Sludge biological treatment system

Abstract

The invention relates to the technical field of sludge treatment, in particular to a sludge biological treatment system which comprises a fermentation box, the device further comprises an anaerobic fermentation area, an aerobic fermentation area, a precipitation tank plate, an aeration assembly, a transfer tank, a biological tank and a sludge outlet auger, the precipitation tank plate is in a V shape and installed in the middle of the fermentation box, the fermentation box is divided into the anaerobic fermentation area, the aerobic fermentation area and the precipitation area by the precipitation tank plate, the aeration assembly is installed at the bottom of the aerobic fermentation area, and the transfer tank is installed in the sludge outlet auger. The transfer tank is installed outside the fermentation box and communicated with a sludge outlet of the fermentation box, the lower end of the transfer tank is connected with the input end of the biological tank, the transfer tank is used for evaporating sludge moisture, a biological conversion bed is arranged in the biological tank, the biological tank is used for biological treatment of sludge, and the sludge outlet auger is installed outside the biological tank. The input end of the sludge outlet auger is connected with the output end of the biological tank; the high-integration fermentation box is adopted, the fermentation speed is high, fermentation is more sufficient, sludge can be preliminarily separated, and the subsequent biological treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and particularly to a sludge biological treatment system. Background Art

[0002] In the production and living processes, a large amount of sewage, sludge, and industrial hazardous solid waste sludge are generated. These pollutants usually need to be purified by an activated biological method. Multiple sewage sludge biological treatment systems and devices are disclosed in the prior art. For example, a sludge biological treatment system proposed in a Chinese invention patent with the publication number CN108046553B includes a sludge storage tank, a first screw conveyor, a fermentation tank, a second screw conveyor, a third screw conveyor, and a biological conversion bed. There is a crossbeam above the first screw conveyor, and a feeding truck is provided on the crossbeam. The sludge in the sludge storage tank is transported to the fermentation tank through the first screw conveyor. During this process, the feeding truck inputs materials such as sludge fermentation agents into the first screw conveyor. The materials are stirred and mixed with the sludge under the action of the screw shaft of the first screw conveyor. The mixed sludge ferments in the fermentation tank. After fermentation is completed, the sludge is transported to the third screw conveyor through the second screw conveyor. The third screw conveyor transports the fermented sludge to the biological conversion bed through the discharge port for biological treatment.

[0003] However, the pretreatment method of the above treatment system for sludge before being sent to the biological conversion bed is relatively simple. It only allows the sludge and materials to ferment in the fermentation tank, and there is no detailed description of the fermentation tank. If the traditional stacking fermentation method is used, the fermentation speed is slow, and the components in the sludge that are difficult to be fermented and decomposed and bioconverted are not effectively separated, which is not conducive to the subsequent treatment in the biological conversion bed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a sludge biological treatment system that uses a highly integrated fermentation tank, has a faster and more sufficient fermentation speed, can initially separate sludge, and improve the efficiency of subsequent biological treatment.

[0005] A sludge biological treatment system of the present invention includes a fermentation tank. A fermentation chamber is arranged inside the fermentation tank, and a sludge inlet pipe communicating with the fermentation chamber is installed at the upper left part of the fermentation tank. It also includes an anaerobic fermentation area, an aerobic fermentation area, a sedimentation tank plate, an aeration assembly, a transfer tank, a biological pond, and a sludge discharge auger. The sedimentation tank plate is V-shaped and installed in the middle of the fermentation chamber of the fermentation tank. The upper left edge of the sedimentation tank plate is connected to the top wall of the fermentation tank, and a passage 1 is arranged between the upper right edge of the sedimentation tank plate and the bottom wall of the fermentation tank. A passage 2 is arranged between the bottom of the sedimentation tank plate and the bottom wall of the fermentation tank. The space between the left part of the sedimentation tank plate and the left side wall of the fermentation tank is the anaerobic fermentation area, and the space between the right part of the sedimentation tank plate and the right side wall of the fermentation tank is the aerobic fermentation area. The anaerobic fermentation area and the aerobic fermentation area are connected by the passage 2, and the aerobic fermentation area and the sedimentation tank plate are connected by the passage 1. The space inside the sedimentation tank plate is the sedimentation area, and a defoaming assembly is arranged at the upper part of the sedimentation area. The aeration assembly is installed at the bottom of the aerobic fermentation area. A sludge outlet is installed on the fermentation tank and is communicated with the bottom of the sedimentation area of the sedimentation tank plate. The transfer tank is installed outside the fermentation tank, and the input end of the transfer tank is communicated with the sludge outlet of the fermentation tank. The lower end of the transfer tank is connected to the input end of the biological pond. The transfer tank is used for evaporating the moisture of the sludge. A biological conversion bed is arranged in the biological pond, and the biological pond is used for biologically treating the sludge. The sludge discharge auger is installed outside the biological pond, and the input end of the sludge discharge auger is connected to the output end of the biological pond. The water level of the aerobic fermentation area is set lower than that of the anaerobic fermentation area to form a pressure difference on both sides of the passage 2. An anaerobic bacteria sludge bed is arranged at the bottom of the anaerobic fermentation area. The sludge is input into the anaerobic fermentation area through the sludge inlet pipe. The sludge undergoes anaerobic fermentation in the anaerobic fermentation area. The sludge that has undergone anaerobic fermentation at the bottom of the anaerobic fermentation area enters the bottom of the aerobic fermentation area through the passage 2 under the action of the above-mentioned pressure difference. The sludge undergoes aerobic fermentation in the aerobic fermentation area. The aeration assembly aerates the bottom of the aerobic fermentation area, and the aeration stirs the sludge in the aerobic fermentation area, improving the aerobic fermentation and oxidation speed, and causing the sludge particles to mix with the bubbles to form agglomerates and float. The floating sludge agglomerates enter the sedimentation area inside the sedimentation tank plate through the passage 1. The defoaming assembly pierces the bubbles of the agglomerates, causing the sludge particles to precipitate to the bottom of the sedimentation tank plate, and the floating substances and other floating complexes in the sludge are salvaged and separated. The sludge precipitated at the bottom of the sedimentation tank plate is discharged into the transfer tank through the sludge outlet. The sludge evaporates moisture during the process of flowing along the transfer tank to the biological pond. The relatively dry sludge enters the biological pond and is preliminarily biologically converted by plants or animals in the biological pond. The sludge discharge auger conveys the sludge at the output end of the biological pond outward, enabling the sludge at the input end of the biological pond to move towards the output end and be preliminarily biologically converted during the movement. Compared with the prior art, an integrated fermentation tank is used to perform anaerobic fermentation and aerated aerobic fermentation on the sludge, with a faster and more sufficient fermentation speed. It can initially separate the components that are difficult to be fermented and biologically converted, which is beneficial to improving the efficiency of subsequent biological treatment. The biological pond is used to perform preliminary biological conversion on the sludge polarity, further improving the efficiency of subsequent biological treatment.

[0006] Preferably, the aeration assembly includes an aeration pump, a first air pipe, a plurality of aeration heads, and a return air pipe. The output end of the aeration pump is connected to the input end of the first air pipe. A plurality of aeration heads are installed at the output end of the first air pipe. The plurality of aeration heads are located at the bottom of the aerobic fermentation zone. One input end of the aeration pump is connected to the output end of the return air pipe. The input end of the return air pipe extends above the sedimentation zone of the sedimentation tank plate. The aeration pump operates to output air or oxygen. The air or oxygen is transported through the first air pipe and aerates the bottom of the aerobic fermentation zone through the plurality of aeration heads. The excess air or oxygen above the sedimentation zone of the sedimentation tank plate is extracted through the return air pipe and refluxed to the aeration pump to achieve the recycling of the excess air or oxygen. The insufficient part is supplemented through other input ends of the aeration pump.

[0007] Preferably, it further includes an oxygen supplement machine and an air supply pipe. The output end of the oxygen supplement machine is installed with the air supply pipe. The air supply pipe is connected to one input end of the aeration pump. The oxygen supplement machine is an oxygen generator or an ozone generator. The oxygen supplement machine transports oxygen or ozone to one input end of the aeration pump through the air supply pipe to achieve different aeration effects.

[0008] Preferably, the defoaming assembly includes a first shaft and a plurality of thorns. The first shaft is rotatably installed inside the fermentation tank. The first shaft is located above the sedimentation tank plate and is close to the first channel. A plurality of thorns are installed on the outer wall of the first shaft. The first shaft drives the plurality of thorns to rotate. The plurality of thorns prick the agglomerates of sludge and bubbles, causing the bubbles to burst quickly, so that the sludge precipitates to the bottom of the sedimentation tank plate. The bubbles in the unpricked agglomerates absorb each other and become larger and then burst naturally, improving the sludge sedimentation efficiency.

[0009] Preferably, it further includes a first roller, a second roller, a conveyor belt, and a plurality of push plates. The first roller is rotatably installed outside the fermentation tank. The second roller is rotatably installed in the fermentation chamber of the fermentation tank. The second roller is located above the sedimentation zone of the sedimentation tank plate. The conveyor belt is sleeved on the first roller and the second roller. A plurality of push plates are evenly installed on the outer wall of the conveyor belt. The first roller and the second roller rotatably support the conveyor belt. An avoidance opening for the conveyor belt is provided on the side wall of the fermentation tank. When the first roller rotates, it drives the conveyor belt to rotate. The conveyor belt drives the plurality of push plates to rotate, so that the plurality of push plates fish out the floating objects in the sedimentation zone of the sedimentation tank plate and transport them outside the fermentation tank.

[0010] Preferably, it further includes a sprocket shaft, a second sprocket shaft, a chain, and a scraper. The sprocket shaft and the second sprocket shaft are rotatably installed in the fermentation chamber of the fermentation tank. The sprocket shaft and the second sprocket shaft are located at the top of the anaerobic fermentation zone. Sprockets are installed on both the sprocket shaft and the second sprocket shaft. The chain is sleeved on the sprockets of the sprocket shaft and the second sprocket shaft. A scraper is installed on the outer wall of the chain. The sprockets of the sprocket shaft and the second sprocket shaft rotatably support the chain. When the second sprocket shaft rotates, it drives the chain to rotate. The chain drives the scraper to move, so that the scraper levels the top of the sludge in the anaerobic fermentation zone, making the sludge input by the mud inlet pipe evenly distributed.

[0011] Preferably, it further includes a screw conveyor pipe, a sludge discharge port, and screw conveyor blades. The screw conveyor pipe is installed at the sludge outlet of the fermentation tank. The screw conveyor pipe is located outside the fermentation tank. A sludge discharge port is arranged on the side wall of the screw conveyor pipe away from the fermentation tank. The screw conveyor blades are rotatably installed in the screw conveyor pipe and extend into the bottom of the sedimentation tank plate. The screw conveyor blades are driven by a driving mechanism. When the screw conveyor blades rotate, the sludge sedimented at the bottom of the sedimentation tank plate is pushed towards the screw conveyor pipe and discharged through the sludge discharge port onto the transfer tank, improving the sludge discharge efficiency.

[0012] Preferably, it further includes a sleeve, a sewage pipeline, and multiple spray nozzles. The sleeve is sleeved on the outer wall of the screw conveyor pipe. A sewage chamber is arranged between the sleeve and the screw conveyor pipe. Multiple water filtering holes are arranged on the part of the screw conveyor pipe located inside the sleeve. The screw conveyor blades are variable-pitch spiral blades, and the pitch of the screw conveyor blades gradually decreases from the sedimentation tank plate outwards. The input end of the sewage pipeline is connected to the sewage chamber, and the output end of the sewage pipeline is equipped with multiple spray nozzles. The multiple spray nozzles are located in the second channel below the sedimentation tank plate, and the multiple spray nozzles face the aerobic fermentation area. The variable-pitch setting of the screw conveyor blades causes the sludge entering the screw conveyor pipe to be gradually compressed, thereby squeezing out the moisture. The moisture enters the sewage chamber between the sleeve and the screw conveyor pipe through the filtering holes. The sewage pump on the sewage pipeline operates to transport the sewage through the sewage pipeline and spray it through the multiple spray nozzles towards the aerobic fermentation area, pushing the anaerobically fermented sludge in the second channel towards the aerobic fermentation area, improving the sludge transfer efficiency and avoiding the pollution caused by direct sewage discharge.

[0013] Preferably, the transfer trough includes an upper guide trough, a middle guide trough, a lower guide trough, an upper gate plate, a middle gate plate and a transmission assembly. The upper guide trough, the middle guide trough and the lower guide trough are stacked from top to bottom, and the upper guide trough, the middle guide trough and the lower guide trough are all inclined. The upper end of the upper guide trough is located below the mud discharge port, and the upper end of the upper guide trough and the upper end of the middle guide trough are respectively provided with opening one and opening two, and opening one and opening two are arranged up and down. The upper gate plate is rotatably installed in the opening one of the upper guide trough by rotating shaft one, and the upper gate plate closes or opens opening one, and the middle gate plate is rotatably installed in the opening two of the middle guide trough by rotating shaft two, and the middle gate plate closes or opens opening two, and the rotating shaft one of the upper gate plate and the rotating shaft two of the middle gate plate are connected by transmission assembly, and the upper gate plate and the middle gate plate are not arranged in parallel; the relative angle of the upper gate plate and the middle gate plate is adjusted so that when the upper gate plate rotates angle one to open the opening one of the upper guide trough, the middle gate plate rotates angle two to open the opening two of the middle guide trough through the transmission action of the transmission assembly. Close; when the upper gate rotates to an angle of three to open the opening of the upper guide groove, the middle gate rotates to an angle of four to open the opening of the middle guide groove through the transmission action of the transmission assembly; during operation, the sludge output from the mud discharge port falls on the upper guide groove and flows downward, and when opening one is closed, the sludge continues to flow downward along the upper guide groove, and when the upper gate rotates to an angle of one to open the opening of the upper guide groove, the sludge falls through opening one to the middle guide groove and flows downward along the middle guide groove, and when the upper gate rotates to an angle of three to open the opening of the upper guide groove, the sludge falls through opening one and opening two to the lower guide groove and flows downward along the lower guide groove. In this way, the angle of the upper gate is intermittently changed, so that the sludge falls evenly on the upper guide groove, the middle guide groove and the lower guide groove to realize multi-layer transportation, thereby improving the efficiency of sludge drying. Furthermore, the number of middle guide grooves can be increased and the relative angle between the upper gate and multiple middle gates can be adaptively adjusted, thereby increasing the number of layers and efficiency of sludge drying.

[0014] Preferably, the biological pond comprises a pond body, a biological cage, an electrode 1, a filter plate and an electrode 2, the output ends of the upper guide groove, the middle guide groove and the lower guide groove are all extended into the input end of the pond body, the biological cage is installed in the pond body, and gaps are set between the biological cage and the side walls and bottom of the pond body, the electrode 1 is installed in the electrode 1, the filter plate is installed at the output end of the pond body, the electrode 2 is installed on the inner side of the filter plate, and the input end of the mud auger is connected to the output end of the pond body; plants enriched with heavy metals and animals such as earthworms that degrade pollutants are arranged in the biological cage. After the sludge enters the tank body, it flows through the gap between the biological cage and the tank body to the mud outlet auger. In this process, the roots of the plants absorb the heavy metal ions in the sludge and enrich them in the stems and leaves. Electrode 1 is energized to form an electric field to attract heavy metal ions to gather in the biological cage, thereby improving the efficiency of plant enrichment of heavy metal ions. Similarly, electrode 2 is energized to form an electric field to attract anions, causing the anions to gather on the inside of the filter plate. The filter plate intercepts the sludge, thereby realizing the preliminary enrichment and separation of heavy metals in the sludge, and preliminary biological treatment.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: An integrated fermentation tank is used for anaerobic fermentation and aerated aerobic fermentation of sludge, with a relatively fast and more sufficient fermentation speed, which can initially separate components that are difficult to be fermented, decomposed and biotransformed, facilitating the improvement of the efficiency of subsequent biological treatment. A biological tank is used for preliminary biological transformation of the sludge polarity to further improve the efficiency of subsequent biological treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic axonometric partial sectional structural diagram of the present invention; Figure 3 is a schematic axonometric structural diagram of the present invention; Figure 4 is a schematic partial sectional structural diagram of structures such as a fermentation tank, an aeration component, a conveyor belt, a push plate, a scraper, a screw pipe and screw blades; Figure 5 is a schematic front sectional structural diagram of structures such as a fermentation tank, an aeration component, a conveyor belt, a push plate, a scraper, a screw pipe and screw blades; Figure 6 is a schematic structural diagram of structures such as a fermentation tank, an aeration component, a defoaming component, a conveyor belt, a push plate and a scraper; Figure 7 is a schematic structural diagram of structures such as a screw pipe, a sludge discharge port, screw blades, a sleeve, a sewage pipeline and a nozzle; Figure 8 is a schematic front sectional structural diagram of structures such as a screw pipe, a sludge discharge port, screw blades, a sleeve, a sewage pipeline and a nozzle; Figure 9 is a schematic structural diagram of a transfer tank; Figure 10 is a schematic diagram of the disassembled state of the transfer tank; Figure 11 is a schematic structural diagram of a biological tank.

[0017] Reference numerals in the drawings: 1, fermentation box; 2, anaerobic fermentation area; 3, aerobic fermentation area; 4, sedimentation tank plate; 5, aeration assembly; 6, transfer tank; 7, biological pond; 8, sludge discharge auger; 9, aeration pump; 10, air pipe 1; 11, aeration head; 12, return air pipe; 13, oxygen replenishing machine; 14, air supply pipe; 15, shaft 1; 16, acupuncture needle; 17, roller 1; 18, roller 2; 19, conveyor belt; 20, push plate; 21, sprocket shaft; 22, sprocket shaft 2; 23, chain; 24, scraper; 25, auger pipe; 26, sludge discharge port; 27, auger blade; 28, sleeve; 29, sewage pipeline; 30, nozzle; 31, upper guide groove; 32, middle guide groove; 33, lower guide groove; 34, upper gate plate; 35, middle gate plate; 36, transmission assembly; 37, pond body; 38, biological net cage; 39, electrode 1; 40, filter plate; 41, electrode 2. Detailed implementation mode

[0018] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive. Embodiment 1

[0019] As Figures 1 to 6As shown in the figure, a sludge biological treatment system includes a fermentation tank 1. The interior of the fermentation tank 1 is provided with a fermentation chamber. An inlet sludge pipe communicating with the fermentation chamber is installed at the upper left part of the fermentation tank 1. It also includes an anaerobic fermentation area 2, an aerobic fermentation area 3, a sedimentation tank plate 4, an aeration assembly 5, a transfer tank 6, a biological pond 7, and a sludge discharge auger 8. The sedimentation tank plate 4 is V-shaped and is installed in the middle of the fermentation chamber of the fermentation tank 1. The upper left edge of the sedimentation tank plate 4 is connected to the top wall of the fermentation tank 1. A passage one is provided between the upper right edge of the sedimentation tank plate 4 and the bottom wall of the fermentation tank 1. A passage two is provided between the bottom of the sedimentation tank plate 4 and the bottom wall of the fermentation tank 1. The space between the left part of the sedimentation tank plate 4 and the left side wall of the fermentation tank 1 is the anaerobic fermentation area 2. The space between the right part of the sedimentation tank plate 4 and the right side wall of the fermentation tank 1 is the aerobic fermentation area 3. The anaerobic fermentation area 2 and the aerobic fermentation area 3 are connected by the passage two. The aerobic fermentation area 3 and the sedimentation tank plate 4 are connected by the passage one. The interior space of the sedimentation tank plate 4 is the sedimentation area. An antifoaming assembly is provided at the upper part of the sedimentation area. The aeration assembly 5 is installed at the bottom of the aerobic fermentation area 3. A sludge outlet is installed on the fermentation tank 1 and is communicated with the bottom of the sedimentation area of the sedimentation tank plate 4. The transfer tank 6 is installed outside the fermentation tank 1. The input end of the transfer tank 6 is communicated with the sludge outlet of the fermentation tank 1. The lower end of the transfer tank 6 is connected to the input end of the biological pond 7. The transfer tank 6 is used for evaporating the moisture of the sludge. A biological conversion bed is provided in the biological pond 7. The biological pond 7 is used for biologically treating the sludge. The sludge discharge auger 8 is installed outside the biological pond 7. The input end of the sludge discharge auger 8 is connected to the output end of the biological pond 7. The antifoaming assembly includes a shaft one 15 and a plurality of thorns 16. The shaft one 15 is rotatably installed inside the fermentation tank 1. The shaft one 15 is located above the sedimentation tank plate 4 and is close to the passage one. A plurality of thorns 16 are installed on the outer wall of the shaft one 15. It also includes a roller one 17, a roller two 18, a conveyor belt 19, and a plurality of push plates 20. The roller one 17 is rotatably installed outside the fermentation tank 1. The roller two 18 is rotatably installed in the fermentation chamber of the fermentation tank 1. The roller two 18 is located above the sedimentation area of the sedimentation tank plate 4. The conveyor belt 19 is sleeved on the roller one 17 and the roller two 18. A plurality of push plates 20 are evenly installed on the outer wall of the conveyor belt 19. It also includes a sprocket shaft 21, a sprocket shaft two 22, a chain 23, and a scraper 24. The sprocket shaft 21 and the sprocket shaft two 22 are rotatably installed in the fermentation chamber of the fermentation tank 1. The sprocket shaft 21 and the sprocket shaft two 22 are located at the top of the anaerobic fermentation area 2. Sprockets are installed on both the sprocket shaft 21 and the sprocket shaft two 22. The chain 23 is sleeved on the sprockets of the sprocket shaft 21 and the sprocket shaft two 22. A scraper 24 is installed on the outer wall of the chain 23.

[0020] Set the water level in the aerobic fermentation zone 3 lower than that in the anaerobic fermentation zone 2 to create a pressure difference on both sides of the second channel. An anaerobic bacteria sludge bed is set at the bottom of the anaerobic fermentation zone 2. Sludge is input into the anaerobic fermentation zone 2 through the sludge inlet pipe. The sprockets of the sprocket shaft 21 and the second sprocket shaft 22 rotate to support the chain 23. When the second sprocket shaft 22 rotates, it drives the chain 23 to rotate. The chain 23 drives the scraper 24 to move, so that the scraper 24 levels the top of the sludge in the anaerobic fermentation zone 2, making the sludge input by the sludge inlet pipe evenly distributed. The sludge undergoes anaerobic fermentation in the anaerobic fermentation zone 2. The sludge that has undergone anaerobic fermentation at the bottom of the anaerobic fermentation zone 2 enters the bottom of the aerobic fermentation zone 3 through the second channel under the action of the above-mentioned pressure difference. The sludge undergoes aerobic fermentation in the aerobic fermentation zone 3 of the sludge. The aeration assembly 5 aerates the bottom of the aerobic fermentation zone 3. The aeration agitates the sludge in the aerobic fermentation zone 3, improving the aerobic fermentation and oxidation speed, and causing the sludge particles to mix with the bubbles to form agglomerates and float. The floating sludge agglomerates enter the precipitation area inside the sedimentation tank plate 4 through the first channel. The first shaft 15 drives multiple thorns 16 to rotate. The multiple thorns 16 pierce the agglomerates of sludge and bubbles, causing the bubbles to burst quickly, so that the sludge precipitates to the bottom of the sedimentation tank plate 4. The bubbles in the agglomerates that are not pierced absorb each other and become larger and then burst naturally, causing the sludge particles to precipitate to the bottom of the sedimentation tank plate 4. The first roller 17 and the second roller 18 rotate to support the conveyor belt 19. An avoidance opening for the conveyor belt 19 is provided on the side wall of the fermentation tank 1. When the first roller 17 rotates, it drives the conveyor belt 19 to rotate. The conveyor belt 19 drives multiple push plates 20 to rotate, so that the multiple push plates 20 fish out and separate the floating substances and other floating complexes in the precipitation area of the sedimentation tank plate 4 and convey them outside the fermentation tank 1. The sludge precipitated at the bottom of the sedimentation tank plate 4 is discharged into the transfer tank 6 through the sludge outlet. The sludge evaporates moisture during the process of flowing and transporting along the transfer tank 6 towards the biological pond 7. The relatively dry sludge enters the biological pond 7 and is preliminarily biotransformed by the plants with heavy metal enrichment functions or animals such as earthworms and maggots in the biological pond 7. The sludge discharge auger 8 conveys the sludge at the output end of the biological pond 7 outwards, enabling the sludge at the input end of the biological pond 7 to move towards the output end and be preliminarily biotransformed during the movement. Compared with the prior art, the integrated fermentation tank 1 is used to anaerobically ferment and aerobically ferment the sludge. The fermentation speed is faster and more sufficient, and it can initially separate the components that are difficult to be fermented and biotransformed, which is beneficial to improving the efficiency of subsequent biological treatment. The biological pond 7 is used for the preliminary biotransformation of the sludge polarity, further improving the efficiency of subsequent biological treatment.

[0021] Specifically, the aeration assembly 5 includes an aeration pump 9, a first air pipe 10, a plurality of aeration heads 11 and a return air pipe 12. The output end of the aeration pump 9 is connected to the input end of the first air pipe 10. The output end of the first air pipe 10 is provided with a plurality of aeration heads 11. The plurality of aeration heads 11 are located at the bottom of the aerobic fermentation zone 3. One input end of the aeration pump 9 is connected to the output end of the return air pipe 12. The input end of the return air pipe 12 extends above the sedimentation zone of the sedimentation tank plate 4. It further includes an oxygen supplement machine 13 and an air supply pipe 14. The output end of the oxygen supplement machine 13 is provided with the air supply pipe 14. The air supply pipe 14 is connected to one input end of the aeration pump 9.

[0022] The aeration pump 9 operates to output air or oxygen. The air or oxygen is transported through the first air pipe 10 and aerates the bottom of the aerobic fermentation zone 3 through the plurality of aeration heads 11. The excess air or oxygen above the sedimentation zone of the sedimentation tank plate 4 is extracted through the return air pipe 12 and refluxed to the aeration pump 9 to achieve the recycling of the excess air or oxygen. The insufficient part is supplemented through other input ends of the aeration pump 9. The oxygen supplement machine 13 is an oxygen generator or an ozone generator. The oxygen supplement machine 13 transports oxygen or ozone to one input end of the aeration pump 9 through the air supply pipe 14 to achieve different aeration effects. Embodiment 2

[0023] As Figures 7 to 10As shown, on the basis of Example 1, it also includes an auger pipe 25, a mud discharge port 26 and an auger blade 27. The auger pipe 25 is installed on the mud outlet of the fermentation box 1, and the auger pipe 25 is located outside the fermentation box 1. The mud discharge port 26 is provided on the side wall of the auger pipe 25 away from the fermentation box 1. The auger blade 27 is rotatably installed in the auger pipe 25, and the auger blade 27 extends into the bottom of the sedimentation tank plate 4; it also includes a sleeve 28, a sewage pipe 29 and a plurality of nozzles 30. The sleeve 28 is sleeved on the outer wall of the auger pipe 25, and a sewage chamber is provided between the sleeve 28 and the auger pipe 25. The part of the auger pipe 25 located in the sleeve 28 is provided with a plurality of water filtering holes. The auger blade 27 is a variable pitch spiral blade, and the pitch of the auger blade 27 gradually decreases from the sedimentation tank plate 4 to the outside. The input end of the sewage pipe 29 is connected to the sewage chamber, and a plurality of nozzles 30 are installed at the output end of the sewage pipe 29. The plurality of nozzles 30 are located in the passage below the sedimentation tank plate 4. In the second channel, multiple nozzles 30 are directed toward the aerobic fermentation area 3; the transfer trough 6 includes an upper guide trough 31, a middle guide trough 32, a lower guide trough 33, an upper gate 34, a middle gate 35 and a transmission assembly 36. The upper guide trough 31, the middle guide trough 32 and the lower guide trough 33 are stacked from top to bottom, and the upper guide trough 31, the middle guide trough 32 and the lower guide trough 33 are all tilted. The upper end of the upper guide trough 31 is located below the mud discharge port 26, and the upper end of the upper guide trough 31 and the upper end of the middle guide trough 32 are respectively set Opening one and opening two are arranged up and down, the upper gate plate 34 is rotatably installed in the opening one of the upper guide groove 31 through the rotating shaft one, and the upper gate plate 34 closes or opens the opening one, and the middle gate plate 35 is rotatably installed in the opening two of the middle guide groove 32 through the rotating shaft two, and the middle gate plate 35 closes or opens the opening two, the rotating shaft one of the upper gate plate 34 and the rotating shaft two of the middle gate plate 35 are connected by the transmission assembly 36, and the upper gate plate 34 and the middle gate plate 35 are not arranged in parallel.

[0024] The auger blades 27 are driven by a driving mechanism. When the auger blades 27 rotate, they push the sludge settled at the bottom of the sedimentation tank plate 4 toward the auger pipe 25 and discharge it to the transfer trough 6 through the sludge discharge port 26, thereby improving the sludge discharge efficiency. The variable pitch setting of the auger blades 27 causes the sludge entering the auger pipe 25 to be gradually compressed, thereby squeezing out the water, and the water enters the sewage chamber between the sleeve 28 and the auger pipe 25 through the filter holes. The sewage pump on the sewage pipe 29 is operated to transport the sewage through the sewage pipe 29 and spray it toward the aerobic fermentation area 3 through multiple nozzles 30, pushing the anaerobic fermentation sludge in channel two toward the aerobic fermentation area 3, thereby improving the sludge transfer efficiency and avoiding pollution caused by direct discharge of sewage.

[0025] Adjust the relative angle between the upper gate plate 34 and the middle gate plate 35 so that when the upper gate plate 34 rotates by an angle one to open the opening one of the upper guide groove 31, through the transmission of the transmission component 36, the middle gate plate 35 rotates by an angle two to close the opening two of the middle guide groove 32; when the upper gate plate 34 rotates by an angle three to open the opening one of the upper guide groove 31, through the transmission of the transmission component 36, the middle gate plate 35 rotates by an angle four to open the opening two of the middle guide groove 32; during operation, the sludge output from the sludge discharge port 26 falls onto the upper guide groove 31 and flows downward. When the opening one is closed, the sludge continues to flow downward along the upper guide groove 31. When the upper gate plate 34 rotates by an angle one to open the opening one of the upper guide groove 31, the sludge falls onto the middle guide groove 32 through the opening one and flows downward along the middle guide groove 32. When the upper gate plate 34 rotates by an angle three to open the opening one of the upper guide groove 31, the sludge falls onto the lower guide groove 33 through the opening one and the opening two and flows downward along the lower guide groove 33. In this way, by intermittently changing the angle of the upper gate plate 34, the sludge is evenly distributed on the upper guide groove 31, the middle guide groove 32, and the lower guide groove 33 to achieve multi-layer transportation, improving the efficiency of sludge drying. Further, the number of middle guide grooves 32 can be increased and the relative angles between the upper gate plate 34 and multiple middle gate plates 35 can be adjusted adaptively, thereby increasing the number of layers and the efficiency of sludge drying. Embodiment 3

[0026] As Figure 1 , Figure 2 , Figure 3 and Figure 11 shown, on the basis of Embodiment 2, the biological pond 7 includes a pond body 37, a biological net cage 38, an electrode one 39, a filter plate 40, and an electrode two 41. The output ends of the upper guide groove 31, the middle guide groove 32, and the lower guide groove 33 all extend into the input end of the pond body 37. The biological net cage 38 is installed in the pond body 37. Gaps are provided between the biological net cage 38 and the side wall and bottom of the pond body 37. The electrode one 39 is installed inside the electrode one 39. The filter plate 40 is installed at the output end of the pond body 37. The electrode two 41 is installed inside the filter plate 40. The input end of the sludge auger 8 is connected to the output end of the pond body 37; plants with heavy metal enrichment and animals such as earthworms and maggots that can degrade pollutants are provided in the biological net cage 38. After the sludge enters the pond body 37, it flows toward the sludge auger 8 through the gap between the biological net cage 38 and the pond body 37. During this process, the roots of the plants absorb heavy metal ions in the sludge and enrich them in the stems and leaves. The electrode one 39 is energized to form an electric field to attract heavy metal ions to gather inside the biological net cage 38, improving the efficiency of plant heavy metal ion enrichment. Similarly, the electrode two 41 is energized to form an electric field to attract anions, causing the anions to gather inside the filter plate 40. The filter plate 40 intercepts the sludge, realizing the preliminary enrichment separation of heavy metals in the sludge and preliminary biological treatment.

[0027] As Figures 1 to 11As shown in the figure, a sludge biological treatment system of the present invention, when working, first, sludge is input into the anaerobic fermentation zone 2 through the sludge inlet pipe. The sludge undergoes anaerobic fermentation in the anaerobic fermentation zone 2. The sludge that has undergone anaerobic fermentation at the bottom of the anaerobic fermentation zone 2 enters the bottom of the aerobic fermentation zone 3 through passage two. The sludge undergoes aerobic fermentation in the aerobic fermentation zone 3 of the sludge. The aeration assembly 5 aerates the bottom of the aerobic fermentation zone 3. The aeration agitates the sludge in the aerobic fermentation zone 3, improves the aerobic fermentation and oxidation speed, and makes the sludge particles mix with the bubbles to form agglomerates and float upward. The floating sludge agglomerates enter the precipitation zone inside the sedimentation tank plate 4 through passage one. Then, multiple thorns 16 pierce the bubbles in the agglomerates, causing the sludge particles to precipitate to the bottom of the sedimentation tank plate 4. The floating substances and other floating complexes in the sludge are salvaged and separated by the conveyor belt 19 and the push plate 20. When the auger blade 27 rotates, it pushes the sludge precipitated at the bottom of the sedimentation tank plate 4 towards the auger pipe 25 and discharges it to the transfer tank 6 through the sludge discharge port 26. During this process, the variable pitch setting of the auger blade 27 causes the sludge entering the auger pipe 25 to be gradually compressed, thereby squeezing out the moisture. The moisture enters the sewage chamber between the sleeve 28 and the auger pipe 25 through the filter holes. The sewage pump on the sewage pipeline 29 operates to transport the sewage through the sewage pipeline 29 and spray it into the aerobic fermentation zone 3 through multiple nozzles 30, pushing the anaerobically fermented sludge in passage two towards the aerobic fermentation zone 3. Then, the sludge discharged from the sludge discharge port 26 flows and is transported towards the biological pond 7 through the multi-layered transfer tank 6 and the moisture is evaporated. The relatively dry sludge enters the pool body 37. After the sludge enters the pool body 37, it flows towards the sludge discharge auger 8 through the gap between the biological net box 38 and the pool body 37. During this process, the roots of the plants absorb the heavy metal ions in the sludge and accumulate them in the stems and leaves. The electrode one 39 is energized to form an electric field to attract the heavy metal ions to gather inside the biological net box 38, improving the efficiency of the plants in enriching heavy metal ions. Similarly, the electrode two 41 is energized to form an electric field to attract anions, causing the anions to gather inside the filter plate 40. The filter plate 40 intercepts the sludge, realizing the preliminary enrichment separation and preliminary biological treatment of the heavy metals in the sludge. Finally, the sludge discharge auger 8 transports the sludge at the output end of the pool body 37 outwards.

[0028] The main functions achieved by the present invention are: 1. The integrated fermentation tank 1 is used to anaerobically ferment and aerobically ferment the sludge, with a faster and more sufficient fermentation speed; 2. It can initially separate the components that are difficult to be fermented, decomposed, and biologically transformed, which is beneficial to improving the efficiency of subsequent biological treatment; 3. The biological pond 7 is used to initially biologically transform the sludge polarity, further improving the efficiency of subsequent biological treatment; 4. The water level difference between the anaerobic zone and the aeration zone is used to drive the sludge flow, replacing the traditional pumping to reduce energy consumption; 5. The auger tube 25 and the auger blade 27 are used to squeeze the second sewage backwashing channel, forming a "dehydration-reuse" closed loop to reduce water resource consumption; 6. The first electrode 39 and the second electrode 41 are used to enrich heavy metals and anions step by step to improve the biological enrichment efficiency.

[0029] For a sludge biological treatment system of the present invention, its installation method, connection method or setting method are all common mechanical methods, and any implementation that can achieve its beneficial effects can be carried out; the fermentation tank 1, aeration component 5, biological tank 7, sludge discharge auger 8, aeration pump 9, first air pipe 10, aeration head 11, return air pipe 12, oxygen supplement machine 13, air supply pipe 14, first shaft 15, thorn needle 16, first roller 17, second roller 18, conveyor belt 19, push plate 20, sprocket shaft 21, second sprocket shaft 22, chain 23, scraper 24, auger tube 25, auger blade 27, sleeve 28, sewage pipeline 29, nozzle 30, transmission component 36, biological net box 38, first electrode 39, filter plate 40, second electrode 41 of the sludge biological treatment system of the present invention are purchased on the market. Those skilled in the art only need to install and operate according to the attached operation manual without the need for creative labor from those skilled in the art.

[0030] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sludge biological treatment system, comprising a fermentation tank (1), the interior of the fermentation tank (1) is provided with a fermentation chamber, and a sludge inlet pipe communicating with the fermentation chamber is installed at the upper left of the fermentation tank (1); characterized in that, It also includes an anaerobic fermentation area (2), an aerobic fermentation area (3), a sedimentation tank plate (4), an aeration assembly (5), a transfer tank (6), a biological pond (7), and a sludge discharge auger (8). The sedimentation tank plate (4) is V-shaped and is installed in the middle of the fermentation chamber of the fermentation tank (1). The upper left edge of the sedimentation tank plate (4) is connected to the top wall of the fermentation tank (1). A passage one is provided between the upper right edge of the sedimentation tank plate (4) and the bottom wall of the fermentation tank (1). A passage two is provided between the bottom of the sedimentation tank plate (4) and the bottom wall of the fermentation tank (1). The space between the left part of the sedimentation tank plate (4) and the left side wall of the fermentation tank (1) is the anaerobic fermentation area (2). The space between the right part of the sedimentation tank plate (4) and the right side wall of the fermentation tank (1) is the aerobic fermentation area (3). The anaerobic fermentation area (2) and the aerobic fermentation area (3) are connected by the passage two. The aerobic fermentation area (3) and the sedimentation tank plate (4) are connected by the passage one. The space inside the sedimentation tank plate (4) is the sedimentation area. An antifoaming assembly is provided at the upper part of the sedimentation area. The aeration assembly (5) is installed at the bottom of the aerobic fermentation area (3). A sludge outlet is installed on the fermentation tank (1), and the sludge outlet is communicated with the bottom of the sedimentation area of the sedimentation tank plate (4). The transfer tank (6) is installed outside the fermentation tank (1), and the input end of the transfer tank (6) is communicated with the sludge outlet of the fermentation tank (1). The lower end of the transfer tank (6) is connected to the input end of the biological pond (7). The transfer tank (6) is used to evaporate the moisture of the sludge. A biological conversion bed is provided in the biological pond (7), and the biological pond (7) is used for biological treatment of the sludge. The sludge discharge auger (8) is installed outside the biological pond (7), and the input end of the sludge discharge auger (8) is connected to the output end of the biological pond (7).

2. The sludge biological treatment system according to claim 1, characterized in that, The aeration assembly (5) includes an aeration pump (9), an air pipe one (10), a plurality of aeration heads (11), and a return air pipe (12). The output end of the aeration pump (9) is connected to the input end of the air pipe one (10). A plurality of aeration heads (11) are installed at the output end of the air pipe one (10). The plurality of aeration heads (11) are located at the bottom of the aerobic fermentation area (3). One input end of the aeration pump (9) is connected to the output end of the return air pipe (12). The input end of the return air pipe (12) extends above the sedimentation area of the sedimentation tank plate (4).

3. A sludge biological treatment system according to claim 2, characterized in that, It also includes an oxygen replenishing machine (13) and an air supply pipe (14). The output end of the oxygen replenishing machine (13) is installed with the air supply pipe (14), and the air supply pipe (14) is connected to one input end of the aeration pump (9).

4. A sludge biological treatment system according to claim 1, characterized in that, It also includes a shaft one (15) and a plurality of thorns (16). The shaft one (15) is rotatably installed inside the fermentation tank (1). The shaft one (15) is located above the sedimentation tank plate (4). The shaft one (15) is close to the passage one, and a plurality of thorns (16) are installed on the outer wall of the shaft one (15).

5. A sludge biological treatment system according to claim 1, characterized in that, It also includes a first roller (17), a second roller (18), a conveyor belt (19) and a plurality of push plates (20). The first roller (17) is rotatably installed outside the fermentation tank (1). The second roller (18) is rotatably installed in the fermentation chamber of the fermentation tank (1). The second roller (18) is located above the precipitation area of the precipitation tank plate (4). The conveyor belt (19) is sleeved on the first roller (17) and the second roller (18). A plurality of push plates (20) are evenly installed on the outer wall of the conveyor belt (19).

6. A sludge biological treatment system according to claim 1, characterized in that, It also includes a sprocket shaft (21), a second sprocket shaft (22), a chain (23) and a scraper (24). The sprocket shaft (21) and the second sprocket shaft (22) are rotatably installed in the fermentation chamber of the fermentation tank (1). The sprocket shaft (21) and the second sprocket shaft (22) are located at the top of the anaerobic fermentation area (2). Sprockets are installed on both the sprocket shaft (21) and the second sprocket shaft (22). The chain (23) is sleeved on the sprockets of the sprocket shaft (21) and the second sprocket shaft (22). The scraper (24) is installed on the outer wall of the chain (23).

7. A sludge biological treatment system according to claim 1, wherein It also includes an auger pipe (25), a sludge discharge port (26) and an auger blade (27). The auger pipe (25) is installed at the sludge outlet of the fermentation tank (1). The auger pipe (25) is located outside the fermentation tank (1). The sludge discharge port (26) is arranged on the side wall of the auger pipe (25) away from the fermentation tank (1). The auger blade (27) is rotatably installed in the auger pipe (25), and the auger blade (27) extends into the bottom of the precipitation tank plate (4).

8. A sludge biological treatment system according to claim 7, characterized in that, It also includes a sleeve (28), a sewage pipeline (29) and a plurality of spray heads (30). The sleeve (28) is sleeved on the outer wall of the auger pipe (25). A sewage chamber is arranged between the sleeve (28) and the auger pipe (25). A plurality of water filtering holes are arranged on the part of the auger pipe (25) located inside the sleeve (28). The auger blade (27) is a variable pitch spiral blade, and the pitch of the auger blade (27) gradually decreases from the precipitation tank plate (4) outwards. The input end of the sewage pipeline (29) is connected to the sewage chamber. A plurality of spray heads (30) are installed at the output end of the sewage pipeline (29). The plurality of spray heads (30) are located in the second channel below the precipitation tank plate (4). The plurality of spray heads (30) face the aerobic fermentation area (3).

9. A sludge biological treatment system according to claim 7, characterized in that, The transfer groove (6) includes an upper guide groove (31), a middle guide groove (32), a lower guide groove (33), an upper gate (34), a middle gate (35) and a transmission assembly (36). The upper guide groove (31), the middle guide groove (32) and the lower guide groove (33) are stacked from top to bottom. The upper guide groove (31), the middle guide groove (32) and the lower guide groove (33) are all inclined. The upper end of the upper guide groove (31) is located below the mud discharge port (26). The upper end of the upper guide groove (31) and the upper end of the middle guide groove (32) are respectively provided with an opening. The upper gate (34) is rotatably mounted in the opening one of the upper guide groove (31) via the rotating shaft one, and the upper gate (34) closes or opens the opening one. The middle gate (35) is rotatably mounted in the opening two of the middle guide groove (32) via the rotating shaft two, and the middle gate (35) closes or opens the opening two. The rotating shaft one of the upper gate (34) and the rotating shaft two of the middle gate (35) are connected by a transmission assembly (36), and the upper gate (34) and the middle gate (35) are not arranged in parallel.

10. A sludge biological treatment system according to claim 9, characterized in that, The biological pool (7) includes a pool body (37), a biological cage (38), an electrode 1 (39), a filter plate (40) and an electrode 2 (41). The output ends of the upper guide groove (31), the middle guide groove (32) and the lower guide groove (33) are all extended into the input end of the pool body (37). The biological cage (38) is installed in the pool body (37). Gaps are set between the biological cage (38) and the side walls and bottom of the pool body (37). The electrode 1 (39) is installed in the electrode 1 (39). The filter plate (40) is installed at the output end of the pool body (37). The electrode 2 (41) is installed on the inner side of the filter plate (40). The input end of the mud outlet auger (8) is connected to the output end of the pool body (37).

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