Urban manure efficient dehydration aerobic composting treatment system

Abstract

The utility model discloses an efficient dewatering and aerobic composting treatment system for urban manure residues, and relates to the technical field of environmental protection. The device comprises a sludge intermediate tank, a high-pressure diaphragm plate-and-frame filter press, a conveying mechanism, a mixing mechanism and a fermentation mechanism. The pretreated sludge enters the sludge intermediate tank through the first sludge inlet pipe, enters the second sludge inlet pipe through the first sludge outlet pipe and then enters the high-pressure diaphragm plate-and-frame filter press for solid-liquid separation and dehydration treatment, and filtrate generated by dehydration treatment is discharged through the first water outlet pipe; the dewatered sludge enters the mixing mechanism through the conveying mechanism to be mixed with auxiliary materials, and then the mixed sludge enters the fermentation mechanism to be fermented into materials. By adopting the technical scheme, the dehydration device has the advantages of efficiently dehydrating, reducing the mixed material adding amount and reducing the cost.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, specifically to a high-efficiency dehydration and aerobic composting system for urban sewage sludge. Background Technology

[0002] With the acceleration of urbanization, the production of urban sewage sludge has increased dramatically, becoming one of the most pressing environmental problems. Traditional treatment methods such as landfill and direct discharge not only consume a large amount of land resources but may also cause soil and groundwater pollution, and even affect human health through the food chain. Faced with this serious situation, exploring efficient and environmentally friendly urban sewage sludge treatment pathways to achieve its reduction, harmlessness, and resource utilization is particularly urgent and important.

[0003] Currently, urban sewage sludge treatment processes mainly include biological methods, chemical methods, physicochemical methods, and incineration. Biological methods offer advantages such as short treatment cycles, high efficiency, and environmental friendliness, making them the most commonly used method for treating urban sewage sludge. Currently disclosed treatment technologies include an aerobic high-temperature composting system for urban sewage sludge. Sludge is treated through a sludge removal and sand removal system to remove large particles and sand, then flows by gravity into a sludge storage tank. The sludge is then pumped from the storage tank to an intermediate sludge tank by a suction pump. A feed pump from the intermediate sludge tank presses the sludge into the screw press, where it is mixed with flocculant in a pressure pipeline (a mixer is installed). The resulting sludge cake after dewatering by the screw press is conveyed by a screw conveyor to a mixer and mixed with materials (return compost, sawdust) in a specific ratio to form compost raw materials. These materials are then fed into a fermentation chamber and evenly distributed within the chamber for fermentation. Finally, the fermented product is crushed, packaged, and stored.

[0004] However, this technical solution suffers from low dehydration efficiency and poor dehydration effect, with an average moisture content of 85%-90%, leading to a prolonged fermentation cycle and increased energy consumption. Furthermore, a large amount of auxiliary materials are required to achieve ideal fermentation conditions, increasing operating costs and potentially affecting the quality of the final product. Utility Model Content

[0005] The purpose of this utility model is to address the deficiencies and shortcomings of the existing technology by providing a high-efficiency dewatering and aerobic composting system for urban sewage sludge, which solves at least one of the above-mentioned technical problems and has the advantages of high-efficiency dewatering, reduced mixing and feeding amount and cost reduction.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a high-efficiency dewatering and aerobic composting system for urban sewage sludge, comprising:

[0007] The sludge intermediate tank is equipped with a first sludge inlet pipe and a first sludge outlet pipe. The pretreated sludge enters the sludge intermediate tank through the first sludge inlet pipe.

[0008] A high-pressure diaphragm plate and frame filter press is used to dewater sludge. The high-pressure diaphragm plate and frame filter press is equipped with a second sludge inlet pipe and a first sludge outlet pipe, the second sludge inlet pipe being connected to the first sludge outlet pipe; the first sludge outlet pipe is used to discharge the filtrate produced during the dewatering process.

[0009] A conveying mechanism, one end of which is connected to the high-pressure diaphragm plate and frame filter press;

[0010] A mixing mechanism, one end of which is connected to the end of the conveying mechanism away from the high-pressure diaphragm plate and frame filter press; the mixing mechanism is used to mix the dewatered sludge with auxiliary materials; and

[0011] A fermentation mechanism, one end of which is connected to the mixing mechanism, is used to ferment the mixed sludge into materials.

[0012] The present invention further includes: a plunger pump disposed between the sludge intermediate tank and the high-pressure diaphragm plate and frame filter press, for cooperating with the high-pressure diaphragm plate and frame filter press, wherein one end of the plunger pump is connected to the sludge intermediate tank and the other end is connected to the second sludge inlet pipe.

[0013] The present invention further includes the following: the conveying mechanism comprises: a scraper conveyor connected to the high-pressure diaphragm plate and frame filter press; a crusher connected to the output end of the scraper conveyor; a screw conveyor connected to the mixing mechanism; and a second sludge outlet pipe connected at one end to the crusher and at the other end to the screw conveyor.

[0014] The present invention further includes: a screening device connected to the fermentation mechanism for screening the material; a first conveying pipe connected at one end to the screening device and at the other end to the mixing mechanism; and a second conveying pipe connected at one end to the screening device and at the other end for outputting the material to the finished product packaging room for packaging and / or for transporting it out using a sludge transport vehicle; the first conveying pipe is used to return the screened material to the mixing mechanism.

[0015] The present invention further includes a mixing mechanism comprising a mixing conveyor connected to the second mud outlet pipe and the fermentation mechanism respectively, and an auxiliary material preparation component connected at one end to the mixing conveyor.

[0016] The present invention further includes the following: the fermentation mechanism includes a fermentation chamber, a first feed pipe with one end connected to the fermentation chamber and the other end connected to the mixing conveyor, and a first discharge pipe with one end connected to the fermentation chamber and the other end connected to the screening device.

[0017] The present invention is further provided that the fermentation chamber is a silo-type fermentation chamber.

[0018] The present invention further includes: a blower and an air delivery pipe with one end connected to the blower and the other end connected to the bottom of the fermentation chamber; the blower and the air delivery pipe are used in conjunction to supply oxygen to the interior of the fermentation chamber.

[0019] The present invention further includes: a receiving tank, an integrated slag and sand removal device, a sludge storage tank, and a synchronous suction pump connected at one end to the first sludge inlet pipe, which are connected in sequence; the sludge to be treated passes through the receiving tank and is then pretreated into sludge by the integrated slag and sand removal device, and the sludge enters the sludge storage tank. The synchronous suction pump transports the pretreated sludge from the sludge storage tank to the intermediate sludge tank.

[0020] The present invention further includes: a filtrate recycling tank connected to the first outlet pipe and a first inlet pipe connected at one end to the bottom of the receiving tank and at the other end to the filtrate recycling tank; the filtrate produced by the dehydration treatment is discharged into the filtrate recycling tank through the first outlet pipe, wherein a portion of the filtrate flows back to the first inlet pipe.

[0021] The beneficial effects of this utility model after adopting the above technical solution are as follows: In this utility model, urban sewage sludge is pretreated to become sludge. The sludge enters the intermediate sludge tank from the first sludge inlet pipe, and then enters the second sludge inlet pipe through the first sludge outlet pipe, and then enters the high-pressure diaphragm plate and frame filter press for solid-liquid separation and dewatering. The dewatered sludge is conveyed to the mixing mechanism, where it is mixed with the mixing material. The fermentation mechanism is connected to the mixing mechanism at one end, and the mixed sludge is fermented into material in the fermentation mechanism. The high-pressure diaphragm plate and frame filter press in this utility model uses low-pressure filtration and high-pressure pressing to perform solid-liquid separation and dewatering of sludge. The high-pressure diaphragm plate and frame filter press has high filtration accuracy and good dewatering effect. The sludge after treatment has low water content, which reduces the amount of mixing material added and shortens the fermentation cycle, further saving costs. In addition, this utility model also has the advantages of reducing the volume of treated urban sewage sludge, achieving harmlessness, high resource utilization efficiency, and meeting sanitary treatment standards. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 10. Septic tank truck; 20. Receiving tank; 30. Integrated slag and sand removal device; 40. Synchronous suction pump; 50. Sludge storage tank; 51. Sludge discharge pipe from sludge storage tank; 60. Sludge intermediate tank; 61. First sludge inlet pipe; 62. First sludge discharge pipe; 70. Sludge inlet pump; 80. Plunger pump; 90. Hydraulic station; 100. High-pressure diaphragm plate and frame filter press; 101. Second sludge inlet pipe; 102. First water outlet pipe; 103. Second sludge discharge pipe; 110. Scraper conveyor; 120. Crusher 130. Crusher; 140. Filtration liquid reuse tank; 150. Screw conveyor; 151. Auxiliary material preparation assembly; 160. Auxiliary material discharge pipe; 170. Screening device; 180. First conveying pipe; 192. Second conveying pipe; 100. Finished product packaging room; 191. Sludge transport vehicle; 192. Fermentation chamber; 200. First feed pipe; 201. First discharge pipe; 210. Blower; 220. Air conveying pipe; 230. Mixing conveyor; 220. First water inlet pipe; 230. Feed pipe for manure and sludge storage tank. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0027] This embodiment relates to a high-efficiency dewatering and aerobic composting system for urban sewage sludge, referring to... Figure 1The system includes: a receiving tank 20, an integrated slag and sand removal device 30, a sludge and manure storage tank 50, a synchronous suction pump 40, a sludge intermediate tank 60, a high-pressure diaphragm plate and frame filter press 100, a conveying mechanism, a mixing mechanism, a fermentation mechanism, a screening device, and a blower 200. The receiving tank 20, the integrated slag and sand removal device 30, the sludge and manure storage tank 50, and the synchronous suction pump 40 are connected in series. One end of the synchronous suction pump 40 is connected to the first sludge inlet pipe 61 of the sludge intermediate tank 60. The receiving tank 20 has a receiving port, and each municipal high-efficiency dewatering aerobic composting system for manure and manure has drainage channels around the receiving tank 20. In this embodiment, there are two receiving tanks 20, each with three receiving ports. One receiving tank 20 can connect to three external manure transport trucks, i.e., vacuum trucks 10. The receiving tank 20 is semi-underground and has a reinforced concrete structure. When the receiving inlet of the receiving tank 20 is connected to the unloading inlet of the external vacuum truck 10 via a receiving hose, untreated municipal sludge is discharged into the receiving tank 20, and the sewage in the sludge flows into the drainage channel, ensuring the hygiene of the area where the sludge is unloaded. The receiving tank 20 is connected to the integrated sludge and sand removal device 30, which is located in the fine screen chamber. Untreated municipal sludge flows by gravity from the receiving tank 20 into the integrated sludge and sand removal device 30 for pretreatment. The spiral screen in the integrated sludge and sand removal device 30 removes larger solid impurities from the sludge, while the sand removal spiral at the bottom removes sand. The screenings and sediment removed by the integrated sludge and sand removal device 30 are washed with high-pressure water and then discharged into a collection container by the screw press dewatering device in the high-efficiency dewatering aerobic composting treatment system for municipal sludge, and finally bagged and transported to a landfill for disposal. After pretreatment of the fecal residue, the remaining sludge flows by gravity into the fecal residue and sludge storage tank 50 through the feed pipe. In this embodiment, the fecal residue and sludge storage tank 50 is an underground reinforced concrete structure, capable of storing approximately three days' worth of fecal residue and sludge, thus serving as a sludge storage facility. In this embodiment, a submersible agitator and a level detector are installed inside the fecal residue and sludge storage tank 50. The synchronous suction pump 40 and the submersible agitator are automatically controlled based on the level. Simultaneously, the signal from the level detector is electrically connected to a control circuit board of the high-pressure diaphragm plate and frame filter press 100, which automatically controls the start and stop of the synchronous suction pump 40.

[0028] In this embodiment, refer to Figure 1 The synchronous suction pump 40 is installed in the fine screen, with one end connected to the fecal sludge storage tank 50, specifically the sludge outlet pipe of the fecal sludge storage tank 50, and the other end connected to the first sludge inlet pipe 61 of the sludge intermediate tank 60. It is used to transport the pretreated sludge from the fecal sludge storage tank 50 to the sludge intermediate tank 60, and has the advantages of stable operation, low noise and easy maintenance.

[0029] In this embodiment, the sludge intermediate tank 60 is equipped with a first sludge inlet pipe 61 and a first sludge outlet pipe 62. The pretreated sludge enters the sludge intermediate tank 60 through the first sludge inlet pipe 61, and the sludge intermediate tank 60 serves to balance the sludge flow rate. The high-pressure diaphragm plate and frame filter press 100 is equipped with a second sludge inlet pipe 101 and a first water outlet pipe 102 for discharging the filtrate produced during dewatering. The second sludge inlet pipe 101 is connected to the first sludge outlet pipe 62. Specifically, the city's efficient dewatering and aerobic composting system for fecal sludge also includes: a plunger pump 80 located between the sludge intermediate tank 60 and the high-pressure diaphragm plate and frame filter press 100, used to cooperate with the high-pressure diaphragm plate and frame filter press 100; and a sludge inlet pump 70 located between the sludge intermediate tank 60 and the plunger pump 80. One end of the sludge inlet pump 70 is connected to the sludge intermediate tank 60, and the other end is connected to the plunger pump 80. One end of the plunger pump 80 is connected to the sludge intermediate tank 60, and the other end is connected to the second sludge inlet pipe 101 installed on the high-pressure diaphragm plate and frame filter press 100. The sludge inlet pump 70 cooperates with the plunger pump 80 to press the sludge in the sludge intermediate tank 60 into the second sludge inlet pipe 101 of the high-pressure diaphragm plate and frame filter press 100, and the sludge and flocculant are mixed in the pressure pipe during the pressing process. A hydraulic station 90 is installed near the plunger pump 80 and the high-pressure diaphragm plate and frame filter press 100 to provide power to the plunger pump 80.

[0030] The plunger pump 80 provides the power and pressure required by the high-pressure diaphragm plate and frame filter press 100, ensuring its normal operation. The working principle of the plunger pump 80 is based on the piston movement of the plunger, which compresses the sludge and pushes it to the outlet, and then to the second sludge outlet pipe 103. The plunger pump 80 uses hydraulic pressure to push the piston, allowing the sludge to pass through the plunger of the high-pressure plunger pump 80 to start the compression and filtration work of the high-pressure diaphragm plate and frame filter press 100. The output flow rate of the plunger pump 80 depends on the main structural parameters and is independent of the discharge pressure and the physical and chemical properties of the conveyed medium, thus ensuring stable and reliable flow output. It also provides strong pressure support for the high-pressure diaphragm plate and frame filter press 100, and its output pressure is adjustable. The plunger pump 80 not only has good suction performance but also good self-priming performance, usually eliminating the need for priming before startup, simplifying the operation process. Furthermore, the plunger pump 80 has a compact design and small size, facilitating installation and use in limited spaces, improving the space utilization rate of the equipment.

[0031] In this embodiment, refer to Figure 1The sludge enters the high-pressure diaphragm plate and frame filter press 100 through the second sludge inlet pipe 101. The high-pressure diaphragm plate and frame filter press 100 performs solid-liquid separation and dewatering treatment on the sludge. After dewatering, the sludge forms a sludge cake, and the filtrate produced during dewatering is discharged through the first outlet pipe 102. Specifically, the high-pressure diaphragm plate and frame filter press 100 includes: filter plates connected to the first outlet pipe 102, filter frames arranged alternately with the filter plates to form a filter pressing chamber, filter cloth covering the filter plates, a diaphragm disposed between the filter plates and the filter cloth, and a pressing device; the filter pressing chamber is connected to the second sludge inlet pipe 101.

[0032] The high-pressure diaphragm plate and frame filter press 100 is mainly based on the solid-liquid separation filtration principle, combined with high-pressure extrusion technology, to achieve efficient solid-liquid separation and dewatering of sewage sludge. The feeding system of the high-pressure diaphragm plate and frame filter press 100, namely the plunger pump 80, evenly transports the sludge into the filter chamber, where the material begins preliminary filtration under the action of the filter cloth. Within the filter chamber formed by the closed filter plates, solid particles are trapped on the filter cloth to form a sludge cake, while the liquid passes through the filter cloth and is discharged through the first outlet pipe 102. After preliminary filtration, the matching pressing device drives the diaphragm to inflate, subjecting the sludge cake to high-pressure pressing. Under the action of the diaphragm, residual water in the sludge cake is further squeezed out and discharged through the filter cloth. After pressing, the control system of the high-pressure diaphragm plate and frame filter press 100 issues a command, the pressing device drives the filter plates to open, and the diaphragm retracts to its original position, causing the sludge cake to fall off the filter plates, completing the unloading process. The high-pressure diaphragm plate and frame filter press 100 employs a low-pressure filtration and high-pressure pressing method, enabling sludge to pass through the filter cloth more quickly, completing solid-liquid separation and dewatering. The high-pressure diaphragm plate and frame filter press 100 features high filtration accuracy, strong adaptability, and a high degree of automation, achieving efficient sludge dewatering and saving production time and costs. The high-pressure diaphragm plate and frame filter press 100 provides excellent dewatering results, producing sludge with low moisture content, reducing the amount of mixing materials required, shortening the fermentation cycle, and further saving overall system costs.

[0033] In this embodiment, the pressing device is a pressing water pump, which is mainly used in the pressing stage of the high-pressure diaphragm plate and frame filter press 100. By applying pressure to the filter chamber, it helps to remove residual water from the sludge. The pressing water pump delivers high-pressure water into the filter chamber, and through the gaps between the filter cloth, filter plate, and diaphragm plate, it presses the solid material to remove residual water. In addition, this system also includes: a filtrate recycling tank 130 connected to the first outlet pipe 102, and a first inlet pipe 220 connected at one end to the bottom of the receiving tank 20 and at the other end to the filtrate recycling tank 130. The filtrate produced by the dewatering treatment is discharged into the filtrate recycling tank 130 through the first outlet pipe 102. A portion of the filtrate flows back to the first inlet pipe 220 for backwashing the receiving tank 20 to clean the receiving tank 20 and prevent the sludge from settling and clogging the receiving tank 20; the other portion is discharged into the sewage treatment plant.

[0034] Reference Figure 1 The sludge cake after dewatering by the high-pressure diaphragm plate and frame filter press 100 is conveyed to the mixing mechanism via a conveying mechanism connected to the high-pressure diaphragm plate and frame filter press 100 at one end. The conveying mechanism includes: a scraper conveyor 110 connected to the high-pressure diaphragm plate and frame filter press 100; a crusher 120 connected to the output end of the scraper conveyor 110; a screw conveyor 140 connected to the mixing mechanism; and a second sludge outlet pipe 103 connected at one end to the crusher 120 and at the other end to the screw conveyor 140. The dewatered sludge cake is conveyed by the scraper conveyor 110 to the crusher 120 for crushing to reduce its volume. After crushing, the sludge cake is conveyed through the second sludge outlet pipe 103 to the screw conveyor 140, and then to the mixing mechanism at the end of the conveying mechanism away from the high-pressure diaphragm plate and frame filter press 100. The mixing mechanism is used to mix the dewatered sludge with auxiliary materials.

[0035] In this embodiment, the mixing mechanism includes a mixing conveyor 210 connected to the second mud discharge pipe 103 and the fermentation mechanism, and an auxiliary material preparation component 150 connected at one end to the mixing conveyor 210. To ensure the aerobic high-temperature composting fermentation effect, auxiliary materials must be added before the dewatered mud cake fermentation. The auxiliary materials used in this case mainly consist of two parts: recycled compost and sawdust. The auxiliary material preparation component 150 is equipped with an auxiliary material discharge pipe 151, a coarse material storage shed, a crushing room, and a finished auxiliary material storage silo. The auxiliary material crushing is divided into two stages, with one crusher in each stage. The first stage crushing requires crushing larger materials such as branches into intermediate materials with a particle size of less than 10cm. The second stage crushing requires crushing the 10cm intermediate materials into finished auxiliary materials with a particle size of 3-4cm. The finished auxiliary materials are transported to the mixing conveyor 210 by the auxiliary material discharge pipe 151. The purpose of mixing is to mix dewatered cement cake, recycle compost, and auxiliary materials such as sawdust in a certain proportion to achieve the process requirements of composting (moisture content, carbon-nitrogen ratio, porosity, etc.).

[0036] In this embodiment, one end of the fermentation mechanism is connected to the mixing mechanism for fermenting the mixed sludge into material. The fermentation mechanism includes: a fermentation chamber 190, a first feed pipe 191 connected at one end to the fermentation chamber 190 and at the other end to the mixing conveyor 210, and a first discharge pipe 192 connected at one end to the fermentation chamber 190 and at the other end to the screening device 160. The efficient dewatering aerobic composting treatment system for municipal sludge also includes: a screening device 160 connected to the fermentation mechanism for screening the material, a first conveying pipe 161 connected at one end to the screening device 160 and at the other end to the mixing mechanism, and a second conveying pipe 162 connected at one end to the screening device 160 and at the other end for outputting the material to the finished product packaging room 170 for packaging and / or for transportation using a sludge transport vehicle 180; the first conveying pipe 161 is used to return the screened material to the mixing conveyor 210 in the mixing mechanism. In this embodiment, the material output from the second conveying pipe is transported to the finished product packaging room 170 for packaging and storage, and then transported away using the sludge transport vehicle 180. In other embodiments, the material output from the second conveying pipe is either transported to the finished product packaging room 170 for packaging and storage, or transported away using the sludge transport vehicle 180.

[0037] The dewatered sludge conveyed by the screw conveyor 140, the sawdust and other adjusting materials delivered by the auxiliary material discharge pipe 151, and the return compost delivered by the screening device 160 and the first conveyor pipe 161 are all thoroughly mixed by the mixing conveyor 210 and then fed into the distribution system of the fermentation chamber 190 through the first feed pipe 191. The compost is evenly distributed within the chamber for fermentation. After fermentation, it enters the screening device 160 through the first discharge pipe 192 for screening. The purpose of finished product crushing and screening is to crush the composted material into smaller particles, facilitating the return of the composted material through the first conveyor pipe 161 and for packaging and storage through the first conveyor pipe 161. The purpose of packaging and storage is to package and store the material or transport it in bulk. The fermentation chamber 190 can be operated flexibly according to the actual production situation. By adopting a sequential batch operation mode, after completing one fermentation in the same fermentation chamber 190, the operating conditions of the fermentation chamber 190 can be controlled to continue the secondary fermentation process.

[0038] The city's efficient dehydration and aerobic composting system for manure sludge also includes: a blower 200 and an air supply pipe 201 connected at one end to the blower 200 and at the other end to the bottom of the fermentation chamber 190; the blower 200 and the air supply pipe 201 work together to supply oxygen to the inside of the fermentation chamber 190.

[0039] In this embodiment, the fermentation mechanism is a silo-type fermentation mechanism. The silo-type fermentation mechanism primarily utilizes aerobic microorganisms (such as bacteria and fungi) to conduct biochemical reactions on the organic waste in the manure sludge under sufficient oxygen conditions, thereby degrading it and transforming it into stable, harmless, and nutrient-rich humus. The manure sludge is fed into the fermentation chamber 190, where oxygen is supplied through forced ventilation or turning and stirring, allowing aerobic microorganisms to rapidly multiply and decompose organic matter under suitable temperature, humidity, and oxygen conditions. This stage generates a large amount of heat, causing the pile temperature to rise, typically reaching 55℃~70℃ or even higher. As the pile temperature rises, some non-degradable high-molecular-weight substances also decompose and transform, further promoting the mineralization and humification of organic matter. High temperatures also effectively kill pathogenic microorganisms in the compost. After the high-temperature stage, the pile temperature gradually decreases, at which point the activity of microorganisms slows down, but they continue to decompose the remaining organic matter. The main purpose of this stage is to stabilize the compost product. After composting, the product needs to be screened to remove residual impurities and harmful substances such as heavy metals. Then, it undergoes compaction, granulation, and packaging to obtain the final compost product. The characteristic of the silo-type fermentation mechanism is that the fermentation chamber 190 can operate flexibly according to the actual production situation. By adopting a sequencing batch fermentation method, after completing one fermentation in the same fermentation chamber 190, the operating conditions of the fermentation chamber 190 can be controlled to continue the secondary fermentation process. Each fermentation cycle is approximately 10 days, with the temperature controlled between 55℃ and 70℃.

[0040] Fermentation chamber 190 is a silo-type fermentation chamber. It is a single-layer cylindrical (or rectangular) chamber, typically 4-5 meters deep. Most are constructed of reinforced concrete. High-pressure centrifugal fans provide forced aeration within the fermentation chamber 190 to maintain aerobic fermentation. A blower 200 and air delivery pipe 201 provide the necessary air for fermentation; air generally enters the fermentation chamber 190 from the bottom, while compost material enters from the top. After 6-12 days of aerobic fermentation, the pre-composted compost is discharged from the bottom of the chamber via a discharge machine. A material spreader transports material from the silo into the fermentation chamber 190, and a auger located on the rotating layer agitates the waste within the chamber through its revolution and rotation. This operation prevents the formation of troughs, and the shape and arrangement of the auger ensures a consistently uniform air distribution. During the material spreading process, the spreader automatically adjusts according to preset parameters (such as spreading speed and thickness) to ensure the uniformity and stability of the material. The screw conveyor pushes the material from the bottom or side of the fermentation chamber 190 to the discharge port. During the pushing process, the rotation of the screw blades not only causes the material to move forward, but also causes friction and compression between the screw blades and the cylinder wall, thereby increasing the material's fluidity and discharge speed.

[0041] The beneficial effects of this utility model are roughly as follows: This urban sewage sludge high-efficiency dewatering and aerobic composting treatment system adopts an integrated slag and sand removal device 30, a high-pressure diaphragm plate and frame filter press 100, and a silo-type fermentation chamber 190, which can improve the dewatering effect and composting efficiency of the sewage sludge treatment system. When using this sewage sludge treatment system for sludge treatment, the integrated slag and sand removal device 30 has a high effect on removing screenings and grit. The integrated design reduces the equipment footprint and piping connections, improving treatment efficiency. The high-pressure diaphragm plate and frame filter press 100 adopts advanced diaphragm pressing technology, which can press the sludge under high pressure, so that the water in the sludge is efficiently squeezed out, reducing the sludge moisture content. The high-pressure diaphragm plate and frame filter press 100 is suitable for the treatment of various types of sludge and can adapt to different working conditions and material characteristics. The silo-type fermentation chamber 190 greatly increases the processing capacity, meeting the needs of large-scale sludge treatment. Compared to other fermentation devices, the silo-type fermentation chamber 190 occupies less space and utilizes mechanical equipment such as screw conveyors and high-pressure centrifuges to achieve automated operation and reduce manual intervention. Waste gas generated during fermentation is discharged through aeration pipes, preventing secondary pollution. Through aerobic fermentation, the organic matter in the sludge is decomposed into stable humus, achieving harmlessness and stabilization. The use of an integrated slag and sand removal device 30, a high-pressure diaphragm plate and frame filter press 100, and the silo-type fermentation chamber 190 technology for treating manure sludge significantly improves treatment efficiency and resource utilization, reduces operating costs, and meets environmental protection requirements.

[0042] The working process of this utility model is as follows: After being filtered by the integrated slag and sand removal device 30 to remove some screenings and grit, the manure sludge enters the manure sludge storage tank 50. A synchronous suction pump 40 pumps the sludge from the manure sludge storage tank 50 into the intermediate sludge tank 60. The sludge in the intermediate sludge tank 60 is then transported by a plunger pump 80 to a high-pressure diaphragm plate and frame dewatering machine for dewatering. The dewatered sludge cake, recycled compost, and auxiliary materials are mixed evenly in a certain proportion to meet the composting process requirements. Afterward, the mixture is conveyed by a mixing conveyor 210 into the fermentation unit. The filtrate after sludge dewatering is discharged into the filtrate reuse tank 130 and finally discharged into the wastewater treatment plant (located within the sanitary treatment plant) for further treatment. A blower 200 provides the oxygen required by the fermentation system, ensuring full fermentation of the compost and allowing the organic waste in the compost to undergo biochemical reactions, thereby degrading and transforming it into stable, harmless, and nutrient-rich humus. After full fermentation, the compost passes through a screening device 160, a first conveying pipe 161, and a second conveying pipe 162. A portion of the compost that is returned is mixed with the dehydrated mud cake and auxiliary materials and then enters the fermentation chamber 190. The remaining compost enters the finished product packaging room 170 for packaging and storage, and is transported out using sludge transport vehicles 180.

[0043] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A high-efficiency dewatering and aerobic composting system for urban sewage sludge, characterized in that, include: The sludge intermediate tank (60) is equipped with a first sludge inlet pipe (61) and a first sludge outlet pipe (62). The pretreated sludge enters the sludge intermediate tank (60) through the first sludge inlet pipe (61). A high-pressure diaphragm plate and frame filter press (100) is used to dewater sludge; the high-pressure diaphragm plate and frame filter press (100) is provided with a second sludge inlet pipe (101) and a first water outlet pipe (102), the second sludge inlet pipe (101) is connected to the first sludge outlet pipe (62); the first water outlet pipe (102) is used to discharge the filtrate produced by the dewatering process; A conveying mechanism, one end of which is connected to the high-pressure diaphragm plate and frame filter press (100); A mixing mechanism, one end of which is connected to the end of the conveying mechanism away from the high-pressure diaphragm plate and frame filter press (100); the mixing mechanism is used to mix the dewatered sludge with auxiliary materials; as well as A fermentation mechanism, one end of which is connected to the mixing mechanism, is used to ferment the mixed sludge into materials.

2. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 1, characterized in that, Also includes: A plunger pump (80) is installed between the sludge intermediate tank (60) and the high-pressure diaphragm plate and frame filter press (100) for use with the high-pressure diaphragm plate and frame filter press (100). One end of the plunger pump (80) is connected to the sludge intermediate tank (60), and the other end is connected to the second sludge inlet pipe (101).

3. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 1, characterized in that, The conveying mechanism includes: a scraper conveyor (110) connected to the high-pressure diaphragm plate and frame filter press (100), a crusher (120) connected to the output end of the scraper conveyor (110), a screw conveyor (140) connected to the mixing mechanism, and a second sludge outlet pipe (103) connected at one end to the crusher (120) and at the other end to the screw conveyor (140).

4. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 3, characterized in that, Also includes: The fermentation mechanism includes a screening device (160) for screening materials, a first conveying pipe (161) connected at one end to the screening device (160) and at the other end to the mixing mechanism, and a second conveying pipe (162) connected at one end to the screening device (160) and at the other end for outputting materials to the finished product packaging room (170) for packaging and storage and / or for transporting them using a sludge transport vehicle (180); the first conveying pipe (161) is used to return the screened materials to the mixing mechanism.

5. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 4, characterized in that, The mixing mechanism includes a mixing conveyor (210) connected to the second mud outlet pipe (103) and the fermentation mechanism respectively, and an auxiliary material preparation component (150) connected at one end to the mixing conveyor (210).

6. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 5, characterized in that, The fermentation mechanism includes: a fermentation chamber (190), a first feed pipe (191) connected at one end to the fermentation chamber (190) and at the other end to the mixing conveyor (210), and a first discharge pipe (192) connected at one end to the fermentation chamber (190) and at the other end to the screening device (160).

7. The efficient dewatering and aerobic composting system for urban sewage sludge according to claim 6, characterized in that, The fermentation chamber (190) is a silo-type fermentation chamber (190).

8. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 6, characterized in that, Also includes: A blower (200) and an air supply pipe (201) with one end connected to the blower (200) and the other end connected to the bottom of the fermentation chamber (190); the blower (200) and the air supply pipe (201) are used to supply oxygen to the inside of the fermentation chamber (190).

9. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 8, characterized in that, Also includes: The receiving tank (20), the slag and sand removal integrated device (30), the fecal sludge storage tank (50), and the synchronous suction pump (40) connected at one end to the first sludge inlet pipe (61) are connected in sequence. The fecal sludge to be treated passes through the receiving tank (20) and is then pretreated into sludge by the slag and sand removal integrated device (30). The sludge enters the fecal sludge storage tank (50), and the synchronous suction pump (40) transports the pretreated sludge from the fecal sludge storage tank (50) to the sludge intermediate tank (60).

10. The urban sewage sludge high-efficiency dewatering aerobic composting treatment system according to claim 9, characterized in that, Also includes: The filtrate recycling tank (130) is connected to the first outlet pipe (102), and the first inlet pipe (220) is connected to the bottom of the receiving tank (20) at one end and to the filtrate recycling tank (130) at the other end; the filtrate produced by the dehydration treatment is discharged into the filtrate recycling tank (130) through the first outlet pipe (102), and part of the filtrate flows back into the first inlet pipe (220).

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