank of the present invention;

[0046] Figure 16 This is a cross-sectional view of the water inlet tank of the present invention;

[0047] Figure 17 for Figure 16 Enlarged view of section B in the middle;

[0048] Figure 18 for Figure 16 Enlarged view of section C.

[0049] In the diagram: Enclosure 11, Interception Plate 13, Sludge Zone 20, Sludge Discharge Pipe 210, Diversion Channel 3, Inlet Zone 31, Cover Plate 32, Drainage Zone 33, Return Zone 34, Overflow Plate 35, Overflow Notch 36, Diversion Notch 37, Splitting Plate 38, Water Diversion Zone 39, Return Channel Opening 310, Adjustment Plate 311, Movable Plate 312, Drainage Outlet 313, Outlet 314, Inlet 315, Folded Edge 321, Outlet Pipe 4, Sedimentation Zone 7, Central Cylinder 71, Overflow Channel 73, Baffle Plate 74, Water Guide Pipe 8, Inlet Channel 2, Sewage Discharge Hole 21, Baffle Plate 22. 23. Cover plate, 24. Water outlet gap, 25. Water inlet, 26. Secondary buffer area, 27. Water guiding area, 28. Through hole, 29. Water inlet buffer space, 30. Water distribution trough, 301. Water leakage gap, 40. Transition trough, 401. Sludge outlet pipe, 101. Support, 102. Perforated plate, 103. Top plate, 104. Water collection tank, 105. Sedimentation filter, 106. Water outlet area, 107. Lifting pump, 108. Support plate, 109. Return pipe, 110. Connecting rod, 111. Support frame, 112. Sewage pipe, 113. Water inlet pipe, 114. Packing frame, 115. Drainage pipe, 201. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0051] like Figure 1As shown, a wastewater treatment device can be pre-buried underground or designed as an integrated wastewater treatment unit and installed in a predetermined location. The wastewater treatment device in this invention adopts an integrated structure, including a shell and a leaching tower and sedimentation tank 105 disposed within the shell. Figure 1 , 2 As shown, the outer shell includes a support 101 and a top plate 103, a bottom plate and a plurality of perforated plates 102 disposed on the support 101. The main purpose of the outer shell is to reduce the influence of the outside on the internal components of the outer shell, and also to facilitate the installation of other components inside the outer shell. To achieve this purpose and in accordance with the principle of saving materials, the present invention sets the outer shell as a rectangular shell structure surrounded by the support 101 and the plurality of plates.

[0052] The main components inside the outer shell are the filter tower and sedimentation filter 105. For example... Figure 2 , 3 As shown in Figure 4, the filtration tower, from top to bottom, includes a water distribution mechanism, a packing layer, and a water collection tank 104. The water collection tank 104 is a rectangular cavity structure with an open top, formed by multiple mounting plates. Multiple support plates 108 are installed inside the water collection tank 104, which, together with the mounting plates, divide the water collection tank 104 into multiple interconnected chambers. Each chamber can be equipped with a drain pipe 112 for use during equipment flushing or maintenance. A control valve is installed on the drain pipe 112. A support frame 111 is fixed above the support plates 108. The support frame 111 has a multi-layered structure similar to a shelving unit. Multiple packing frames 114 are placed in each layer of the support frame 111, and the structure and placement layout of the multiple packing frames 114 in each layer are identical. The packing frames 114 are used to load packing material, which can be 3-4 cm thick as is commonly used in existing technologies. 3 The hydrophilic polyurethane sponge blocks create an anaerobic environment necessary for nitrifying bacteria to react, efficiently removing total nitrogen. Of course, other microorganisms can also attach to the packing material within the packing frame 114 to facilitate biochemical reactions in the wastewater, removing other pollutants. Multiple packing frames 114 containing packing material constitute a packing layer. A water distribution mechanism is located above the packing layer, communicating with the external wastewater to be treated. This mechanism distributes the wastewater to facilitate contact and reaction between the wastewater and the packing material within the packing layer, thereby removing nitrogen compounds from the wastewater.

[0053] External sewage enters the water distribution mechanism through sewage pipe 201. The sewage from the distribution mechanism passes through the packing layer and falls into the collection tank 104, where it will then enter the sedimentation filter tank 105 for further treatment. However, as the external sewage passes through the packing layer, some of it cannot effectively contact the packing material for treatment, such as… Figure 2-4As shown, for this purpose, the present invention also provides a diversion and return mechanism between the water collection tank 104 and the sedimentation filter tank 105. The diversion and return mechanism includes a lift pump 107 installed in the water collection tank 104 and a diversion channel 3 communicating with the discharge end of the lift pump 107. The discharge end of the lift pump 107 is connected to the water distribution mechanism through a return pipe 109. The diversion channel 3 is used to limit the water flow rate entering the sedimentation filter tank 105. Figure 2 , 4 As shown, the collection tank 104 is divided into a leaching zone and an effluent zone 106. A packing layer is positioned above the leaching zone. Wastewater overflowing from the leaching zone flows into the effluent zone 106. A lift pump 107 is located within the effluent zone 106. The discharge end of the lift pump 107 is connected to a T-junction pipe. One branch of the T-junction pipe is connected to the return pipe 109, and the other branch is connected to the diversion channel 3 via the inlet pipe 113. The lift pump 107 directs wastewater from the effluent zone 106 towards the sedimentation zone 7 and also supplies water to the water distribution mechanism. This allows the water in the collection tank 104 to circulate multiple times within the packing layer, effectively contacting the microorganisms within it, ensuring the overall wastewater treatment effect of the collection tank 104. Furthermore, by controlling the water flow rate into the sedimentation zone 7 through the lift pump 107, the inflow rate into the sedimentation filter 105 is kept relatively consistent within a unit of time, ensuring the effective operation of the sedimentation filter 105.

[0054] To prevent excessive wastewater from entering the sedimentation filter tank 105 due to malfunction of the booster pump 107, this invention includes a diversion channel 3. Specifically, as shown... Figure 8-12As shown, the diversion channel 3 is divided into an inlet zone 31, a diversion zone 39, a drainage zone 33, and a return zone 34. The inlet zone 31 is connected to the discharge end of the booster pump 107 through the inlet pipe 113. The drainage zone 33 is connected to the sedimentation filter 105. The return zone 34 is connected to the collection tank 104 through the drainage pipe 115. The inlet zone 31 is adjacent to the diversion zone 39 and guides water to the diversion zone 39 through the overflow gap 36. The diversion zone 39 is adjacent to the drainage zone 33 and the return zone 34. It overflows into the drainage zone 33 through the diversion gap 37 and overflows into the return zone 34 through the return channel opening 310. The diversion gap 37 has a V-shaped structure, and the return channel opening 310 has a rectangular structure. The bottom of the diversion gap 37 is lower than the bottom of the return channel opening 310. In operation, the booster pump 107 feeds wastewater from the collection tank 104 into the inlet area 31 of the diversion channel 3. The wastewater fills the inlet area 31 and flows into the diversion zone 39 along the overflow notch 36. Because the diversion zone 39 is equipped with a V-shaped diversion notch 37 and a rectangular return channel 310, when the inflow is stable, the wastewater in the diversion zone 39 overflows along the diversion notch 37 to the drainage zone 33 and finally enters the sedimentation filter 105. When the inflow to the inlet area 31 increases (the booster pump 107...), the wastewater overflows into the drainage zone 33 along the diversion notch 37 when the inflow is stable, and finally enters the sedimentation filter 105. 7. In case of an increase in the amount of water entering the water distribution zone 39, when the water volume increases to the position of the return channel 310, the increased sewage in the water distribution zone 39 enters the return zone 34 due to the way the return channel 310 is opened, and falls back into the collection tank 104 through the drain pipe 115. This reduces the probability of the sedimentation filter 105 malfunctioning due to excessive water inflow per unit time, thereby ensuring that the diversion channel 3 can limit the water flow rate entering the sedimentation filter 105.

[0055] The sedimentation filter 105 of this invention adopts the structure of a vertical flow sedimentation filter 105 in the prior art. However, in order to ensure that the sedimentation filter 105 can be maintained during maintenance without shutting down, and to make the structure of the sedimentation filter 105 more compatible with the structure of the outer shell, while also providing the sedimentation filter 105 with a certain wastewater treatment capacity per unit time, such as... Figure 5 , 6As shown in Figure 7, the sedimentation filter 105 of this invention includes a tank body, which is formed by multiple surrounding plates 11. The surrounding plates 11 are integral components of the outer shell and are fixed to the support 101. A partition 74 is provided inside the tank, dividing the tank body into two sedimentation zones 7. Each sedimentation zone 7 has the function of a vertical flow sedimentation filter 105. Specifically, each sedimentation zone 7 has a through-cavity structure with an open top, and a sludge zone 20 with a narrowed opening at the lower end. A central cylinder 71 for centerline positioning is provided inside the sedimentation zone 7. The through-cavity structure of the sedimentation zone 7 can be cylindrical or rectangular. The sedimentation zone 7 of this invention has a rectangular cavity structure with an open top, and the cross-section of the sidewall of the sedimentation zone 7 is a square frame structure. This type of sedimentation filter 105 is more conducive to processing and production, and installation is also more convenient. Multiple overflow channels 73 are provided in the upper part of the sedimentation zone 7. These overflow channels 73 are set against the inner wall of the sedimentation zone 7 and are interconnected to form a ring-shaped overflow channel. Two overflow channels are connected and connected to a water guide pipe 8. The bottom of the sludge zone 20 is provided with a sludge discharge pipe 210 with a valve. To prevent personnel or small animals from falling from above the sedimentation zone 7 into the sedimentation filter tank 105 due to accidents during use, a grid-like interception plate 13 is provided above the sedimentation filter tank 105.

[0056] When the sedimentation zone 7 is in use, external sewage is introduced from the central cylinder 71 and evenly distributed within the sedimentation zone 7. The sludge in the sewage settles and accumulates in the sludge zone 20, while the stratified sewage floats to the top, thus achieving the sedimentation treatment of sludge in the sewage. The stratified sewage overflows from the overflow tank 73 and eventually flows out through the water guide pipe 8 to the subsequent treatment section or is directly discharged. The stratified sludge is discharged from the sludge discharge pipe 210.

[0057] Since the sedimentation filter 105 of the present invention has two sedimentation zones 7, each sedimentation zone 7 needs to be connected to the diversion channel 3 and enter water through the diversion channel 3. Therefore, the diversion channel 3 of the present invention is provided with two drainage zones 33. Both drainage zones 33 are arranged adjacent to the water distribution zone 39 and both are guided by the diversion gap 37. The two drainage zones 33 are connected to the two sedimentation zones 7 through the water outlet pipe 4 respectively.

[0058] To ensure that the diversion tank 3 can uniformly supply water to the two sedimentation zones 7, and to further define the layout of the inlet zone 31, the diversion zone 39, the two drainage zones 33, and the return zone 34 within the diversion tank 3, such as... Figure 8-12As shown, the diversion channel 3 has a rectangular cavity structure with an opening at the top. Inside the diversion channel 3, there are two splitting plates 38 that are perpendicular to the bottom of the channel and parallel to its short sidewalls. One side of the splitting plate 38 is fixed to one long sidewall of the diversion channel 3, and the other side of the splitting plate 38 is fixed to a movable plate 312 that is vertically arranged inside the diversion channel 3. The movable plate 312 is arranged near the other long sidewall of the diversion channel 3 and fixed to the two short sidewalls of the diversion channel 3. The two splitting plates 38 are arranged at intervals and are provided with overflow plates 35. The long sidewall of the diversion channel 3, the two split plates 38, and the overflow plate 35 constitute the water inlet area 31 of the rectangular cavity structure. The overflow notch 36 is opened at the upper end of the overflow plate 35. The overflow plate 35, the two split plates 38, and the movable plate 312 constitute the water diversion area 39 of the rectangular cavity structure. The two diversion notches 37 are respectively opened at the upper ends of the two split plates 38 in the water diversion area 39. The arbitrary split plate 38, the fixed plate, the long sidewall of the diversion channel 3, and the adjacent short sidewall constitute the drainage area 33 of the rectangular cavity structure. The water inlet end of the outlet pipe 4 is set at the bottom of the diversion channel 3 in the drainage area 33 (that is, the outlet 314 opened at the bottom of the diversion channel 3). The movable plate 312, the other long sidewall of the diversion channel 3, and the two short sidewalls of the diversion channel 3 constitute the return area 34 of the rectangular cavity structure. The bottom of the diversion channel 3 in the return area 34 is provided with a drain outlet 313, which is connected to the return pipe 109.

[0059] like Figure 8-12 As shown, the entire diversion tank 3 can be divided into an inlet zone 31, a diversion zone 39, and two drainage zones 33 by the splitting plate 38, movable plate 312, and overflow plate 35 at specific positions, achieving the purpose of diverting the inlet water and ensuring that the entire diversion tank 3 can uniformly supply water to the two sedimentation zones 7. The return zone 34 can control the water flow in the diversion zone 39. A return channel 310 is provided on the movable plate 312 between the two splitting plates 38. The return channel 310 is equipped with an adjustable plate 311 that can be adjusted up and down. The plate can be screwed or slid with damping by the partition plate 74, so that the adjustable plate 311 can limit the depth of the return channel 310, which is used to control the water flow entering the diversion zone 39 to be preferentially guided from the return channel 310 or from the corresponding diversion gap 37, thereby controlling the water flow in the diversion zone 39. Meanwhile, when the flow rate from the inlet zone 31 to the distribution zone 39 is too large, the water in the distribution zone 39 can overflow from the return channel 310 and return through the drain pipe 115 set in the return zone 34, thus preventing the large water flow rate in the distribution zone 39 from affecting the use of the sedimentation zone 7.

[0060] When the booster pump 107 introduces water into the inlet area 31, to avoid excessive water pressure impacting the inlet area 31, which would limit the effectiveness of the entire diversion channel 3, such as... Figure 8-12As shown, the present invention has an inlet 315 at the bottom of the diversion channel 3 in the water inlet area 31 and near one of the long side walls of the diversion channel 3. Above the inlet 315, there are horizontally arranged cover plates 32 spaced apart, and the cover plates 32 are fixed to the long side wall of the diversion channel 3. The cover plates 32 have a rectangular plate structure, and any side of the cover plate 32 is fixed to one of the long side walls of the diversion channel 3. On the two sides of the cover plate 32 adjacent to the side wall, there are downwardly extending flanges 321. The arrangement of the two flanges 321 can allow the water flow impacting the cover plate 32 to flow back downward along the flanges 321, further reducing the water flow velocity. At the same time, after the entire diversion channel 3 is running smoothly, it can reduce the impact on the water flow in the diversion channel 3.

[0061] Based on the existing leaching tower, this invention incorporates a diversion and reflux mechanism. The booster pump 107 forms a passage with the water distribution mechanism through a pipeline, allowing water in the collection tank 104 to circulate multiple times within the packing layer and effectively contact the microorganisms in the packing layer, ensuring the overall wastewater treatment effect of the collection tank 104. The inflow rate in the sedimentation filter 105 is controlled by both the booster pump 107 and the diversion channel 3. When the flow rate of the external wastewater to be treated is too large, the booster pump 107 ensures that the inflow rate in the sedimentation filter 105 remains basically consistent within a unit time. When the booster pump 107 fails, the diversion channel 3 limits the inflow rate of the sedimentation filter 105, ensuring that the inflow rate of the sedimentation filter 105 remains unchanged or changes only slightly within a unit time, thus ensuring the effective operation of the sedimentation filter 105.

[0062] In this invention, an adsorption packing layer can be set in the sedimentation zone 7. The packing material of the adsorption packing layer is polypropylene (PP), polyvinyl chloride (PVC) and fiberglass (FRP). The adsorption packing layer can be selected according to the usage requirements.

[0063] Depending on the usage requirements, a sludge funnel can be installed in each sedimentation zone 7 to remove the less dense sludge from the surface of the stratified water. The sludge funnel can be connected to the sludge discharge pipe 210 through a pipe.

[0064] The aforementioned water distribution mechanism can employ multiple parallel spray pipes, as is common in existing technologies, to achieve dispersed water intake of external sewage. However, without altering the structure and type of the packing layer, the sewage treatment effect can be improved by increasing the residence time of the sewage within the packing layer. In existing technologies, pre-treated sewage is pumped into the water distribution mechanism and sprayed from above the packing layer. The water flow enters the packing layer with an initial velocity, resulting in a relatively low contact time and probability between the packing layer and the sewage. Therefore, this invention improves the structure of the existing water distribution mechanism to ensure that the water flow leaves the mechanism with virtually no initial velocity, thereby increasing the residence time of the sewage within the packing layer.

[0065] Specifically, such as Figure 13-18 As shown, the water distribution mechanism includes a horizontally arranged inlet trough 2 and multiple horizontally arranged water distribution troughs 30 that are connected to the inlet trough 2. The inlet trough 2 is divided into a water passage area and a water guiding area 27 by a baffle 22. The multiple water distribution troughs 30 are connected to the water guiding area 27. The water passage area has a water inlet 25 connected to the bottom of the inlet trough 2. A cover plate 23 is provided above the water inlet 25. The cover plate 23 is located at one end of the inlet trough 2 and forms an inlet buffer space 29 with the inner wall of the inlet trough 2. The inlet buffer space 29 has an outlet gap 24 facing the baffle 22. Both the inlet pipe 113 and the water distribution trough 30 are strip-shaped troughs. The inlet trough 2 is horizontally positioned above and fixed to the support frame 111. The length direction of the water distribution trough 30 is perpendicular to the length direction of the inlet trough 2, and multiple water distribution troughs 30 are spaced apart along the length direction of the inlet trough 2 and are respectively connected to through holes 28 opened on the side wall of the inlet trough 2. At least one connecting rod 110 is provided below the multiple water distribution troughs 30, and the connecting rod 110 is detachably connected to the bracket 101. Figure 2 , 3 As shown, during installation, a level can be used to check whether the installation position of the water distribution trough 30 is horizontal. After the water distribution trough 30 is horizontal, the connecting rod 110 used to support the water distribution trough 30 can be fixed to the bracket 101 at this position with bolts. In order to ensure that the connecting rod 110 effectively supports and levels the water distribution trough 30, the present invention provides three spaced connecting rods 110, which are parallel to the water inlet trough 2 and detachably fixed to the bracket 101.

[0066] like Figure 13 , 14 As shown, to facilitate the overflow of sewage entering the water distribution tank 30 into the packing layer, multiple drainage gaps 301 are provided on both side walls of the water distribution tank 30. These gaps 301 are evenly distributed along the length of the water distribution tank 30 and have a V-shaped structure. When sewage enters the multiple water distribution tanks 30 from the inlet tank 2, theoretically, the other end of the water distribution tank 30 needs to be sealed to allow the sewage to accumulate within the tank before overflowing through the drainage gaps 301. To ensure a more uniform overflow effect from the multiple water distribution tanks 30, the water distribution mechanism includes transition troughs 40 arranged parallel to and at intervals with the inlet tank 2. The multiple water distribution tanks 30 are positioned between the inlet tank 2 and the transition troughs 40, and all of the water distribution tanks 30 are connected to the transition troughs 40. The transition troughs 40 are fixed above the support frame 111. When using it for the first time, increase the inlet water volume to ensure that the sewage can enter the transition pipe from the water distribution tank 30, and then gradually adjust the flow rate so that the sewage can be distributed smoothly in the entire water distribution mechanism.

[0067] The principle behind this invention's ability to improve wastewater treatment is as follows: External wastewater to be treated is pumped into the inlet tank 2. Since the cover plate 23 is positioned relative to the water inlet 25, the water flow entering from the water inlet 25 is decelerated upon impact with the cover plate 23. When the water flow fills the inlet buffer space 29, it overflows from the outlet gap 24. Because the volume of the buffer space is larger than the volume of the outlet gap 24, theoretically, the water exiting from the outlet gap 24 still has a certain outlet velocity. The water flow exiting from the outlet gap 24 is then blocked by the baffle plate 22, further slowing down the flow and achieving a secondary deceleration. When the gap between the cover plate 23 and the baffle plate 22 is filled with water, the water overflows from the baffle plate 22 to the water guiding area 27, thereby entering multiple water distribution tanks 30 for water distribution. The wastewater overflowing from the side wall of the water distribution tank 30 enters the lower packing layer, reacts with the microorganisms in the packing layer, and the wastewater that has completed the reaction enters the collection tank 104 for storage or enters the next wastewater treatment process.

[0068] like Figure 13 , 15 As shown in Figures 16 and 17, the baffle 22 is disposed between the two side walls of the inlet tank 2. The baffle 22 can be disposed perpendicular to the length direction of the inlet tank 2 or disposed along the inclined direction between the two side walls of the inlet tank 2. The baffle 22 and the outlet gap 24 are spaced apart to form a secondary buffer area 26, so that the sewage blocked by the cover plate 23 can achieve secondary buffering and deceleration in the secondary buffer area 26. The decelerated water flow then overflows from the baffle 22 to the water guiding area 27. Therefore, the height of the baffle 22 of the present invention is less than the height of the two side walls of the inlet tank 2.

[0069] like Figure 13 , 16 As shown in Figure 18, the inlet tank 2 and the transition tank 40 are used to continuously introduce pretreated sewage. The sewage may contain sludge or other impurities. Since the water distribution mechanism has a deceleration effect on the inlet water, the water flow velocity entering the inlet tank 2 and the transition tank 40 with the water flow is relatively small. Therefore, the sludge or other impurities mixed in the sewage are easy to settle at the bottom of the inlet tank 2 and the transition tank 40. For this reason, the bottom of the inlet tank 2 and the transition tank 40 of the present invention are provided with sludge discharge holes. The sludge discharge holes are fixed with sludge discharge pipes 401 that are connected to each other. Valves can be installed on the sludge discharge pipes 401 to control the opening and closing of the sludge discharge pipes 401. The pipes can be opened when cleaning is required, and closed when cleaning is not required, which does not affect the use of the entire water distribution mechanism.

[0070] like Figure 2As shown, since the packing frame 114 of the present invention has a rectangular frame structure and the length direction of the packing frame 114 is perpendicular to the length direction of the water distribution trough 30, in order to ensure that the water overflowing from the water distribution trough 30 can evenly distribute water in the packing within the packing frame 114 of this structure, the multiple water distribution troughs 30 of the present invention are arranged in pairs, and the two water distribution troughs 30 in each group are arranged adjacently and used in conjunction. The two water distribution troughs 30 in each group are used in conjunction with a row of packing frames 114 arranged along the length direction of the water distribution trough 30.

[0071] The inlet tank 2 of this invention can perform secondary deceleration treatment on the introduced water flow, which can reduce the flow velocity of sewage entering multiple distribution tanks 30. After the sewage in the distribution tanks 30 is full, it will overflow. The overflowing sewage will fall into the packing layer mainly by gravity and will not have a large initial velocity when leaving the distribution tanks 30. This makes the sewage stay in the packing layer of the same structure for a longer time when using the water distribution mechanism of this invention to guide water, which is more conducive to the contact reaction between sewage and microorganisms in the packing layer and improves the sewage treatment effect.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

Claims

1. A wastewater treatment device, comprising a leaching tower and a sedimentation filter (105) arranged in communication, characterized in that: The filtration tower includes a water distribution mechanism, a packing layer, and a water collection tank (104) arranged sequentially from top to bottom. The water collection tank (104) is divided into a filtration zone and an outlet zone according to the direction of water flow overflow. The packing layer is located above the filtration zone. A diversion and return mechanism is provided in the water outlet area. The diversion and return mechanism includes a lift pump (107) installed in the water collection tank (104) and a diversion trough (3) connected to the discharge end of the lift pump (107). The discharge end of the lift pump (107) is connected to the water distribution mechanism through the return pipe (109). The diversion trough (3) is used to limit the water flow rate entering the sedimentation filter tank (105). The diversion channel (3) is divided into an inlet zone (31), a diversion zone (39), a drainage zone (33), and a return zone (34). The inlet area (31) is connected to the discharge end of the booster pump (107), the drainage area (33) is connected to the sedimentation filter (105), and the return flow area (34) is connected to the collection tank (104). The inlet area (31) is adjacent to the diversion area (39) and guides water to the diversion area (39) through the overflow gap (36). The diversion area (39) is adjacent to the drainage area (33) and the return area (34). It overflows and guides water to the drainage area (33) through the diversion gap (37) and overflows and guides water to the return area (34) through the return channel (310). The diversion gap (37) has a V-shaped structure, the return channel (310) has a rectangular structure, and the bottom of the diversion gap (37) is lower than the bottom of the return channel (310).

2. The wastewater treatment equipment according to claim 1, characterized in that: The sedimentation filter (105) includes a tank body, and a baffle (74) installed in the tank body divides the tank body into two sedimentation zones (7). The two sedimentation zones (7) are evenly fed by a diversion channel (3). There are two drainage zones (33). Both drainage zones (33) are adjacent to the water distribution zone (39) and are guided by the diversion gap (37). The two drainage zones (33) are connected to the two sedimentation zones (7) through the water outlet pipe (4).

3. The wastewater treatment equipment according to claim 2, characterized in that: The diversion channel (3) has a rectangular cavity structure with an opening at the top. The diversion channel (3) is provided with two splitting plates (38) that are perpendicular to the bottom of the channel and parallel to its short sidewalls. One side of the splitting plate (38) is fixed to one long sidewall of the diversion channel (3), and the other side of the splitting plate (38) is fixed to a movable plate (312) that is vertically arranged inside the diversion channel (3). The movable plate (312) is arranged close to the other long sidewall of the diversion channel (3) and fixed to the two short sidewalls of the diversion channel (3). The two splitting plates (38) are arranged at intervals and are provided with overflow plates (35).

4. The wastewater treatment equipment according to claim 3, characterized in that: The long sidewall of the diversion channel (3), the two split plates (38) and the overflow plate (35) form the water inlet area (31) of the rectangular cavity structure, and the overflow notch (36) is opened at the upper end of the overflow plate (35); The overflow plate (35), the two split plates (38) and the movable plate (312) form a rectangular cavity structure water distribution area (39), and the two diversion gaps (37) are respectively opened on the upper end of the two split plates (38) in the water distribution area (39); The arbitrary split plate (38), the fixed plate, the diversion channel (3) and the adjacent short side wall of the long side wall constitute a rectangular cavity structure drainage area (33), and the water outlet pipe (4) inlet end is set at the bottom of the diversion channel (3) of the drainage area (33); The movable plate (312), the other long side wall of the diversion channel (3) and the two short side walls of the diversion channel (3) form a rectangular cavity structure of the return area (34). The bottom of the diversion channel (3) in the return area (34) is provided with a drain outlet (313) and a connecting pipe is connected to the water collection tank (104).

5. A wastewater treatment device according to claim 4, characterized in that: A return channel (310) is provided on the movable plate (312) between the two split plates (38), and the return channel (310) is equipped with an adjustable plate (311) that can be adjusted up and down.

6. A wastewater treatment device according to any one of claims 1 to 5, characterized in that: An inlet (315) is provided in the water inlet area (31) at the bottom of the diversion channel (3) and near one of the long side walls of the diversion channel (3). The inlet (315) is connected to the discharge end of the booster pump (107). Above the inlet (315) is a cover plate (32) arranged at intervals and horizontally, which is fixed to the long side wall of the diversion channel (3).

7. A wastewater treatment device according to any one of claims 1 to 5, characterized in that: The water distribution mechanism includes a horizontally arranged water inlet trough (2), a transition trough (40), and a plurality of water distribution troughs (30) arranged between the water inlet trough (2) and the transition trough (40). The inlet tank (2) is divided into a water passage area and a water guide area (27) according to the direction of water overflow. The water passage area is connected to a sewage pipe (201), which is connected to a booster pump (107). The water guide area (27) is connected to multiple water distribution tanks (30).

8. A wastewater treatment device according to claim 6, characterized in that: The water distribution mechanism includes a horizontally arranged water inlet trough (2), a transition trough (40), and a plurality of water distribution troughs (30) arranged between the water inlet trough (2) and the transition trough (40). The inlet tank (2) is divided into a water passage area and a water guide area (27) according to the direction of water overflow. The water passage area is connected to a sewage pipe (201), which is connected to a booster pump (107). The water guide area (27) is connected to multiple water distribution tanks (30).

9. A wastewater treatment device according to claim 7, characterized in that: The water inlet tank (2) is divided into a water passage area and a water guiding area (27) by a baffle (22). The water passage area has a water inlet (25) at the bottom of the water inlet tank (2). A cover plate (23) is provided opposite to the water inlet (25). The cover plate (23) and the inner wall of the water inlet tank (2) form a water inlet buffer space (29). The water inlet buffer space (29) has a water outlet gap (24) facing the baffle (22).

10. A wastewater treatment device according to claim 8, characterized in that: The water inlet tank (2) is divided into a water passage area and a water guiding area (27) by a baffle (22). The water passage area has a water inlet (25) at the bottom of the water inlet tank (2). A cover plate (23) is provided opposite to the water inlet (25). The cover plate (23) and the inner wall of the water inlet tank (2) form a water inlet buffer space (29). The water inlet buffer space (29) has a water outlet gap (24) facing the baffle (22).

11. A wastewater treatment device according to claim 9 or 10, characterized in that: The baffle (22) is disposed between the two side walls of the water inlet tank (2), and the height of the baffle (22) is less than the height of the two side walls of the water inlet tank (2).

12. A wastewater treatment device according to claim 7, characterized in that: The length direction of the water distribution trough (30) is perpendicular to the length direction of the water inlet trough (2), and multiple water distribution troughs (30) are arranged at intervals along the length direction of the water inlet trough (2) and connected to the water inlet trough (2); Multiple water leakage gaps (301) are provided on both sides of the water distribution trough (30). The multiple water leakage gaps (301) are evenly distributed along the length of the water distribution trough (30), and the water leakage gaps (301) have a V-shaped structure.

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