Sewage treatment equipment

Abstract

The invention discloses sewage treatment equipment which comprises a leaching tower and a sedimentation filter tank which are communicated with each other, the leaching tower comprises a water distribution mechanism, a filler layer and a water collecting tank which are sequentially arranged from top to bottom, the sewage treatment equipment further comprises a flow dividing and backflow mechanism, and the flow dividing and backflow mechanism comprises a lifting pump arranged in the water collecting tank and a flow dividing groove communicated with the discharging end of the lifting pump. The discharge end of the lifting pump is communicated with the water distribution mechanism through a return pipe; the diversion groove is used for limiting the flow of water entering the precipitation filter tank. The lifting pump and the water distribution mechanism can form a passage through a pipeline, so that water in the water collecting tank can pass through the filler layer for multiple times to be in effective contact with microorganisms in the filler layer, and the sewage treatment effect of the whole water collecting tank is ensured; and the water inlet amount in the precipitation filter tank is doubly controlled by the lifting pump and the diversion groove, so that the water inlet amount of the precipitation filter tank is unchanged or slightly changed in unit time, and the effective operation of the precipitation filter tank can be effectively ensured by matching with an adsorption filler layer arranged in the precipitation filter tank.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to sewage treatment equipment. Background Art

[0002] The sewage leaching device is mainly used in the sewage treatment process to carry out biochemical and physical reactions on the sewage, consume and adsorb pollutants in the water, improve water quality, and achieve the purpose of sewage treatment.

[0003] In the prior art, for example, the patent application number CN202221298818.2 previously applied by the present applicant is a patent entitled a sewage treatment leaching tower device. In the patent, a water collection tank is provided to temporarily store pretreated sewage, and the water collection area and the filler layer provided above the water collection tank can carry out a biochemical reaction on the sewage. The sewage after the reaction can flow into the sedimentation filter tank to complete the sedimentation treatment of the sewage, which can meet the discharge standards.

[0004] During the operation of the equipment in the above patent, the sewage falls from the packing layer above the water collection area through the lifting pump and flows back to the denitrification tank, and then directly enters the sedimentation tank for sedimentation treatment by overflow. However, when the sewage passes through the packing layer, it may not be able to effectively contact and react with the packing layer, resulting in the unsatisfactory treatment effect of the biochemical reaction on sewage in the prior art; at the same time, the sewage treatment capacity of the sedimentation tank per unit time is basically fixed. When the lifting pump fails and causes a large change in the water flow entering the leaching tower and the sedimentation tank, the existing leaching tower device cannot control the change in water inlet, which is easy to affect the operation of the entire device. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a sewage treatment device, which solves the problems in the prior art that the biochemical treatment effect of sewage is not ideal and the operation of the sedimentation filter tank is greatly affected by the water flow.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a sewage treatment equipment, comprising a leaching tower and a sedimentation filter tank which are arranged in communication, the leaching tower comprises a water distribution mechanism, a packing layer and a water collection tank which are arranged in sequence from top to bottom, the water collection tank is divided into a leaching area and a water outlet area according to the overflow direction of the water flow, wherein the packing layer is arranged in the leaching area,

[0007] A diversion reflux mechanism is provided in the water outlet area, which includes a lifting pump arranged in the water collection tank and a diversion trough connected to the discharge end of the lifting pump. The discharge end of the lifting pump is connected to the water distribution mechanism through a reflux pipe. The diversion trough is used to limit the water flow entering the sedimentation filter tank.

[0008] The principle of the present invention is as follows: the sewage to be treated is introduced into the water distribution mechanism from an external sewage pool or sewage pipe. The water distribution mechanism can adopt the existing multiple spray pipe structures. The sewage falls from the water distribution mechanism from above the packing layer, and the sewage passes through the packing layer into the water collection tank. The sewage entering the water collection tank is guided by the lifting pump, so that part of the sewage enters the water distribution mechanism again along the return pipe and passes through the packing layer together with the new sewage from the outside, and the cycle is repeated; the other part of the sewage enters the diversion trough under the action of the lifting pump, and then is introduced into the sedimentation filter tank for sedimentation treatment. When the flow rate of the external sewage to be treated is too large, the water inlet flow rate in the sedimentation filter tank is controlled by the lifting pump, which does not affect the water inlet per unit time in the sedimentation filter tank; when the lifting pump fails and the amount of water sucked is too large, the water flow enters the diversion trough first, and the diversion trough can limit the amount of water entering the sedimentation filter tank, so that the water inlet flow rate in the sedimentation filter tank is basically consistent.

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

[0010] The present invention is provided with a diversion reflux mechanism on the basis of the existing leaching tower. The lifting pump can form a passage with the water distribution mechanism through the reflux pipe, so that the water in the water collection tank can pass through the packing layer for multiple times and effectively contact the microorganisms in the packing layer, thereby ensuring the sewage treatment effect of the entire water collection tank; and the water inflow into the sedimentation filter is doubly controlled by the lifting pump and the diversion trough. When the flow rate of the external sewage to be treated is too large, the setting of the lifting pump can ensure that the water inflow into the sedimentation filter is basically consistent within a unit time. When the lifting pump fails, the diversion trough can limit the water inflow into the sedimentation filter, thereby ensuring that the water inflow into the sedimentation filter does not change or changes very little within a unit time, thereby ensuring the effective operation of the sedimentation filter.

[0011] Furthermore, the diversion trough is divided into a water inlet area, a water diversion area, a drainage area and a reflux area.

[0012] The water inlet area is connected to the discharge end of the lifting pump, the drainage area is connected to the sedimentation filter tank, and the return area is connected to the water collection tank;

[0013] Among them, the water inlet area is adjacent to the water diversion area and water is diverted to the water diversion area through the overflow gap. The water diversion area is adjacent to the drainage area and the reflow area, and water overflows to the drainage area through the diversion gap and overflows into the reflow area through the reflow groove. The diversion gap has a V-shaped structure, the reflow groove has a rectangular structure, and the bottom position of the diversion gap is lower than the bottom position of the reflow groove.

[0014] Furthermore, the sedimentation filter tank includes a tank body, a partition plate arranged in the tank body divides the tank body into two sedimentation areas, and the two sedimentation areas are evenly fed with water through a diversion trough;

[0015] There are two drainage areas, both of which are arranged adjacent to the water diversion area and both conduct water through the diversion gap. The two drainage areas are connected to the two sedimentation areas through the outlet pipes respectively.

[0016] Furthermore, the diversion slot is a rectangular cavity structure with an upper opening.

[0017] Two split plates are provided in the diversion trough, which are perpendicular to the bottom of the trough and parallel to the short side walls thereof. One side of the split plate is fixed to a long side wall of the diversion trough, and the other side of the split plate is fixed to a movable plate vertically arranged in the diversion trough. The movable plate is arranged close to the other long side wall of the diversion trough and fixed to the two short side walls of the diversion trough, wherein the two split plates are arranged at intervals and provided with overflow plates.

[0018] Furthermore, a long side wall of the diversion trough, two split plates and an overflow plate constitute a water inlet area of ​​a rectangular cavity structure, and an overflow notch is provided at the upper end of the overflow plate;

[0019] The overflow plate, the two split plates and the movable plate constitute a water splitting area of ​​a rectangular cavity structure, and the two flow splitting notches are respectively opened at the upper ends of the two split plates in the water splitting area;

[0020] Any split plate, fixed plate, a long side wall of the diverter trough and a short side wall adjacent to the long side wall form a drainage area of ​​a rectangular cavity structure, and the water inlet end of the water outlet pipe is arranged at the bottom of the diverter trough in the drainage area;

[0021] The movable plate, the other long side wall of the diversion trough and the two short side walls of the diversion trough form a reflux area of ​​a rectangular cavity structure. A drainage port is provided at the bottom of the diversion trough in the reflux area and is connected to a pipe and communicated with a water collection tank.

[0022] Furthermore, a reflow notch is provided on the movable plate at a position between the two split plates, and the reflow notch is used in conjunction with an adjustment plate that can be adjusted up and down.

[0023] Furthermore, a water inlet is provided in the water inlet area at the bottom of the diversion trough and near one of the long side walls of the diversion trough, the water inlet is connected to the discharge end of the lifting pump, and a cover plate is provided above the water inlet, which is arranged at intervals and horizontally, and the cover plate is fixed to the long side wall of the diversion trough.

[0024] Furthermore, a water inlet is provided in the water inlet area at the bottom of the diversion trough and near one of the long side walls of the diversion trough, the water inlet is connected to the discharge end of the lifting pump, and a cover plate is provided above the water inlet, which is arranged at intervals and horizontally, and the cover plate is fixed to the long side wall of the diversion trough.

[0025] Furthermore, the water distribution mechanism includes a water inlet trough, a transition trough, and a plurality of water distribution troughs arranged horizontally and side by side between the water inlet trough and the transition trough.

[0026] The water inlet trough is divided into a water flow area and a water diversion area according to the overflow direction of the water body. The water flow area is connected to a sewage pipe, the sewage pipe is connected to a lifting pump, and the water diversion area is connected to multiple water distribution troughs.

[0027] Furthermore, the water inlet trough is divided into a water passing area and a water guiding area by a baffle. The water passing area is provided with water through holes that are interconnected at the bottom of the water inlet trough. A cover plate is provided at a position opposite to the water through hole. The cover plate and the inner wall of the water inlet trough constitute a water inlet buffer space, and the water inlet buffer space is provided with a water outlet gap facing the baffle.

[0028] Furthermore, the baffle is arranged between two side walls of the water inlet trough, and the height of the baffle is smaller than the height of the two side walls of the water inlet trough.

[0029] Furthermore, the length direction of the water distribution trough is arranged perpendicular to the length direction of the water inlet trough, and a plurality of water distribution troughs are arranged at intervals along the length direction of the water inlet trough and are connected to the water inlet trough;

[0030] A plurality of water leakage gaps are arranged on both side walls of the water distribution trough, and the plurality of water leakage gaps are evenly distributed along the length direction of the water distribution trough, and the water leakage gaps are in a V-shaped structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an appearance diagram of the present invention;

[0032] Figure 2 for Figure 1 The schematic diagram of the structure without the perforated plate, top plate and intercepting plate;

[0033] Figure 3 for Figure 2 A schematic diagram of the structure in which the bracket and the filler frame are removed;

[0034] Figure 4 It is a schematic diagram of the coordination of the water distribution mechanism, water collection tank, sedimentation filter tank and diversion and reflux mechanism of the present invention;

[0035] Figure 5 This is a schematic diagram of the installation position of the diverter tank, the lifting pump and the sedimentation filter tank of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the sedimentation filter tank and the diversion tank installed in coordination with each other in the present invention;

[0037] Figure 7 for Figure 6 A schematic diagram of the structure without the front panel;

[0038] Figure 8 It is a structural schematic diagram of the connection between the diverter trough and two water outlet pipes of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the diverter trough of the present invention from another angle;

[0040] Fig.10 A top view of the diverter trough of the present invention;

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

[0042] Fig.12 for Fig.10 Sectional view along the midline BB;

[0043] Fig.13 It is a structural schematic diagram of the water distribution mechanism of the present invention;

[0044] Fig.14 for Fig.13 Enlarged view of part A in the middle;

[0045] Fig.15 It is a structural schematic diagram of the water inlet tank of the present invention;

[0046] Fig.16 It is a structural cross-sectional view of the water inlet tank of the present invention;

[0047] Fig.17 for Fig.16 Enlarged view of middle part B;

[0048] Fig.18 for Fig.16 Enlarged view of part C in the middle.

[0049] In the figure: enclosure 11, interception plate 13, sludge area 20, sludge pipe 210, diversion trough 3, water inlet area 31, cover plate 32, drainage area 33, return area 34, overflow plate 35, overflow notch 36, diversion notch 37, split plate 38, water diversion area 39, return notch 310, adjustment plate 311, movable plate 312, drainage port 313, water outlet 314, water inlet 315, folding edge 321, water outlet pipe 4, sedimentation area 7, central tube 71, overflow trough 73, partition plate 74, water guide pipe 8, water inlet trough 2, sewage hole 21, baffle 22 , cover plate 23, water outlet gap 24, water outlet 25, secondary buffer area 26, water guide area 27, through hole 28, water inlet buffer space 29, water distribution trough 3, leakage gap 31, transition trough 40, mud outlet pipe 401, bracket 101, perforated plate 102, top plate 103, water collection tank 104, sedimentation filter tank 105, water outlet area 106, lifting pump 107, support plate 108, return pipe 109, connecting rod 110, support frame 111, sewage pipe 112, water inlet pipe 113, filling frame 114, drainage pipe 115, sewage pipe 201. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0051] like Figure 1As shown, a sewage treatment device can be pre-buried underground for use, or designed as an integrated sewage treatment machine structure and installed at a preset location for use. The sewage treatment device provided in the present invention adopts an integrated machine structure, including a housing and a leaching tower and a sedimentation filter tank 105 provided in the housing. Figure 1 , 2 As shown, the shell includes a bracket 101 and a top plate 103, a bottom plate and a plurality of perforated plates 102 arranged on the bracket 101. The main purpose of the shell is to reduce the impact of the outside world on the internal components of the shell, and also to facilitate the installation of other components in the shell. Therefore, in order to enable the shell to achieve this purpose and the principle of saving materials, the present invention arranges the shell into a rectangular shell structure surrounded by the bracket 101 and a plurality of plates.

[0052] The components in the housing are mainly the filter tower and the sedimentation filter tank 105. Figure 2 , 3 As shown in , 4, the leaching tower includes a water distribution mechanism, a packing layer and a water collecting tank 104 from top to bottom. The water collecting tank 104 is a rectangular cavity structure with an opening on the top formed by a plurality of mounting plates. A plurality of support plates 108 are arranged in the water collecting tank 104. The plurality of support plates 108 and the mounting plates can divide the water collecting tank 104 into a plurality of interconnected chambers. Each chamber can be provided with a sewage pipe 112 for use in equipment flushing or maintenance processes. A control valve is provided on the sewage pipe 112. A support frame 111 is fixed above the support plate 108. The support frame 111 is similar to a multi-layer structure of a storage rack. A plurality of packing frames 114 are placed in each layer of the support frame 111. The structure and placement layout of the plurality of packing frames 114 in each layer are the same. The packing frame 114 is used to load the packing. The packing can adopt the 3-4 cm thick material used in the prior art. 3 The hydrophilic polyurethane sponge blocks are formed to form the anaerobic state required for the nitrifying bacteria reaction, and the total nitrogen is removed efficiently. Of course, other microorganisms can also be attached to the fillers in the filler frame 114 to carry out biochemical reactions on the sewage, so as to remove other pollutants in the water. A plurality of filler frames 114 provided with fillers constitute a filler layer. A water distribution mechanism is provided above the filler layer, and the water distribution mechanism is communicated with the external sewage to be treated, and is used to distribute the sewage to be treated, so that the sewage and the fillers in the filler layer can contact and react smoothly, so as to remove nitrogen compounds in the sewage.

[0053] The external sewage enters the water distribution mechanism from the sewage pipe 201, and the sewage discharged from the water distribution mechanism passes through the packing layer and falls into the water collection tank 104, and then enters the sedimentation filter tank 105 for further treatment. However, when the external sewage passes through the packing layer, some of the sewage cannot effectively contact with the packing in the packing layer for treatment, such as Figure 2-4As shown, for this purpose, the present invention also sets a diversion reflux mechanism between the water collection tank 104 and the sedimentation filter tank 105. The diversion reflux mechanism includes a lift pump 107 set 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 a reflux pipe 109. The diversion trough 3 is used to limit the water flow entering the sedimentation filter tank 105. Figure 2 , 4 As shown, the water collection tank 104 is divided into a leaching area and a water outlet area 106, the packing layer is arranged above the leaching area, the sewage passing through the leaching area overflows to the water outlet area 106, the lifting pump 107 is arranged in the water outlet area 106, the discharge end of the lifting pump 107 is connected to a three-way pipe, one branch of the three-way pipe is connected to the return pipe 109, and the other branch of the three-way pipe is connected to the diversion trough 3 through the water inlet pipe 113, and the lifting pump 107 drives the sewage in the water outlet area 106 into the sedimentation area 7 and the water distribution mechanism. The water in the water collection tank 104 can pass through the packing layer for many times and effectively contact the microorganisms in the packing layer, ensuring the treatment effect of the entire water collection tank 104 on the sewage, and the lifting pump 107 controls the water flow entering the sedimentation area 7, ensuring that the water inflow into the sedimentation filter 105 is basically consistent within a unit time, and ensuring the effective operation of the sedimentation filter 105.

[0054] In order to avoid the failure of the lift pump 107 during use, resulting in an excessive amount of sewage entering the sedimentation filter 105, the present invention is provided with a diversion trough 3. Specifically, Figure 8-12As shown, the diversion trough 3 is divided into an inlet area 31, a diversion area 39, a drainage area 33 and a reflow area 34. The inlet area 31 is connected to the discharge end of the lift pump 107 through the inlet pipe 113, the drainage area 33 is connected to the sedimentation filter 105, and the reflow area 34 is connected to the collection tank 104 through the drainage pipe 115; the inlet area 31 is adjacent to the diversion area 39 and guides water to the diversion area 39 through the overflow notch 36, the diversion area 39 is adjacent to the drainage area 33 and the reflow area 34, and overflows and guides water to the drainage area 33 through the diversion notch 37 and overflows and guides water to the reflow area 34 through the reflow notch 310, and the diversion notch 37 is in a V-shaped structure, the reflow notch 310 is in a rectangular structure, and the bottom position of the diversion notch 37 is lower than the bottom position of the reflow notch 310. When in use, the lifting pump 107 works to feed the sewage in the water collection tank 104 from the water inlet area 31 of the diversion trough 3. The sewage fills the water inlet area 31 and flows along the overflow gap 36 into the water diversion area 39. Since the water diversion area 39 is provided with a V-shaped diversion gap 37 and a rectangular structure of the return notch 310, when the water inflow is stable, the sewage in the water diversion area 39 overflows along the diversion gap 37 to the drainage area 33 and finally enters the sedimentation filter tank 105; when the water inflow of the water inlet area 31 increases (the lifting pump 10 7 fault), the amount of water entering the water diversion area 39 increases. When the water amount increases to the position of the return groove 310, since the opening method of the return groove 310 is conducive to the circulation of sewage, the increased sewage in the water diversion area 39 enters the return area 34 at this time, and falls back into the collection tank 104 through the drain pipe 115, reducing the probability of abnormal operation of the sedimentation filter 105 due to excessive water inflow per unit time, thereby ensuring that the diversion groove 3 can limit the water flow entering the sedimentation filter 105.

[0055] The sedimentation filter 105 provided in the present invention adopts the structure of the vertical flow sedimentation filter 105 in the prior art. However, in order to ensure that the sedimentation filter 105 does not stop during the maintenance process and to make the structure of the sedimentation filter 105 more compatible with the structure of the shell, the sedimentation filter 105 can also provide the sewage treatment capacity per unit time. Figure 5 , 6As shown in Figures 7 and 8, the sedimentation filter 105 provided in the present invention includes a tank body, which is surrounded by a plurality of panels 11. The panels 11 are one of the components of the overall shell, and the panels 11 are fixed to the bracket 101. A partition 74 is provided in the tank, and the partition 74 divides the tank body into two sedimentation areas 7. Each sedimentation area 7 has the function of a vertical flow sedimentation filter 105. Specifically, each sedimentation area 7 is a through-cavity structure with an opening at the upper end, a sludge area 20 with a constricted structure is provided at the lower end of the sedimentation area 7, and a central tube 71 for setting the center line is provided in the sedimentation area 7. The through-cavity structure of the sedimentation area 7 can be cylindrical or rectangular. The sedimentation area 7 provided in the present invention is a rectangular cavity structure with an opening at the upper end, and the cross-section of the side wall of the sedimentation area 7 is a square frame structure. The sedimentation filter 105 with this structure is more conducive to processing and production, and is more convenient to install. A plurality of overflow grooves 73 are provided in the middle and upper part of the sedimentation area 7. The plurality of overflow grooves 73 are arranged in close contact with the inner wall of the sedimentation area 7 and are interconnected to form an annular overflow channel. The two overflow channels are interconnected and connected to the water guide pipe 8. A mud discharge pipe 210 with a valve is provided at the bottom of the sludge area 20. In order to prevent people or small animals from falling from the top of the sedimentation area 7 into the sedimentation filter 105 due to accidents during use, a grid-shaped interception plate 13 is provided above the sedimentation filter 105.

[0056] When the sedimentation area 7 is in use, external sewage is introduced from the central tube 71 and evenly dispersed in the sedimentation area 7 along the central tube 71. The sludge in the sewage sinks to the sludge area 20 and gathers, and the stratified sewage floats up, thereby realizing the sedimentation treatment of the sludge in the sewage; the stratified sewage overflows from the overflow trough 73, and finally flows out from the water 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 areas 7, each sedimentation area 7 needs to be connected to the diversion trough 3 and take in water through the diversion trough 3. For this reason, the number of drainage areas 33 arranged in the diversion trough 3 of the present invention is two. The two drainage areas 33 are both arranged adjacent to the water diversion area 39 and both guide water through the diversion notch 37. The two drainage areas 33 are respectively connected to the two sedimentation areas 7 through the outlet pipe 4.

[0058] In order to make the diverter trough 3 evenly feed water into the two sedimentation areas 7, and to further define the layout relationship of the water inlet area 31, the water diversion area 39, the two drainage areas 33, and the reflow area 34 in the diverter trough 3, as shown in FIG. Figure 8-12As shown, the diverter trough 3 is a rectangular cavity structure with an opening at the upper end, and two splitting plates 38 are provided in the diverter trough 3, which are perpendicular to the bottom of the trough and parallel to the short side walls thereof. One side of the splitting plate 38 is fixed to a long side wall of the diverter trough 3, and the other side of the splitting plate 38 is fixed to a movable plate 312 vertically provided in the diverter trough 3. The movable plate 312 is provided close to the other long side wall of the diverter trough 3 and is fixed to the two short side walls of the diverter trough 3, wherein the two splitting plates 38 are arranged at intervals and provided with an overflow plate 35. A long side wall of the diverter trough 3, two split plates 38 and an overflow plate 35 constitute an inlet area 31 of a rectangular cavity structure, and an overflow notch 36 is provided at the upper end of the overflow plate 35; the overflow plate 35, the two split plates 38 and the movable plate 312 constitute a water diversion area 39 of a rectangular cavity structure, and two diversion notches 37 are respectively provided at the upper ends of the two split plates 38 in the water diversion area 39; any split plate 38, the fixed plate, a long side wall of the diverter trough 3 and the short side wall adjacent to the long side wall constitute a drainage area 33 of a rectangular cavity structure, and the water inlet end of the outlet pipe 4 is arranged at the bottom of the diverter trough 3 in the drainage area 33 (that is, the water outlet 314 provided at the bottom of the diverter trough 3); the movable plate 312, the other long side wall of the diverter trough 3 and the two short side walls of the diverter trough 3 constitute a reflux area 34 of a rectangular cavity structure, and a drainage outlet 313 is provided at the bottom of the diverter trough 3 in the reflux area 34, and the drainage outlet 313 is connected to the reflux pipe 109.

[0059] like Figure 8-12 As shown, the entire diversion trough 3 can be divided into a water inlet area 31, a water diversion area 39 and two drainage areas 33 by means of the split plate 38, the movable plate 312 and the overflow plate 35 at specific positions, so as to achieve the above-mentioned purpose of diverting the inlet water and ensure that the entire diversion trough 3 can evenly inlet the two sedimentation areas 7; the reflux area 34 can realize the control of the water flow in the water diversion area 39, and a reflux notch 310 is provided on the movable plate 312 between the two split plates 38, and the reflux notch 310 is provided with an adjustment plate 311 that can be adjusted up and down. The section plate can slide with a damping screw or with the partition plate 74, so that the adjustment plate 311 can limit the depth of the reflux notch 310, which is used to control the water flow entering the water diversion area 39 to be diverted from the reflux notch 310 or from the corresponding diversion notch 37 first, so as to realize the control of the water flow in the water diversion area 39. At the same time, when the flow rate introduced into the water diversion area 39 from the water inlet area 31 is too large, the water in the water diversion area 39 can also overflow from the reflux groove 310 and flow back from the drainage pipe 115 set in the reflux area 34, so as to avoid the large water flow in the water diversion area 39 affecting the use of the sedimentation area 7.

[0060] When the lifting pump 107 feeds water into the water inlet area 31, in order to prevent the water flow pressure from being too high and impacting the water inlet area 31, the use effect of the entire diversion trough 3 is limited. Figure 8-12As shown, the present invention is provided with a water inlet 315 at the bottom of the diverter trough 3 in the water inlet area 31 and close to one of the long side walls of the diverter trough 3, and a cover plate 32 arranged at intervals and arranged horizontally is provided above the water inlet 315, and the cover plate 32 is fixed to the long side wall of the diverter trough 3. The cover plate 32 is a rectangular plate-shaped structure, and any side of the cover plate 32 is fixed to a long side wall of the diverter trough 3. The cover plate 32 is provided with a folded edge 321 extending downward on both sides adjacent to the side of the cover plate 32. The setting of the two folded edges 321 can make the water flow impacting the cover plate 32 flow back downward along the folded edge 321, further reducing the water flow speed, and at the same time, after the entire diverter trough 3 runs smoothly, it can reduce the impact on the water flow in the diverter trough 3.

[0061] On the basis of the existing leaching tower, the present invention is provided with a diversion and reflux mechanism. The lifting pump 107 can form a passage with the water distribution mechanism through the pipeline, so that the water in the water collection tank 104 can pass through the packing layer for multiple times and effectively contact the microorganisms in the packing layer, thereby ensuring the sewage treatment effect of the entire water collection tank 104; and the water inflow into the sedimentation filter 105 is doubly controlled by the lifting pump 107 and the diversion trough 3. When the flow rate of the external sewage to be treated is too large, the setting of the lifting pump 107 can ensure that the water inflow into the sedimentation filter 105 is basically consistent within a unit time. When the lifting pump 107 fails, the diversion trough 3 can limit the water inflow of the sedimentation filter 105, ensuring that the water inflow of the sedimentation filter 105 does not change or changes slightly within a unit time, thereby ensuring the effective operation of the sedimentation filter 105.

[0062] In the present invention, an adsorption filler layer can be arranged in the precipitation zone 7. The filler materials of the adsorption filler layer include polypropylene (PP), polyvinyl chloride (PVC) and glass fiber reinforced plastic (FRP). The adsorption filler layer can be arranged according to the use requirements.

[0063] According to the use requirements, a floating mud funnel can be set in each sedimentation area 7 to discharge the floating mud with lower density on the water surface after stratification. The floating mud funnel can be connected to the mud discharge pipe 210 through a pipeline.

[0064] The above-mentioned water distribution mechanism can adopt multiple spray pipes arranged side by side in the prior art to achieve the dispersed water intake of external sewage. However, in order to improve the sewage treatment effect, it can be achieved by increasing the residence time of sewage in the packing layer when the structure of the packing layer and the type of packing remain unchanged. Since the pretreated sewage in the prior art enters the water distribution mechanism by pumping and is fed from above the packing layer in the form of jet, the water flow has an initial velocity to enter the packing layer, so that the contact time and contact probability between the packing layer and the sewage are relatively low. For this reason, the present invention improves the structure of the existing water distribution mechanism to ensure that the water flow has basically no initial velocity when it leaves the water distribution mechanism, thereby increasing the residence time of sewage entering the packing layer.

[0065] Specifically, Figure 13-18 As shown, the water distribution mechanism includes a horizontally arranged water inlet trough 2 and a plurality of water distribution troughs 3 which are connected to the water inlet trough 2 and are all horizontally arranged; the water inlet trough 2 is divided into a water passing area and a water guiding area 27 by a baffle 22, and the plurality of water distribution troughs 3 are connected to the water guiding area 27, and a water through hole 25 which is connected to each other is provided at the bottom of the water inlet trough 2 in the water passing area, and a cover plate 23 is provided above the water through hole 25, and the cover plate 23 is provided at one end of the water inlet trough 2 and forms a water inlet buffer space 29 with the inner wall of the water inlet trough 2, and the water inlet buffer space 29 is provided with a water outlet gap 24 which is opposite to the baffle 22. The water inlet pipe 113 and the water distribution trough 3 are both strip-shaped trough structures. The water inlet trough 2 is horizontally arranged above the support frame 111 and fixed to the support frame 111. The length direction of the water distribution trough 3 is arranged perpendicular to the length direction of the water inlet trough 2, and multiple water distribution troughs 3 are arranged at intervals along the length direction of the water inlet trough 2 and are respectively connected to the through holes 28 opened on the side walls of the water inlet trough 2. At least one connecting rod 110 is provided under the multiple water distribution troughs 3, 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 3 is horizontal. After the water distribution trough 3 is horizontal, the connecting rod 110 used to support the water distribution trough 3 can be fixed to the bracket 101 at this position by bolts. In order to ensure that the connecting rod 110 effectively supports and level the water distribution trough 3, 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 Fig.13 , 14 As shown, in order to facilitate the overflow of sewage entering the water distribution trough 3 into the packing layer, multiple leakage gaps 31 are provided on both side walls of the water distribution trough 3, and the multiple leakage gaps 31 are evenly distributed along the length direction of the water distribution trough 3, and the leakage gaps 31 are V-shaped. When the sewage from the water inlet trough 2 enters the multiple water distribution troughs 3, in order to allow the water in the water distribution trough 3 to overflow, in theory, the other end of the water distribution trough 3 needs to be sealed, so that the sewage can accumulate in the water distribution trough 3 and then overflow from the multiple leakage gaps 31. In order to make the overflow water distribution effect of the multiple water distribution troughs 3 more uniform, the water distribution mechanism of the present invention includes a transition trough 40 parallel to the water inlet trough 2 and arranged at intervals, and the multiple water distribution troughs 3 are arranged between the water inlet trough 2 and the transition trough 40, and the multiple water distribution troughs 3 are all connected to the transition trough 40. The transition trough 40 is fixed above the support frame 111. When used for the first time, increase the water intake to ensure that the sewage can enter the transition pipe from the water distribution tank 3, and then gradually adjust the flow rate so that the sewage can be distributed smoothly in the entire water distribution mechanism.

[0067] The present invention can improve the sewage treatment effect according to the principle that: the external sewage to be treated is introduced into the water inlet trough 2 by pumping. Since the cover plate 23 is arranged relative to the water inlet 25, the water flow entering from the water inlet 25 will impact on the cover plate 23 to decelerate once. When the water flow fills the water inlet buffer space 29, it will overflow from the water outlet gap 24. Since the volume of the buffer space is larger than the volume of the water outlet gap 24, theoretically, the water discharged from the water outlet gap 24 still has a certain water outlet speed, and the water flow discharged from the water outlet gap 24 will be blocked by the baffle plate 22, and the water flow speed will be slowed down by contact, so as to achieve the purpose of secondary deceleration. When the gap between the cover plate 23 and the baffle plate 22 is full of water flow, the water will overflow from the baffle plate 22 to the water guide area 27, and then enter the multiple water distribution troughs 3 for water distribution. The sewage overflowing from the side wall of the water distribution trough 3 enters the filler layer below, contacts and reacts with the microorganisms in the filler layer, and the sewage that completes the reaction enters the collection tank 104 for retention or enters the next sewage treatment process.

[0068] like Fig.13 , 15 As shown in Figures 16 and 17, the baffle 22 is arranged between the two side walls of the water inlet trough 2. The baffle 22 can be arranged vertically in the length direction of the water inlet trough 2, and can also be arranged between the two side walls of the water inlet trough 2 along the inclined direction. The baffle 22 and the water outlet gap 24 are arranged at intervals 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, and the decelerated water flow overflows from the baffle 22 to the water guide area 27. For this reason, the height of the baffle 22 of the present invention is less than the height of the two side walls of the water inlet trough 2.

[0069] like Fig.13 , 16 As shown in Figures 18, the water inlet trough 2 and the transition trough 40 are used to continuously introduce pre-treated sewage, which may contain sludge or other impurities. Since the water distribution mechanism has a deceleration effect on the incoming water, the water flow velocity entering the water inlet trough 2 and the transition trough 40 with the water flow is relatively small. Therefore, the sludge or other impurities mixed in the sewage are easily settled at the bottom of the water inlet trough 2 and the transition trough 40. For this reason, the water inlet trough 2 and the transition trough 40 of the present invention are both provided with mud discharge holes at the bottom, and the mud discharge holes are fixed with mud outlet pipes 401 that are arranged in communication with each other. A valve can be provided on the mud outlet pipe 401, and the opening and closing of the mud outlet pipe 401 is controlled by the valve. When cleaning is required, it can be opened. When cleaning is not required, the mud outlet pipe 401 is closed and does not affect the use of the entire water distribution mechanism.

[0070] like Figure 2As shown, since the filling frame 114 of the present invention is a rectangular frame structure, and the length direction of the filling frame 114 is arranged perpendicular to the length direction of the water distribution trough 3, in order to enable the water overflowing from the water distribution trough 3 to evenly distribute water to the fillers in the filling frame 114 in this structure, the multiple water distribution troughs 3 of the present invention are grouped in pairs, and the two water distribution troughs 3 of each group are arranged adjacent to each other and used in combination, and the two water distribution troughs 3 of each group are used in combination with a row of filling frames 114 arranged along the length direction of the water distribution trough 3.

[0071] The water inlet trough 2 provided in the present invention can perform secondary deceleration treatment on the introduced water flow, and can reduce the flow rate of sewage entering the multiple water distribution troughs 3. The sewage entering the water distribution troughs 3 will overflow after filling the water distribution troughs 3. The overflowing sewage basically falls into the packing layer by gravity, and will not have a large initial velocity when leaving the water distribution troughs 3. When the water distribution mechanism of the present invention is used to guide water, the sewage stays in the packing layer of the same structure for a longer time, which is more conducive to the contact reaction between the sewage and the microorganisms in the packing layer, thereby improving the sewage treatment effect.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

Claims

1. A sewage treatment device, comprising a leaching tower and a sedimentation filter tank (105) arranged in communication with each other, characterized in that: The leaching tower comprises a water distribution mechanism, a packing layer and a water collection tank (104) which are arranged in sequence from top to bottom. The water collection tank (104) is divided into a leaching area and a water outlet area according to the overflow direction of water flow. The packing layer is arranged in the leaching area. A diversion reflux mechanism is provided in the water outlet area, and the diversion reflux mechanism comprises a lifting pump (107) arranged in the water collecting tank (104) and a diversion trough (3) connected to the discharge end of the lifting pump (107). The discharge end of the lifting pump (107) is connected to the water distribution mechanism through a reflux pipe (109). The diversion trough (3) is used to limit the water flow entering the sedimentation filter tank (105).

2. A sewage treatment equipment according to claim 1, characterized in that: The diversion trough (3) is divided into a water inlet area (31), a water diversion area (39), a drainage area (33) and a reflow area (34). The water inlet area (31) is connected to the discharge end of the lifting pump (107), the drainage area (33) is connected to the sedimentation filter (105), and the recirculation area (34) is connected to the water collection tank (104); The water inlet area (31) is adjacent to the water diversion area (39) and guides water to the water diversion area (39) through the overflow notch (36); the water diversion area (39) is adjacent to the drainage area (33) and the reflow area (34); the water diversion area (39) overflows and guides water to the drainage area (33) through the diversion notch (37) and overflows and guides water to the reflow area (34) through the reflow notch (310); the diversion notch (37) is in a V-shaped structure, the reflow notch (310) is in a rectangular structure, and the bottom position of the diversion notch (37) is lower than the bottom position of the reflow notch (310).

3. A sewage treatment equipment according to claim 2, characterized in that: The sedimentation filter tank (105) comprises a tank body, wherein a partition plate (74) arranged in the tank body divides the tank body into two sedimentation areas (7), and water is uniformly introduced into the two sedimentation areas (7) through a diversion trough (3); There are two drainage areas (33), both of which are arranged adjacent to the water diversion area (39) and both guide water through the diversion gap (37). The two drainage areas (33) are connected to the two sedimentation areas (7) through the outlet pipes (4) respectively.

4. A sewage treatment equipment according to claim 3, characterized in that: The diversion trough (3) is a rectangular cavity structure with an upper opening. Two split plates (38) are arranged vertically along the bottom of the diverter trough (3) and parallel to the short side walls thereof. One side of the split plate (38) is fixed to a long side wall of the diverter trough (3), and the other side of the split plate (38) is fixed to a movable plate (312) arranged vertically in the diverter trough (3). The movable plate (312) is arranged close to the other long side wall of the diverter trough (3) and is fixed to the two short side walls of the diverter trough (3). The two split plates (38) are arranged at intervals and are provided with an overflow plate (35).

5. A sewage treatment equipment according to claim 4, characterized in that: A long side wall of the diversion trough (3), two split plates (38) and an overflow plate (35) form a water inlet area (31) of a rectangular cavity structure, and an overflow notch (36) is provided 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 water splitting area (39) of a rectangular cavity structure, and the two flow splitting notches (37) are respectively opened at the upper ends of the two split plates (38) in the water splitting area (39); The arbitrary split plate (38), the fixed plate, a long side wall of the diversion trough (3) and the short side wall adjacent to the long side wall form a drainage area (33) of a rectangular cavity structure, and the water inlet end of the water outlet pipe (4) is arranged at the bottom of the diversion trough (3) in the drainage area (33); The movable plate (312), the other long side wall of the diverter trough (3) and the two short side walls of the diverter trough (3) form a recirculation area (34) of a rectangular cavity structure. A drainage outlet (313) is provided at the bottom of the diverter trough (3) in the recirculation area (34) and is connected to a pipe to communicate with the water collection tank (104).

6. A sewage treatment equipment according to claim 5, characterized in that: A reflow notch (310) is provided on the movable plate (312) between the two split plates (38), and the reflow notch (310) is provided to cooperate with an adjustment plate (311) that can be adjusted up and down.

7. A sewage treatment equipment according to any one of claims 2 to 6, characterized in that: A water inlet (315) is provided in the water inlet area (31) at the bottom of the diverter trough (3) and close to one of the long side walls of the diverter trough (3). The water inlet (315) is communicated with the discharge end of the lift pump (107). A cover plate (32) arranged at intervals and horizontally disposed is provided above the water inlet (315). The cover plate (32) is fixed to the long side wall of the diverter trough (3).

8. A sewage treatment equipment according to claim 6, characterized in that: A water inlet (315) is provided in the water inlet area (31) at the bottom of the diverter trough (3) and close to one of the long side walls of the diverter trough (3). The water inlet (315) is communicated with the discharge end of the lift pump (107). A cover plate (32) arranged at intervals and horizontally disposed is provided above the water inlet (315). The cover plate (32) is fixed to the long side wall of the diverter trough (3).

9. A sewage treatment equipment according to any one of claims 1, 2, 3, 4, 5, 6 and 8, characterized in that: The water distribution mechanism comprises a water inlet trough (2) and a transition trough (40) which are arranged horizontally and side by side, and a plurality of water distribution troughs (3) arranged between the water inlet trough (2) and the transition trough (40). The water inlet trough (2) is divided into a water flow area and a water guide area (27) according to the overflow direction of the water body. The water flow area is connected to a sewage pipe (201), the sewage pipe (201) is in communication with a lifting pump (107), and the water guide area (27) is in communication with a plurality of water distribution troughs (3).

10. A sewage treatment equipment according to claim 9, characterized in that: The water inlet trough (2) is divided into a water flow area and a water guide area (27) by a baffle plate (22). A water flow opening (25) is provided in the water flow area at the bottom of the water inlet trough (2). A cover plate (23) is provided at a position opposite to the water flow opening (25). The cover plate (23) and the inner wall of the water inlet trough (2) form a water inlet buffer space (29). The water inlet buffer space (29) is provided with a water outlet gap (24) facing the baffle plate (22).

11. A sewage treatment equipment according to claim 9, characterized in that: The baffle plate (22) is arranged between the two side walls of the water inlet trough (2), and the height of the baffle plate (22) is less than the height of the two side walls of the water inlet trough (2).

12. A sewage treatment equipment according to claim 10 or 11, characterized in that: The length direction of the water distribution trough (3) is arranged perpendicular to the length direction of the water inlet trough (2), and a plurality of water distribution troughs (3) are arranged at intervals along the length direction of the water inlet trough (2) and are connected to the water inlet trough (2); A plurality of water leakage gaps (31) are provided on both side walls of the water distribution trough (3), and the plurality of water leakage gaps (31) are evenly distributed along the length direction of the water distribution trough (3), and the water leakage gaps (31) are in a V-shaped structure.

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