Multi-stage sewage treatment device and sewage treatment method thereof

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a multi-stage sewage treatment device and a sewage treatment method thereof, which comprises a trash blocking device body, the trash blocking device body comprises a blocking net, a drainage groove is formed in the blocking net, a fixed support is fixedly connected to the side surface of the blocking net, a reciprocating poking mechanism is arranged on the side surface of the trash blocking device body, a smaller impurity stuck in the drainage groove is removed through the sliding of the reciprocating moving rod in the drainage groove, the flow rate of water flow through the drainage groove is improved, the small-amplitude rotation of the reciprocating moving rod can clean the substances attached to the side wall of the drainage groove, the cleaning capacity of the reciprocating moving rod is further improved, the service life of the blocking net is prolonged, the rotation of the rotating rod can clean the gravel on the bottom plate of the fixed support and push the gravel on the fixed support into the collecting box, the effect of blocking of the blocking net caused by the accumulation of the gravel is avoided, and the work efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sewage treatment, and in particular relates to a multi-stage sewage treatment device and a sewage treatment method thereof. BACKGROUND

[0002] Multi-stage sewage treatment refers to a system that uses multiple treatment stages or steps to gradually remove various pollutants in sewage, in order to achieve higher water quality purification effect. Such a device usually includes pre-treatment, primary treatment, secondary treatment, tertiary treatment (or advanced treatment) and other different levels of treatment units.

[0003] In the prior art, the pre-treatment step of sewage treatment usually places a barrier net at the water inlet to block the influence of larger substances in the water on subsequent processes. However, the larger substances isolated by the barrier net are usually cleaned manually to avoid the impact of larger substances in the sewage on subsequent equipment.

[0004] The above scheme still has some problems in actual application. Although the existing barrier net can isolate larger substances outside the process, the smaller stones in the impurities are easily stuck in the gaps of the barrier net, which can reduce the water flow through the barrier net and thus reduce the work efficiency. In addition, the smaller stones in the impurities are stuck in the gaps of the barrier net, which requires frequent replacement of the barrier net, thereby increasing the cost of sewage treatment. In addition, cleaning the stones stuck in the gaps of the barrier net by the cleaning assembly can cause the stones to deposit at the bottom of the barrier net. When the stones accumulate for a long time, it can affect the flow rate of the water flow, and even block the barrier net.

[0005] Therefore, the present application provides a multi-stage sewage treatment device and a sewage treatment method thereof. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by the present application to solve its technical problems is: a multi-stage sewage treatment device according to the present application, comprising a pre-treatment tank, the pre-treatment tank is fixedly connected with a primary treatment tank on the side, the primary treatment tank is fixedly connected with a biological treatment tank on the side, and the biological treatment tank is fixedly connected with a depth treatment tank on the side; a pollution blocking device body is arranged in the pre-treatment tank, the pollution blocking device body comprises a barrier net, a drainage groove is formed in the barrier net, a fixed support is fixedly connected with the barrier net on the side, and a reciprocating poking mechanism is arranged on the side of the pollution blocking device body.

[0008] The reciprocating poking mechanism comprises a reciprocating moving rod for cleaning the stones, and the reciprocating moving rod is slidably connected in the drainage groove.

[0009] Preferably, the reciprocating dial mechanism further comprises a support frame, which is detachably connected to the side of the fixed support, a bidirectional rotating screw rod is rotatably connected to the upper part of the support frame, a moving block is threadedly connected to the outer ring surface of the bidirectional rotating screw rod, and a rotating disc is fixedly connected to one end of the bidirectional rotating screw rod.

[0010] Preferably, the bottom of the moving block is rotatably connected with a first rotating connecting rod, a first support base is rotatably connected to the end of the first rotating connecting rod away from the moving block through a pin shaft, a first fixed block is fixedly connected to the upper surface of the first support base, a first rotating column is rotatably connected to the top of the first fixed block, and a limiting plate is fixedly connected to one end of the first rotating column.

[0011] Preferably, the side of the limiting plate away from the first rotating column is fixedly connected with a second fixed block, and the reciprocating moving rod is fixedly connected to the side of the second fixed block away from the limiting plate.

[0012] Preferably, a swing column is slidably connected to the inside of the limiting plate, a rotating plate is fixedly connected to the end of the swing column away from the limiting plate, a second rotating column is fixedly connected to the middle of the rotating plate, a third fixed block is arranged at the end of the second rotating column away from the rotating plate, the second rotating column is rotatably connected to the inside of the third fixed block, and the third fixed block is fixedly connected to the top of the third fixed block.

[0013] Preferably, the end of the first rotating column away from the limiting plate is fixedly connected with a rotating block, and the side of the fixed support is fixedly connected with a blocking block.

[0014] Preferably, the bottom of the first support base is fixedly connected with a connecting block, a second rotating connecting rod is rotatably connected to the inside of the connecting block, and a pushing plate is rotatably connected to the end of the second rotating connecting rod away from the connecting block.

[0015] Preferably, the bottom of the trash blocking device body is provided with a reset cleaning mechanism for cleaning stone blocks, the reset cleaning mechanism comprises a fixed plate, the fixed plate is fixedly connected to the bottom of the fixed support, a reset spring is fixedly connected to the side of the fixed plate, a rotating rod is fixedly connected to the end of the reset spring away from the fixed plate, a second support base is arranged at the bottom of the rotating rod, the rotating rod is rotatably connected to the top of the second support base, a guide block is fixedly connected to the upper surface of the rotating rod, a guide groove is formed in the inside of the guide block, and a collection box is detachably connected to the side wall of the fixed support.

[0016] A multi-stage sewage treatment method, in particular to:

[0017] Pretreatment: The trash body is placed in the sewage inlet of the pretreatment tank, and the inflowing sewage will flow into the sand pool through the drainage groove, and the larger impurities will be blocked outside the sand pool, but the smaller stones will be stuck in the drainage groove, so the reciprocating rod is reciprocated along the direction of the drainage groove by rotating the bidirectional rotating screw rod, so that the stones in the drainage groove are pushed out;

[0018] Primary treatment: After pretreatment, the sewage will flow into the primary treatment tank, and the suspended solids and part of the organic matter in the sewage are removed by gravity sedimentation;

[0019] Biological treatment: After the primary treatment tank, the sewage will flow into the biological treatment tank, and the microorganism population will decompose and transform the organic matter by using the activated sludge method, and at this time the transformed sewage is further treated by the biofilm formed by the microorganisms attached to the carrier surface;

[0020] Advanced treatment: After the biological treatment tank, the sewage will flow into the advanced treatment tank, and the small suspended solids and microorganisms are removed by filtration, and then the pathogens in the sewage are killed by using ultraviolet disinfection method, and finally the phosphorus and nitrogen nutrients in the sewage are removed by using chemical method.

[0021] The pretreatment is specifically that when the sewage containing stones flows into the sand pool through the blocking net, the larger impurities and stones are blocked outside the blocking net, and the water flow, smaller impurities and stones flow into the drainage groove, but part of the stones are stuck in the inside of the drainage groove, at this time the rotating disc is manually rotated, and the bidirectional rotating screw rod fixedly connected to the side surface of the rotating disc is rotated at the same time, because the threads at both ends of the bidirectional rotating screw rod are opposite, so the bidirectional rotating screw rod moves the two groups of moving blocks synchronously to the middle part of the bidirectional rotating screw rod at the same time, at this time the first rotating connecting rod rotatingly connected to the bottom of the moving block moves all the parts connected with the first supporting base away from the bidirectional rotating screw rod, at this time the reciprocating rod sliding in the inside of the drainage groove also moves away from the bidirectional rotating screw rod along the guide of the drainage groove, at this time the stones stuck in the inside of the drainage groove are knocked off by the movement of the reciprocating rod.

[0022] The beneficial effects of the present application are as follows:

[0023] 1. The present application rotates the rotating disc artificially to drive the bidirectional rotating screw rod fixedly connected therewith to rotate, which will drive the two groups of moving blocks threadedly connected therewith to move towards the middle part of the bidirectional rotating screw rod, further pushing the first support base to move away from the moving blocks through the first rotating connecting rod, at this time, the first rotating column, the limiting plate, the second fixed block and the reciprocating moving rod connected with the first fixed block will move away from the bidirectional rotating screw rod, since the reciprocating moving rod slides in the inside of the drainage groove, the smaller impurities stuck in the inside of the drainage groove can be removed while the reciprocating moving rod moves, thereby improving the flow rate of the water flow through the drainage groove, and the replacement frequency of the blocking net can be reduced through the cleaning of the impurities in the inside of the drainage groove, thereby reducing the cost of sewage treatment.

[0024] 2. The first support base moves away from the bidirectional rotating screw rod, which can drive the second fixed block rotatingly connected in the first fixed block to move away from the bidirectional rotating screw rod, since the rotating block is fixedly connected to one end of the first rotating column close to the vertical support of the fixed support, and since the blocking block is also fixedly connected to one side of the fixed support, when the rotating block and the blocking block abut against each other, the first rotating column will rotate slightly, thereby driving the limiting plate fixedly connected to the other end to rotate slightly, at this time, the reciprocating moving rod fixedly connected with the second fixed block and the limiting plate will also rotate slightly, since the fixed support is uniformly provided with a plurality of blocking blocks on the side surface, the reciprocating moving rod will reciprocate, thereby cleaning the substances attached to the side wall of the drainage groove, further improving the cleaning ability of the reciprocating moving rod, thereby prolonging the service life of the blocking net.

[0025] 3. The first support base moves downward, which can drive the connecting block, the second rotating connecting rod and the pushing plate to move away from the bidirectional rotating screw rod, when the first support base continuously moves, the pushing plate will slide into the guide groove opened at the top of the guide block, when the first support base continues to move, since the two groups of second rotating connecting rods have a certain angle, at this time, the second rotating connecting rods will rotate around the pin shaft in the middle of the connecting block, thereby driving the rotating rod to rotate around the pin shaft between the guide block and the second support base, at this time, the rotating rod will clean the gravel of the fixed support bottom plate and push the gravel on the fixed support into the collecting box, thereby avoiding the blocking effect of the gravel accumulation on the blocking net, further improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is a multi-stage sewage treatment process structure schematic diagram of the present application;

[0028] Figure 2 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0029] Figure 3 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0030] Figure 4 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0031] Figure 5 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0032] Figure 6 is a schematic diagram of the overall structure of a preferred embodiment of the present application; Figure 5 is an enlarged schematic diagram of A in the above figure;

[0033] Figure 7 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0034] Figure 8 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0035] Figure 9 is a schematic diagram of the overall structure of a preferred embodiment of the present application;

[0036] Figure 10 is a schematic diagram of the overall structure of a preferred embodiment of the present application.

[0037] Figure: 1, the main body of the trash blocking device; 101, the blocking net; 102, the drainage groove; 103, the fixed support;

[0038] 2, the reciprocating pushing mechanism; 201, the support frame; 202, the bidirectional rotating screw; 203, the moving block; 204, the rotating disc; 205, the first rotating connecting rod; 206, the first support base; 207, the first fixed block; 208, the first rotating column; 209, the limiting plate; 210, the second fixed block; 211, the reciprocating moving rod; 212, the swinging column; 213, the rotating plate; 214, the second rotating column; 215, the third fixed block; 216, the connecting block; 217, the second rotating connecting rod; 218, the pushing plate; 219, the rotating block; 220, the blocking block;

[0039] 3, the reset cleaning mechanism; 301, the fixed plate; 302, the reset spring; 303, the rotating rod; 304, the second support base; 305, the guide block; 306, the guide groove; 307, the collection box;

[0040] 4, the pretreatment tank; 5, the primary treatment tank; 6, the biological treatment tank; 7, the advanced treatment tank. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0042] Embodiment one

[0043] As shown in Figures 1 to 10 , one embodiment of the present application is:

[0044] A multi-stage sewage treatment device, comprising a pretreatment tank 4, the side of the pretreatment tank 4 is fixedly connected with a primary treatment tank 5, the side of the primary treatment tank 5 is fixedly connected with a biological treatment tank 6, and the side of the biological treatment tank 6 is fixedly connected with a depth treatment tank 7; the inside of the pretreatment tank 4 is provided with a trash blocking device body 1, the trash blocking device body 1 comprises a blocking net 101, the inside of the blocking net 101 is provided with a drainage groove 102, the side of the blocking net 101 is fixedly connected with a fixed support 103, and the side of the trash blocking device body 1 is provided with a reciprocating poking mechanism 2; the reciprocating poking mechanism 2 comprises a reciprocating moving rod 211 for cleaning the gravel, and the reciprocating moving rod 211 is slidingly connected in the inside of the drainage groove 102.

[0045] Specifically, although the existing blocking net 101 can isolate larger substances outside the process, since the impurities in the sewage are of different sizes, smaller stone blocks in the impurities are easy to be stuck in the gaps of the blocking net 101, thereby reducing the water flow through the blocking net 101 and further reducing the working efficiency.

[0046] Therefore, the present application solves the problem by setting a structure, by manually rotating the rotating disc 204 to drive the bidirectional rotating screw rod 202 fixedly connected therewith to rotate, while the bidirectional rotating screw rod 202 rotates, it drives the two groups of moving blocks 203 threadedly connected therewith to move to the middle part of the bidirectional rotating screw rod 202, further, it drives the first supporting base 206 to move away from the moving blocks 203 through the first rotating connecting rod 205, at this time, it drives the first rotating column 208, the limiting plate 209, the second fixed block 210 and the reciprocating moving rod 211 away from the bidirectional rotating screw rod 202 through the first fixed block 207, since the reciprocating moving rod 211 slides in the inside of the drainage groove 102, when the reciprocating moving rod 211 moves, it can remove the small impurities stuck in the inside of the drainage groove 102, thereby improving the flow rate of the water flow through the drainage groove 102, after the pretreatment, it enters into the primary treatment tank 5 to remove the suspended solids and part of the organic matters in the sewage by gravity sedimentation; after the sewage through the primary treatment tank 5, it flows into the biological treatment tank 6 to decompose and transform the organic matters by the microbial population by the activated sludge method, at this time, the transformed sewage is further treated by the biofilm formed by the microorganisms adhering to the carrier surface; after the sewage through the biological treatment tank 6, it flows into the advanced treatment tank 7, and removes the small suspended solids and microorganisms by filtration, then it kills the pathogens in the sewage by the ultraviolet disinfection method, finally, it removes the phosphorus and nitrogen substances in the sewage by the chemical method.

[0047] As shown in Figure 3 The present embodiment reciprocating poking mechanism 2 further comprises a supporting frame 201, which is detachably connected to the side of the fixed support 103, the upper part of the supporting frame 201 is rotationally connected with the bidirectional rotating screw rod 202, the outer ring surface of the bidirectional rotating screw rod 202 is threadedly connected with the moving block 203, and one end of the bidirectional rotating screw rod 202 is fixedly connected with the rotating disc 204.

[0048] Specifically, in the process of treating the sewage containing impurities such as gravel, small gravel may be stuck in the drainage groove 102, after a certain period of time, the rotating disc 204 is manually rotated counterclockwise, thereby driving the bidirectional rotating screw rod 202 fixedly connected with the rotating disc 204 to rotate counterclockwise, since the outer ring surface of the bidirectional rotating screw rod 202 is provided with two groups of opposite threads, when the bidirectional rotating screw rod 202 rotates, it drives the two groups of moving blocks 203 to move to the middle part of the bidirectional rotating screw rod 202.

[0049] As shown in Figure 4As shown, the bottom of the mobile block 203 is rotatably connected with a first rotating connecting rod 205, one end of the first rotating connecting rod 205 away from the mobile block 203 is rotatably connected with a first supporting base 206 through a pin shaft, the upper surface of the first supporting base 206 is fixedly connected with a first fixed block 207, the top of the first fixed block 207 is rotatably connected with a first rotating column 208, one end of the first rotating column 208 is fixedly connected with a limiting plate 209.

[0050] Specifically, when the two groups of mobile blocks 203 move to the middle part of the bidirectional rotating lead screw 202, the first rotating connecting rod 205 rotatably connected with the bottom of the mobile block 203 will move synchronously, at this time, the first supporting base 206 rotatably connected with the first rotating connecting rod 205 away from the mobile block 203 through a pin shaft will move away from the bidirectional rotating lead screw 202, since the first fixed block 207 is fixed on the upper part of the first supporting base 206, the first fixed block 207 will also move synchronously when the first fixed block 207 moves, at this time, the first rotating column 208 rotatably connected with the top of the first fixed block 207 and the limiting plate 209 fixed on one end of the first rotating column 208 will also move synchronously away from the bidirectional rotating lead screw 202.

[0051] As shown in the figure, Figure 5 The limiting plate 209 away from the first rotating column 208 is fixedly connected with a second fixed block 210, and a reciprocating moving rod 211 is fixedly connected to the side of the second fixed block 210 away from the limiting plate 209.

[0052] Specifically, when the first rotating column 208 moves away from the bidirectional rotating lead screw 202, it will drive the second fixed block 210 fixedly connected thereto and the reciprocating moving rod 211 fixedly connected with the second fixed block 210 to move away from the bidirectional rotating lead screw 202, at this time, the gravel stuck in the drainage groove 102 will be pushed off by the reciprocating moving rod 211.

[0053] As shown in the figure, Figure 6 The limiting plate 209 is slidably connected with a swing column 212 inside, one end of the swing column 212 away from the limiting plate 209 is fixedly connected with a rotating plate 213, the middle of the rotating plate 213 is fixedly connected with a second rotating column 214, one end of the second rotating column 214 away from the rotating plate 213 is provided with a third fixed block 215, the second rotating column 214 is rotatably connected inside the third fixed block 215, and the third fixed block 215 is fixedly connected to the top of the third fixed block 215.

[0054] As shown in the figure, Figure 7 The first rotating column 208 away from the limiting plate 209 is fixedly connected with a rotating block 219, and the fixed support 103 is fixedly connected with a blocking block 220 on the side surface.

[0055] Specifically, when the first support base 206 and all the components on the first support base 206 move away from the bidirectional rotating lead screw 202, the rotating block 219 fixedly connected to the side of the first rotating column 208 will abut against the blocking block 220 fixedly connected to the side wall of the fixed support 103 while moving, at which time the rotating block 219 will rotate slightly, further driving the first rotating column 208, the limiting plate 209, the second fixed block 210 and the reciprocating moving rod 211 fixedly connected with the rotating block 219 to rotate slightly, at which time the swing column 212 sliding in the limiting plate 209 will rotate around the second rotating column 214 under the driving of the limiting plate 209, at which time the other components symmetrically distributed about the axis of the third fixed block 215 will rotate downward, and since the fixed support 103 is uniformly and staggeredly distributed with multiple groups of blocking blocks 220 on both sides, the two groups of reciprocating moving rods 211 will continuously swing up and down inside the drainage groove 102 while the first support base 206 continuously moves away from the bidirectional rotating lead screw 202, thereby improving the cleaning effect of the reciprocating moving rod 211 on the inner wall of the fixed support 103.

[0056] As shown in Figure 6 and Figure 8 , the first support base 206 is fixedly connected with a connecting block 216 at the bottom, the connecting block 216 is rotatably connected with a second rotating connecting rod 217 inside, and the second rotating connecting rod 217 is rotatably connected with a pushing plate 218 at the end away from the connecting block 216.

[0057] Specifically, since the connecting block 216 is fixedly connected with the bottom of the first support base 206, when the first support base 206 moves away from the bidirectional rotating lead screw 202, the connecting block 216, the second rotating connecting rod 217 rotatably connected with the connecting block 216 and the pushing plate 218 rotatably connected with the second rotating connecting rod 217 will move away from the bidirectional rotating lead screw 202 synchronously.

[0058] As shown in Figure 8 and Figure 9As shown, the bottom of the trash blocking device body 1 is provided with a reset cleaning mechanism 3 for cleaning stone blocks, the reset cleaning mechanism 3 comprises a fixed plate 301, the fixed plate 301 is fixedly connected to the bottom of the fixed support 103, the side of the fixed plate 301 is fixedly connected with a reset spring 302, in actual use, the reset spring 302 can be made of stainless steel corrosion-resistant material, which can be used in sewage for a long time; the end of the reset spring 302 away from the fixed plate 301 is fixedly connected with a rotating rod 303, the bottom of the rotating rod 303 is provided with a second support base 304, the rotating rod 303 is rotatably connected to the top of the second support base 304, the upper surface of the rotating rod 303 is fixedly connected with a guide block 305, the guide block 305 is internally provided with a guide groove 306, and the side wall of the fixed support 103 is detachably connected with a collection box 307.

[0059] Specifically, since the connecting block 216, the second rotating connecting rod 217 and the push plate 218 move with the movement of the first support base 206, when the first support base 206 moves away from the bidirectional rotating lead screw 202, the push plate 218 will abut against the bottom of the guide groove 306 opened at the top of the guide block 305, and since there is a certain angle between the two groups of second rotating connecting rods 217, when the push plate 218 abuts against the bottom of the guide groove 306, the two groups of second rotating connecting rods 217 will rotate around the pin shaft between the connecting block 216, at this time, the guide blocks 305 fixedly connected to the upper portions of the two groups of rotating rods 303 will rotate towards each other around the pin shaft in the middle of the second support base 304, at this time, the stone blocks falling on the planar structure of the fixed support 103 will be respectively pushed by the two groups of rotating rods 303 into the two groups of collection boxes 307, at this time, the two groups of reset springs 302 are in a compressed state, so that the situation that the water flow is slowed down due to the accumulation of stone blocks can be avoided, when the rotating disc 204 is rotated clockwise, the first support base 206 will move towards the bidirectional rotating lead screw 202, and at the same time, the two groups of connecting blocks 216, second rotating connecting rods 217 and push plates 218 will move towards the bidirectional rotating lead screw 202, at this time, the two groups of reset springs 302 will reset the rotating rods 303 to the initial state, so as to facilitate the use of next work, at this time, the collected stone blocks are taken out of the collection box 307 by manually opening the door provided on the side of the pretreatment box 4 for cleaning.

[0060] Embodiment two

[0061] As Figures 1 to 10 shown, another embodiment of the present application is:

[0062] A multi-stage sewage treatment method, the specific steps comprising:

[0063] Preprocessing: The trash screen body 1 is placed in the sewage inlet of the preprocessing tank 4, and the inflowing sewage will flow into the sand trap through the drainage groove 102, at which time the larger impurities will be blocked outside the sand trap, but since smaller stones will be stuck in the drainage groove 102, the reciprocating rod 211 will be reciprocated along the direction of the drainage groove 102 by rotating the bidirectional rotating lead screw 202, so as to push out the stones inside the drainage groove 102.

[0064] Primary treatment: After preprocessing, the sewage will enter the primary treatment tank 5, and the suspended solids and part of the organic matter in the sewage will be removed by gravity sedimentation.

[0065] Biological treatment: After the primary treatment tank 5, the sewage will flow into the biological treatment tank 6, and the microorganism population will be used to decompose and transform organic matter by using the activated sludge method, at which time the transformed sewage will be further treated by the biofilm formed by the microorganisms attached to the carrier surface.

[0066] Advanced treatment: After the biological treatment tank 6, the sewage will flow into the advanced treatment tank 7, and the small suspended solids and microorganisms will be removed by filtration, and then the pathogen in the sewage will be killed by using the ultraviolet disinfection method, and finally the phosphorus and nitrogen substances in the sewage will be removed by using the chemical method.

[0067] The preprocessing specifically includes that when the sewage containing stones flows into the sand trap through the blocking net 101, the larger impurities and stones will be blocked outside the blocking net 101, and the water flow, smaller impurities and stones will flow in through the drainage groove 102, but since part of the stones will be stuck inside the drainage groove 102, at which time the reciprocating rod 211 will be moved away from the bidirectional rotating lead screw 202 by rotating the rotating disc 204, and the first rotating connecting rod 205 connected to the bottom of the moving block 203 will move away from the bidirectional rotating lead screw 202, and the reciprocating rod 211 will be moved away from the bidirectional rotating lead screw 202 along the guide of the drainage groove 102, so that the stones stuck in the drainage groove 102 can be knocked off by the reciprocating rod 211.

[0068] The working principle is that when sewage containing impurities such as gravel is treated, small gravel may be stuck in the drainage groove 102, at which time the rotating disc 204 is manually rotated counterclockwise, and the bidirectional rotating screw rod 202 fixedly connected with the rotating disc 204 is also counterclockwise, and since the outer ring surface of the bidirectional rotating screw rod 202 is provided with two groups of opposite threads, when the bidirectional rotating screw rod 202 rotates, the two groups of moving blocks 203 will move to the middle part of the bidirectional rotating screw rod 202.

[0069] When the two groups of moving blocks 203 move to the middle part of the bidirectional rotating screw rod 202, the first rotating connecting rod 205 rotatably connected with the bottom of the moving block 203 will also move synchronously, at which time the first support base 206 rotatably connected with the end of the first rotating connecting rod 205 away from the moving block 203 will move away from the bidirectional rotating screw rod 202, and since the first fixed block 207 is fixed to the upper part of the first support base 206, the first fixed block 207 will also move synchronously, at which time the first rotating column 208 rotatably connected to the top of the first fixed block 207 and the limiting plate 209 fixed to one end of the first rotating column 208 will also move away from the bidirectional rotating screw rod 202.

[0070] When the first rotating column 208 moves away from the bidirectional rotating screw rod 202, the second fixed block 210 fixedly connected with the first rotating column 208 and the reciprocating moving rod 211 fixedly connected with the second fixed block 210 will also move away from the bidirectional rotating screw rod 202, at which time the gravel stuck in the drainage groove 102 will be pushed down by the reciprocating moving rod 211.

[0071] When the first support base 206 and all the components on the first support base 206 move away from the bidirectional rotating screw rod 202, the rotating block 219 fixedly connected to the side of the first rotating column 208 will abut against the blocking block 220 fixedly connected to the side wall of the fixed support 103 while moving, at which time the rotating block 219 will rotate slightly, further driving the first rotating column 208, the limiting plate 209, the second fixed block 210 and the reciprocating moving rod 211 fixedly connected with the rotating block 219 to rotate slightly, at which time the swing column 212 sliding in the limiting plate 209 will rotate around the second rotating column 214 under the driving of the limiting plate 209, at which time the other components symmetrically distributed about the axis of the third fixed block 215 will rotate downward, and since the fixed support 103 is uniformly and staggeredly provided with a plurality of blocking blocks 220 on both sides, when the first support base 206 continuously moves away from the bidirectional rotating screw rod 202, the two reciprocating moving rods 211 will continuously swing up and down in the drainage groove 102, thereby improving the cleaning effect of the reciprocating moving rod 211 on the inner wall of the fixed support 103.

[0072] Since the connecting block 216 is fixedly connected with the bottom of the first supporting base 206, when the first supporting base 206 moves away from the bidirectional rotating lead screw 202, the connecting block 216, the second rotating connecting rod 217 rotatably connected with the connecting block 216 and the pushing plate 218 rotatably connected with the second rotating connecting rod 217 will move away from the bidirectional rotating lead screw 202 synchronously.

[0073] Since the connecting block 216, the second rotating connecting rod 217 and the pushing plate 218 move with the first supporting base 206, when the first supporting base 206 moves away from the bidirectional rotating lead screw 202, the pushing plate 218 will abut against the bottom of the guide groove 306 opened at the top of the guide block 305, since the two groups of second rotating connecting rods 217 have a certain angle, when the pushing plate 218 abuts against the bottom of the guide groove 306, the two groups of second rotating connecting rods 217 will rotate around the pin shaft between the connecting block 216, at this time, the guide blocks 305 fixedly connected with the upper portions of the two groups of rotating rods 303 will move towards each other around the pin shaft in the middle of the second supporting base 304, at this time, the stone blocks falling on the planar structure of the fixed support 103 will be pushed into the two groups of collecting boxes 307 by the two groups of rotating rods 303 respectively, at this time, the two groups of return springs 302 are in compressed state, so that the situation that the water flow is slowed down due to the accumulation of stone blocks can be avoided, when the rotating disc 204 is rotated clockwise, the first supporting base 206 will move towards the bidirectional rotating lead screw 202, and the two groups of connecting blocks 216, the second rotating connecting rods 217 and the pushing plate 218 will move towards the bidirectional rotating lead screw 202 synchronously, at this time, the two groups of return springs 302 will return to make the rotating rods 303 return to the initial state, so as to facilitate the use of next work.

[0074] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sewage treatment device, characterized in that: The invention comprises a pretreatment box (4), wherein the side of the pretreatment box (4) is fixedly connected to a primary treatment box (5), the side of the primary treatment box (5) is fixedly connected to a biological treatment box (6), and the side of the biological treatment box (6) is fixedly connected to a deep treatment box (7); a pollution blocking device body (1) is provided inside the pretreatment box (4), the pollution blocking device body (1) comprises a blocking net (101), a drainage groove (102) is provided inside the blocking net (101), a fixed bracket (103) is fixedly connected to the side of the blocking net (101), and a reciprocating toggle mechanism (2) is provided on the side of the pollution blocking device body (1); The reciprocating mechanism (2) includes a reciprocating rod (211) for cleaning gravel, and the reciprocating rod (211) is slidably connected to the inside of the drainage trough (102); The reciprocating mechanism (2) further comprises a support frame (201), the support frame (201) being detachably connected to a side surface of the fixed support (103), the upper portion of the support frame (201) being rotatably connected to a bidirectional rotating screw rod (202), the outer annular surface of the bidirectional rotating screw rod (202) being threadedly connected to a moving block (203), and one end of the bidirectional rotating screw rod (202) being fixedly connected to a rotating disc (204); The bottom of the moving block (203) is rotatably connected to a first rotating connecting rod (205); one end of the first rotating connecting rod (205) away from the moving block (203) is rotatably connected to a first supporting base (206) via a pin; the upper surface of the first supporting base (206) is fixedly connected to a first fixed block (207); the top of the first fixed block (207) is rotatably connected to a first rotating column (208); one end of the first rotating column (208) is fixedly connected to a limiting plate (209); A second fixed block (210) is fixedly connected to a side of the limiting plate (209) away from the first rotating column (208), and the reciprocating rod (211) is fixedly connected to a side of the second fixed block (210) away from the limiting plate (209); The limiting plate (209) is internally slidably connected to a swing column (212), an end of the swing column (212) away from the limiting plate (209) is fixedly connected to a rotating plate (213), a second rotating column (214) is fixedly connected to the middle of the rotating plate (213), an end of the second rotating column (214) away from the rotating plate (213) is provided with a third fixed block (215), the second rotating column (214) is rotatably connected to the inside of the third fixed block (215), and the third fixed block (215) is fixedly connected to the top of the third fixed block (215); One end of the first rotating column (208) away from the limiting plate (209) is fixedly connected to a rotating block (219), and a side surface of the fixed bracket (103) is fixedly connected to a blocking block (220).

2. A multi-stage sewage treatment device according to claim 1, characterized in that: A connecting block (216) is fixedly connected to the bottom of the first supporting base (206), a second rotating connecting rod (217) is rotatably connected inside the connecting block (216), and an end of the second rotating connecting rod (217) away from the connecting block (216) is rotatably connected to a push plate (218).

3. The multi-stage sewage treatment device according to claim 1, characterized in that: A reset cleaning mechanism (3) for cleaning stones is provided at the bottom of the dirt-blocking device body (1), the reset cleaning mechanism (3) comprising a fixed plate (301), the fixed plate (301) being fixedly connected to the bottom of the fixed bracket (103), a reset spring (302) being fixedly connected to the side of the fixed plate (301), an end of the reset spring (302) away from the fixed plate (301) being fixedly connected to a rotating rod (303), a second supporting base (304) being provided at the bottom of the rotating rod (303), the rotating rod (303) being rotatably connected to the top of the second supporting base (304), a guide block (305) being fixedly connected to the upper surface of the rotating rod (303), a guide groove (306) being provided inside the guide block (305), and a collecting box (307) being detachably connected to the side wall of the fixed bracket (103).

4. A multi-stage sewage treatment method, using the multi-stage sewage treatment device according to claim 1, characterized in that: Specifically: Pretreatment: The sewage intercepting device body (1) is placed at the sewage inlet of the pretreatment box (4). The sewage flows into the grit chamber through the drainage trough (102). At this time, larger impurities are blocked outside the grit chamber. However, since smaller stones will get stuck in the drainage trough (102), the reciprocating rod (211) is moved back and forth along the direction of the drainage trough (102) by rotating the bidirectional rotating screw (202), thereby removing the stones inside the drainage trough (102). Primary treatment: After pretreatment, the wastewater enters the primary treatment tank (5) and uses gravity sedimentation to remove suspended solids and some organic matter in the wastewater; Biological treatment: After passing through the primary treatment tank (5), the sewage will flow into the biological treatment tank (6) and use the activated sludge method to use microbial groups to decompose and transform organic matter. At this time, the sewage after transformation is further treated by microorganisms attaching to the surface of the carrier to form a biofilm; Deep treatment: After passing through the biological treatment tank (6), the sewage will flow into the deep treatment tank (7), where it will be filtered to remove fine suspended solids and microorganisms. Ultraviolet disinfection will then be used to kill pathogens in the sewage. Finally, chemical methods will be used to remove nitrogen and phosphorus to remove phosphorus and nitrogen substances in the sewage.

5. A multi-stage sewage treatment method according to claim 4, characterized in that: The pretreatment is specifically as follows: first, when the sewage containing stones flows into the sand settling tank through the barrier net (101), the larger impurities and stones will be blocked outside by the barrier net (101), while the water flow and smaller impurities and gravel will flow into the drainage trough (102). However, since some gravel will be stuck in the drainage trough (102) and cause blockage, at this time, the rotating disc (204) is manually rotated. When the rotating disc (204) rotates, the bidirectional rotating screw (202) fixedly connected to the side of the rotating disc (204) is driven to rotate. Since the threads at both ends of the bidirectional rotating screw (202) are opposite, the bidirectional rotating screw (202) rotates. At the same time, the two groups of moving blocks (203) will be driven to move synchronously toward the middle of the bidirectional rotating screw rod (202). At this time, the first rotating connecting rod (205) connected to the bottom of the moving block (203) will drive the first support base (206) and all parts connected to the first support base (206) to move in a direction away from the bidirectional rotating screw rod (202). At this time, the reciprocating moving rod (211) sliding inside the drainage groove (102) will also move along the guide direction of the drainage groove (102) away from the bidirectional rotating screw rod (202). At this time, the broken stones stuck in the drainage groove (102) can be knocked down by the movement of the reciprocating moving rod (211).

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