Layered discharge mechanism of municipal sewage treatment tank and discharge method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a layered discharge mechanism of a municipal sewage treatment tank and a discharge method of the layered discharge mechanism. According to the technical scheme, the device comprises a pool body and a supporting cylinder fixedly connected to the side wall of the pool body, and further comprises a layered driving part, a liquid discharging mechanism and a flow transferring pipe fitting; the layered driving part is installed in the supporting cylinder, and the flow transferring pipe fitting is installed at the input end of the liquid discharging mechanism. The layered driving part comprises a sliding block which is slidably connected into the supporting cylinder, and a drainage mechanism which extends into the pool body is mounted at the bottom end of the sliding block through a transmission part. The drainage mechanism is arranged on the inner side of the pool body, the two liquid guide grooves are distributed in the inclined part in a T shape, large-area and multi-angle layered drainage can be achieved, the liquid guide grooves are of a V-shaped structure, water is not prone to mixing when the liquid guide grooves sink in water, the layered drainage effect is remarkably improved, drainage negative pressure is dispersed, layered water in the pool body cannot be mixed, and the drainage effect is improved. And the purity of layered discharge is further ensured.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a stratified discharge mechanism for municipal wastewater treatment ponds and its discharge method. Background Technology

[0002] Municipal wastewater, also known as urban sewage, refers to wastewater generated by urban residents during daily life and industrial production. It requires treatment before discharge. Wastewater treatment involves multiple stages, with wastewater flocculation being a crucial step. This involves adding flocculants to the wastewater, causing tiny suspended particles and colloidal substances to aggregate into larger particles or flocs, facilitating subsequent sedimentation and filtration. After flocculation, wastewater typically consists of three layers: a supernatant layer (clear water with few suspended solids, suitable for recycling), a middle layer of fine flocs (containing a small amount of unsettled fine particles, requiring further filtration or re-flocculation), and a bottom flocculation layer (concentrated sludge containing a large amount of pollutants, requiring separate discharge and further treatment).

[0003] In existing wastewater treatment ponds, workers insert drain pipes into the pond to discharge wastewater at different levels, sequentially discharging the supernatant, the fine flocs in the middle layer, and the flocculated layer at the bottom. While this achieves stratified discharge, the following problems still exist: 1. Directly inserting the drain pipe creates suction at the pipe opening, easily mixing the middle layer when discharging the upper layer, and the bottom layer when discharging the middle layer, thus failing to achieve the ideal stratified discharge effect; 2. The suction force of the drain pipe is concentrated at a certain point in the pond, which also affects the purity of each layer discharged.

[0004] Therefore, this application proposes a stratified discharge mechanism for municipal wastewater treatment ponds and its discharge method. Summary of the Invention

[0005] The purpose of this application is to address the technical problems identified in the background section by proposing a stratified discharge mechanism and method for municipal wastewater treatment ponds.

[0006] The technical solution of this application: On the one hand, this application proposes a stratified discharge mechanism for a municipal sewage treatment tank, including a tank body and a support cylinder fixedly connected to its side wall, and also includes: a stratified drive component, a discharge mechanism, and a transfer pipe component; The layered drive component is installed inside the support cylinder, the drainage mechanism is connected to the layered drive component, and the diversion pipe is installed at the input end of the drainage mechanism. The layered drive component includes a slider that is slidably connected inside the support cylinder, and the bottom end of the slider is equipped with a flow-guiding mechanism that extends into the pool body via a transmission component. The diversion mechanism includes two liquid diversion tanks arranged in a "T" shape. Both liquid diversion tanks are "V" shaped with their tips pointing downwards. Negative pressure guides are installed in both liquid diversion tanks. The diversion pipe is connected to several negative pressure guides. The sewage is diverted in layers through the diversion mechanism and the negative pressure guides.

[0007] Preferably, both sides of the support cylinder are provided with guide grooves, which are parallel to the pool body, and the two ends of the slider extend into the two guide grooves respectively. The layered driving component also includes an electric cylinder, which is installed on the lower inner wall of the support cylinder, and the telescopic end of the electric cylinder is fixedly connected to the slider. The transmission component includes a convex plate and a U-shaped plate. The convex plate is installed at the bottom end of the slider and its end extends to the top of the pool body. The bottom end of the convex plate is fixedly connected to the U-shaped plate.

[0008] Preferably, both liquid inlet channels are fixedly connected to the bottom end of the U-shaped plate, and several diversion channels are provided on both side walls of the two liquid inlet channels, with the diversion channels extending to the inner wall of the bottom end of the liquid inlet channel.

[0009] Preferably, the negative pressure guide includes a mounting plate and a negative pressure cover. The negative pressure cover is fixedly connected to the lower end of the mounting plate. The negative pressure cover is conical. The mounting plate is fixedly connected to the upper end of the liquid inlet groove. The bottom of the negative pressure cover is open, and the bottom end of the negative pressure cover maintains a distance from the inner wall of the bottom end of the liquid inlet groove. The drainage mechanism includes a bent tube that passes through the slider; The transfer pipe fitting includes a transfer main pipe, a transfer branch pipe 1, and a transfer branch pipe 2. The transfer main pipe is fixedly connected to the input end of the bend pipe. The transfer branch pipe 1 and the transfer branch pipe 2 are connected to the transfer main pipe. The transfer branch pipe 1 and the transfer branch pipe 2 are respectively connected to the negative pressure hoods in the two liquid inlet tanks.

[0010] Preferably, the drainage mechanism further includes a water pump, the input end and output end of which are respectively fixedly connected to a pump input pipe and a pump output pipe, and the pump input pipe and the bend are connected by a flexible hose; The output end of the pump output pipe is connected to a shunt pipe.

[0011] Preferably, a flow guide channel is provided in the middle of the bottom of the pool body, and both sides of the flow guide channel are set as inclined sections. A sludge discharge pipe located on one side of the flow guide channel is connected to the bottom of the pool body, and the sludge discharge pipe is connected to an external sludge discharge pump.

[0012] Preferably, a reagent box is installed on the upper side wall of the pool body via a support frame, and a drop pipe is connected to the bottom of the reagent box. The output end of the drop pipe is located above one of the liquid inlet tanks, and a valve is provided on the drop pipe.

[0013] Preferably, the connection between the two liquid inlet tanks is connected by a connecting sleeve, so that the interiors of the two liquid inlet tanks are in a through state.

[0014] Preferably, the diversion fitting includes a main diversion pipe fixedly connected to the output end of the pump output pipe, and branch pipe one and branch pipe two are respectively connected to the main diversion pipe; The branch pipe 1 and the branch pipe 2 are respectively equipped with valve 1 and valve 2.

[0015] On the other hand, this application proposes a method for stratified discharge of municipal wastewater from a treatment pond, comprising the following steps: Step 1: After the sewage in the tank flocculates and stratifies, the layer drive component drives the transmission component to move slowly downward, thereby causing the diversion mechanism and the negative pressure guide component to be inserted into the upper liquid simultaneously. Step 2: When the drainage mechanism and the negative pressure guide are inserted into the upper liquid, the upper liquid will enter the drainage tank through the upper ports of the two drainage tanks and several diversion tanks. The drainage is quiet and avoids mixing with the middle liquid. Step 3: Start the draining mechanism. The liquid in the two liquid inlet tanks is transported into the transfer pipe through the negative pressure guide, and finally output through the draining mechanism until the upper liquid is drained. Step 4: Using the same method as Steps 1-3, insert the drainage mechanism and negative pressure guide into the middle layer of liquid to drain the middle layer of liquid; Step 5: Start the external sludge pump to discharge the sludge from the bottom layer through the sludge discharge pipe.

[0016] Compared with the prior art, this application has the following beneficial technical effects: This application sets up a diversion mechanism on the inner side of the pool body and controls the lifting and lowering of the transmission component through a layered drive component, so that the diversion mechanism can slowly sink into the inner side of the pool body. The two liquid diversion channels are distributed in a "T" shape in the inclined part, which can realize large-area, multi-angle layered diversion. The "V"-shaped structure of the liquid diversion channel makes it less likely to cause water mixing when sinking in water, which significantly improves the effect of layered discharge.

[0017] By installing negative pressure guide components in two liquid inlet tanks, with the opening of the negative pressure hood facing downwards and the transfer pipe connected to the negative pressure hood, the water introduced into the liquid inlet tank is sucked away during stratified drainage, effectively avoiding the negative pressure mixing of water that has already stratified in the tank. Furthermore, the two liquid inlet tanks have a large distribution area and several diversion channels on their side walls, which disperses the negative pressure of the drainage and prevents the mixing of the stratified water in the tank, further ensuring the purity of the stratified discharge.

[0018] In this application, the two liquid inlet tanks are connected by a connecting tube. Flocculant can also be uniformly added to the sewage in the tank through a diversion mechanism. When adding flocculant, the diversion mechanism is in its highest state, located above the highest water level. When valve three is opened, the flocculant is put into one of the liquid inlet tanks through a vertical pipe, flows into the other liquid inlet tank through the connecting tube, and then flows out through several diversion channels, dispersing into the sewage in the tank. Compared with the traditional addition method, the flocculant can be mixed with the sewage more evenly, improving the efficiency of sewage flocculation and stratification. Attached Figure Description

[0019] Figure 1 This is a three-dimensional diagram of a stratified discharge mechanism for municipal wastewater treatment ponds; Figure 2 yes Figure 1 A sectional view; Figure 3 It is in this application Figure 1 Another perspective structural diagram; Figure 4 This is a schematic diagram of the liquid inlet tank in this application; Figure 5 This is a cross-sectional view of one of the liquid inlet channels in this application; Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the diversion pipe fitting in this application.

[0020] Reference numerals: 1. Pool body; 2. Inclined section; 3. Guide channel; 4. Support cylinder; 5. Guide channel; 6. Layer drive component; 61. Slider; 62. Electric cylinder; 7. Drainage mechanism; 71. Bend; 72. Hose; 73. Pump inlet pipe; 74. Pump outlet pipe; 75. Diversion pipe fitting; 751. Diversion main pipe; 752. Branch pipe one; 753. Valve one; 754. Branch pipe two; 755. Valve two; 7 6. Water pump; 8. Transmission components; 81. Convex plate; 82. U-shaped plate; 9. Transfer pipe fittings; 91. Transfer main pipe; 92. Transfer branch pipe one; 93. Transfer branch pipe two; 10. Sludge discharge pipe; 11. Drainage mechanism; 111. Liquid inlet tank; 112. Diversion tank; 12. Negative pressure guide component; 121. Mounting plate; 122. Negative pressure cover; 13. Connecting cylinder; 14. Reagent box; 15. Vertical flow pipe; 16. Valve three. Detailed Implementation

[0021] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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 orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] like Figures 1-7As shown, this application proposes a stratified discharge mechanism for a municipal sewage treatment tank, comprising a tank body 1 and a support cylinder 4 fixedly connected to its side wall. Strips are fixedly connected to both sides of the support cylinder 4, and the two strips are fixed to the tank body 1 by bolts. Side plates are detachably connected to the side wall of the support cylinder 4, and the side plates are fixed to the support cylinder 4 by screws, facilitating subsequent maintenance of the equipment inside the support cylinder 4. A guide channel 3 is provided in the middle of the bottom end of the tank body 1, and inclined sections 2 are provided on both sides of the guide channel 3. A sludge discharge pipe 10 is connected to the bottom end of the tank body 1, located on one side of the guide channel 3. The sludge discharge pipe 10 is connected to an external sludge discharge pump. When discharging the sediment at the bottom, as the amount of sediment gradually decreases, the sediment is concentrated in the guide channel 3 under the inclined surface guidance of the two inclined sections 2, and can be smoothly discharged through the sludge discharge pipe 10. It also includes a layered drive component 6, a drainage mechanism 7, and a transfer pipe 9. The layered drive component 6 is installed inside the support cylinder 4, the drainage mechanism 7 is connected to the layered drive component 6, and the transfer pipe 9 is installed at the input end of the drainage mechanism 7. The layered drive component 6 includes a slider 61 slidably connected inside the support cylinder 4. Guide grooves 5 are provided on both side walls of the support cylinder 4. The guide grooves 5 are parallel to the pool body 1, and both ends of the slider 61 extend into the two guide grooves 5 respectively. The layered drive component 6 also includes an electric cylinder 62, which is installed on the lower inner wall of the support cylinder 4. The telescopic end of the electric cylinder 62 is fixedly connected to the slider 61, and the electric cylinder 62 drives the slider 61 to slowly rise and fall. The bottom end of the slider 61 is equipped with a flow diversion mechanism 11 extending into the pool body 1 via a transmission component 8. The transmission component 8 includes a convex plate 81 and a U-shaped plate 82. The convex plate 81 is installed at the bottom end of the slider 61 and its end extends above the pool body 1. The bottom end of the convex plate 81 is fixedly connected to the U-shaped plate 82. In this application, the flow diversion mechanism 11 is used to divert and guide the flocculated and stratified water in the pool body 1.

[0027] Specifically, the diversion mechanism 11 includes two liquid diversion channels 111 arranged in a "T" shape. Both liquid diversion channels 111 are "V" shaped, with their tips pointing downwards. When the two liquid diversion channels 111 are inserted into the water, the resistance between them and the water is effectively reduced, thus preventing the mixing and stratification of the water. Both liquid diversion channels 111 are fixedly connected to the bottom end of the U-shaped plate 82. Several diversion channels 112 are provided on both side walls of the two liquid diversion channels 111, extending to the inner wall of the bottom end of the liquid diversion channel 111. Negative pressure guide components 12 are provided in both liquid diversion channels 111. The diversion pipe 9 is connected to several negative pressure guide components 12. Through the diversion mechanism 11 and the negative pressure guide components 12, the sewage is diverted in layers. During layered discharge, the concentrated negative pressure during drainage is significantly reduced. The negative pressure of the layered drainage is dispersed at different locations in the tank 1 by the diversion mechanism 11. The negative pressure of the drain pipe 9 acts on the negative pressure guide 12, while the negative pressure of the negative pressure guide 12 absorbs water into the liquid inlet 111. The liquid inlet 111 receives water through several diversion channels 112, which disperses the force of the introduced water and avoids excessive negative pressure suction at a certain point, which would cause the stratified water to mix.

[0028] Furthermore, the negative pressure guide component 12 includes a mounting plate 121 and a negative pressure cover 122. The negative pressure cover 122 is fixedly connected to the lower end of the mounting plate 121. The negative pressure cover 122 is conical. The mounting plate 121 is fixedly connected to the upper end of the liquid inlet trough 111. The bottom of the negative pressure cover 122 is open, and the bottom end of the negative pressure cover 122 maintains a distance from the inner wall of the bottom end of the liquid inlet trough 111, so that the interior of the liquid inlet trough 111 is horizontally connected. When the liquid inlet trough 111 is filled with water, the negative pressure cover 122 can also be filled with water. The drainage mechanism 7 includes a bent pipe 71 that passes through a slider 61. Changes in the height of the slider 61 synchronously change the height of the bent pipe 71 and the transmission component 8. The diversion pipe component 9 includes a main diversion pipe 91, a first diversion branch pipe 92, and a second diversion branch pipe 93. The main diversion pipe 91 is fixedly connected to the input end of the bent pipe 71. The first and second diversion branch pipes 92 and 93 are connected to the main diversion pipe 91. The first and second diversion branch pipes 92 and 93 are respectively connected to negative pressure covers 122 in two liquid inlet tanks 111. Two negative pressure guides 12 are provided in the liquid inlet tank 111 parallel to the support cylinder 4, and one negative pressure guide 12 is provided in the diversion mechanism 11 perpendicular to the support cylinder 4. Two first diversion branch pipes 92 are provided, each connected to a corresponding negative pressure cover 122. The drainage mechanism 7 also includes a water pump 76, which is mounted on the side wall of the pool body 1 via a motor mount. The pump 76 has a pump input pipe 73 and a pump output pipe 74 fixedly connected to its input and output ends, respectively. The pump input pipe 73 is connected to the bend 71 via a flexible hose 72. The output end of the pump output pipe 74 is connected to a diversion fitting 75, which can divert the drainage water. The diversion fitting 75 includes a main diversion pipe 751 fixedly connected to the output end of the pump output pipe 74. The main diversion pipe 751 is connected to a branch pipe 752 and a branch pipe 754. The branch pipe 752 and the branch pipe 754 are respectively equipped with a valve 753 and a valve 755. The branch pipe 752 is used to discharge the upper layer liquid, and the branch pipe 754 is used to discharge the middle layer liquid. When discharging the upper layer liquid, valve 755 is closed and valve 753 is open. When discharging the middle layer liquid, valve 755 is open and valve 753 is closed.

[0029] In this embodiment, a reagent box 14 is mounted on the upper side wall of the pool body 1 via a support frame. A vertical flow pipe 15 is connected to the bottom of the reagent box 14. The output end of the vertical flow pipe 15 is located above one of the liquid inlet troughs 111, and a valve 16 is installed on the vertical flow pipe 15. The two liquid inlet troughs 111 are connected by a connecting sleeve 13, allowing the interiors of the two liquid inlet troughs 111 to be in a continuous state. Flocculant can be evenly added to the wastewater in the pool body 1 through the drainage mechanism 11. Before the wastewater flocculates, the drainage mechanism 11 is in its highest state, located above the highest water level. First, open the cover of reagent box 14, add the prepared flocculant into reagent box 14, and then open valve 16. The flocculant is put into one of the liquid inlet tanks 111 through the vertical pipe 15, flows into another liquid inlet tank 111 through the connecting cylinder 13, and then flows out through several diversion channels 112, dispersing into the sewage in the pool 1, so that the flocculant can be mixed more evenly with the sewage, which can improve the efficiency of sewage flocculation and stratification.

[0030] The working principle of this embodiment is as follows: First, wastewater is added to tank 1, then the prepared flocculant is added to reagent tank 14. Valve 16 is opened, and the flocculant in reagent tank 14 flows through the vertical pipe 15 to one of the liquid inlet troughs 111. The flocculant flows through the connecting cylinder 13 into another liquid inlet trough 111, and then flows out through several diversion channels 112, dispersing into the wastewater in tank 1. The flocculant and wastewater are fully mixed by the external stirring mechanism. After standing for a period of time, when the wastewater in tank 1 has flocculated and stratified, the electric cylinder 62 is activated to slowly move the slider 61 downward. When the slider 61 moves downward, it drives the bent pipe 71, the convex plate 81, and the U-shaped plate 82 to move downward synchronously. This causes the diversion mechanism 11 and the negative pressure guide 12 to be inserted into the upper liquid simultaneously. Both liquid inlet troughs 111 are "V" shaped, which can significantly reduce the resistance generated by the water when slowly descending, thereby avoiding mixing of the stratified water. When the diversion mechanism 11 and the negative pressure guide 12 are inserted into the upper liquid, the upper liquid will enter the diversion tank 111 through the upper ports of the two diversion tanks 111 and several diversion tanks 112. The diversion is quiet and avoids mixing with the middle liquid. The bottom of the negative pressure cover 122 maintains a certain distance from the lower inner wall of the diversion tank 111. When the diversion tank 111 is full of water, the negative pressure cover 122 will also be filled with water. The water pump 76 is started, and the liquid in the two diversion tanks 111 is transported to the transfer branch pipe 1 92 and transfer branch pipe 2 93 through several negative pressure covers 122, and then transported to the transfer main pipe 91 through transfer branch pipe 1 92 and transfer branch pipe 2 93. Finally, it is output through the bend pipe 71, hose 72, pump inlet pipe 73, pump outlet pipe 74 and branch pipe 1 752 until the upper liquid is drained. It should be noted that when discharging the upper layer liquid, valve 2 755 is in the closed state, valve 1 753 is in the open state, and branch pipe 1 752 is connected to the external recovery tank.

[0031] After the upper layer liquid is discharged, close valve 1 (753) and open valve 2 (755) to discharge the middle layer liquid. The discharge method is basically the same as that for the upper layer liquid, except that the height of the diversion mechanism 11, the negative pressure guide component 12, and the transfer pipe component 9 is lowered by activating the electric cylinder 62. Branch pipe 2 (754) is connected to the external secondary treatment tank. When the middle layer liquid is discharged, start the external sludge pump to discharge the bottom sludge through the sludge discharge pipe 10. The output pipe of the sludge pump is connected to the external sludge treatment tank.

[0032] A method for stratified discharge of municipal wastewater from a treatment pond includes the following steps: Step 1: After the sewage in tank 1 has flocculated and separated into layers, start the electric cylinder 62 to make the slider 61 move slowly downward, and make the transmission component 8 move slowly downward, so that the diversion mechanism 11 and the negative pressure guide component 12 are inserted into the upper liquid at the same time. The two diversion tanks 111 are both "V" shaped, which can significantly reduce the resistance generated with water when descending slowly, thereby avoiding mixing of the separated water.

[0033] Step 2: When the drainage mechanism 11 and the negative pressure guide 12 are inserted into the upper liquid, the upper liquid will enter the drainage tank 111 through the upper ports of the two drainage tanks 111 and several diversion tanks 112. The drainage is quiet and avoids mixing with the middle liquid. The bottom of the negative pressure cover 122 maintains a certain distance from the lower inner wall of the drainage tank 111. When the drainage tank 111 is full of water, the negative pressure cover 122 will also be filled with water.

[0034] Step 3: Start the water pump 76. The liquid in the two liquid inlet tanks 111 is transported to the transfer pipe 9 through the negative pressure hood 122, and finally discharged through the draining mechanism 7 until the upper layer liquid is completely drained. It should be noted that when draining the upper layer liquid, valve 2 755 is closed, valve 1 753 is open, and branch pipe 1 752 is connected to the external recovery tank.

[0035] Step 4: Using the same method as Steps 1-3, insert the drainage mechanism 11 and the negative pressure guide 12 into the intermediate layer liquid to drain the intermediate layer liquid. The drainage method is the same, except that the height of the drainage mechanism 11, the negative pressure guide 12, and the transfer pipe 9 is lowered by activating the electric cylinder 62. It should be noted that when draining the intermediate layer liquid, valve 2 755 is open, valve 1 753 is closed, and branch pipe 2 754 is connected to the external secondary treatment box.

[0036] Step 5: When the middle layer liquid is drained, start the external sludge pump to discharge the bottom sludge through the sludge discharge pipe 10. The pipe at the output end of the sludge pump is connected to the external sludge treatment tank.

[0037] The above specific embodiments are merely preferred embodiments of this application. Based on the technical solutions of this application and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments. The above specific embodiments are merely explanations of this application and are not limitations on this application.

Claims

1. A stratified discharge mechanism for municipal sewage treatment ponds, comprising a pond body (1) and a support cylinder (4) fixedly connected to its side wall, characterized in that, Also includes: Layered drive component (6), drainage mechanism (7), transfer pipe component (9); The layer drive (6) is installed inside the support cylinder (4), the draining mechanism (7) is connected to the layer drive (6) in a transmission, and the transfer pipe (9) is installed at the input end of the draining mechanism (7); The layer drive (6) includes a slider (61) slidably connected in the support cylinder (4), and the bottom end of the slider (61) is equipped with a diversion mechanism (11) extending into the pool body (1) via a transmission component (8). The diversion mechanism (11) includes two liquid diversion tanks (111) arranged in a "T" shape. Both liquid diversion tanks (111) are "V" shaped, and the tips of the two liquid diversion tanks (111) face downward. Negative pressure guides (12) are provided in both liquid diversion tanks (111). The transfer pipe (9) is connected to several negative pressure guides (12). The sewage is diverted in layers through the diversion mechanism (11) and the negative pressure guides (12).

2. The municipal sewage treatment pond stratified discharge mechanism according to claim 1, characterized in that, The two side walls of the support cylinder (4) are provided with guide grooves (5), which are parallel to the pool body (1). The two ends of the slider (61) extend into the two guide grooves (5) respectively. The layer drive component (6) also includes an electric cylinder (62), which is installed on the lower inner wall of the support cylinder (4), and the telescopic end of the electric cylinder (62) is fixedly connected to the slider (61). The transmission component (8) includes a convex plate (81) and a U-shaped plate (82). The convex plate (81) is installed at the bottom end of the slider (61) and its end extends above the pool body (1). The bottom end of the convex plate (81) is fixedly connected to the U-shaped plate (82).

3. The municipal sewage treatment pond stratified discharge mechanism according to claim 2, characterized in that, Both liquid inlet tanks (111) are fixedly connected to the bottom end of the U-shaped plate (82). Several diversion channels (112) are provided on both sides of the liquid inlet tanks (111). The diversion channels (112) extend to the bottom inner wall of the liquid inlet tanks (111).

4. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 3, characterized in that, The negative pressure guide (12) includes a mounting plate (121) and a negative pressure cover (122). The negative pressure cover (122) is fixedly connected to the lower end of the mounting plate (121). The negative pressure cover (122) is conical. The mounting plate (121) is fixedly connected to the upper end of the liquid inlet tank (111). The bottom of the negative pressure cover (122) is open, and the bottom end of the negative pressure cover (122) maintains a distance from the inner wall of the bottom end of the liquid inlet tank (111). The drainage mechanism (7) includes a bent tube (71) that passes through the slider (61). The transfer pipe fitting (9) includes a transfer main pipe (91), a transfer branch pipe one (92), and a transfer branch pipe two (93). The transfer main pipe (91) is fixedly connected to the input end of the bend pipe (71). The transfer branch pipe one (92) and the transfer branch pipe two (93) are connected to the transfer main pipe (91). The transfer branch pipe one (92) and the transfer branch pipe two (93) are respectively connected to the negative pressure hoods (122) in the two liquid inlet tanks (111).

5. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 4, characterized in that, The drainage mechanism (7) also includes a water pump (76), the input end and the output end of the water pump (76) are respectively fixedly connected to a pump input pipe (73) and a pump output pipe (74), and the pump input pipe (73) and the bend pipe (71) are connected by a flexible hose (72). The output end of the pump output pipe (74) is connected to a shunt pipe fitting (75).

6. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 1, characterized in that, The bottom of the pool body (1) is provided with a guide channel (3), and both sides of the guide channel (3) are provided with inclined parts (2). The bottom of the pool body (1) is connected to a sludge discharge pipe (10) located on one side of the guide channel (3), and the sludge discharge pipe (10) is connected to an external sludge discharge pump.

7. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 1, characterized in that, A reagent box (14) is installed on the upper side wall of the pool body (1) via a support frame. A vertical pipe (15) is connected to the bottom of the reagent box (14). The output end of the vertical pipe (15) is located above one of the liquid inlet tanks (111), and a valve three (16) is provided on the vertical pipe (15).

8. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 7, characterized in that, The two liquid inlet tanks (111) are connected by a connecting tube (13) to make the interiors of the two liquid inlet tanks (111) interconnected.

9. A stratified discharge mechanism for municipal sewage treatment ponds according to claim 5, characterized in that, The branch pipe fitting (75) includes a branch main pipe (751) fixedly connected to the output end of the pump output pipe (74), and branch pipe one (752) and branch pipe two (754) are respectively connected to the branch main pipe (751). The branch pipe 1 (752) and branch pipe 2 (754) are respectively equipped with valve 1 (753) and valve 2 (755).

10. A method for stratified discharge of municipal wastewater from a municipal wastewater treatment pond, applied to the stratified discharge mechanism of a municipal wastewater treatment pond as described in claim 6, characterized in that, Includes the following steps: Step 1: After the sewage in the pool (1) flocculates and stratifies, the transmission component (8) is driven by the layer drive component (6) to move the transmission component (8) slowly downward, thereby causing the diversion mechanism (11) and the negative pressure guide component (12) to be inserted into the upper liquid simultaneously; Step 2: When the diversion mechanism (11) and the negative pressure guide (12) are inserted into the upper liquid, the upper liquid will enter the diversion tank (111) through the upper ports of the two diversion tanks (111) and several diversion tanks (112). The diversion is quiet and avoids mixing of the middle liquid. Step 3: Start the draining mechanism (7). The liquid in the two liquid inlet tanks (111) is transported to the transfer pipe (9) through the negative pressure guide (12) and finally output through the draining mechanism (7) until the upper liquid is drained. Step 4: Using the same method as Step 1-Step 3, insert the drainage mechanism (11) and the negative pressure guide (12) into the middle layer liquid and discharge the middle layer liquid; Step 5: Start the external sludge pump and discharge the bottom sludge through the sludge discharge pipe (10).

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