Secondary rough filtration unit for washing and sweeping vehicle, rough filtration unit with secondary rough filtration unit, sewage treatment unit, sewage energy recovery system and washing and sweeping vehicle

Abstract

The invention relates to the field of cleaning and sweeping vehicles, in particular to a secondary rough filtration unit for a cleaning and sweeping vehicle, a rough filtration unit with the secondary rough filtration unit, a sewage treatment unit, a sewage energy recovery system and the cleaning and sweeping vehicle. The interior of the second-stage filter box is hollow to form a second-stage rough filtration inner cavity; a second-stage liquid outlet and a second-stage liquid inlet are formed in the second-stage filter box; a discharging groove is formed in the second-stage filter box; a rotary filter drum is arranged in the secondary filter box; the rotary filter cartridge is connected with a driving mechanism capable of driving the rotary filter cartridge to rotate; the secondary liquid inlet is communicated with the rotary filter cartridge; the rotary filter cartridge is communicated with the discharge chute; the secondary rough filtration unit disclosed by the invention can perform fine secondary screening on pre-filtered water liquid from the primary rough filtration unit, impurities with smaller particles are effectively removed, and cleaner inlet water is provided for a subsequent fine filtration unit, so that the treatment efficiency and the outlet water quality of the whole filtration system are improved.

Description

Technical Field

[0001] This invention relates to the field of sweeper trucks, specifically to a secondary coarse filtration unit for a sweeper truck, a coarse filtration unit having the secondary coarse filtration unit, a wastewater treatment unit, a wastewater energy recovery system, and a sweeper truck. Background Technology

[0002] Currently, a typical 18-ton pure electric sweeper truck on the market can operate continuously for about one hour with a full load of 8 tons of clean water. The chassis battery has a capacity of approximately 300 kWh, which can sustain operation for about 6 hours. When the clean water runs out, the vehicle needs to return to the parking lot to refill it; when the battery is depleted, it stops operating and returns to recharge. Therefore, the total effective operating time of an 18-ton pure electric sweeper truck is less than 4 hours.

[0003] Currently, the main ways to improve range are by increasing battery capacity and clean water tank volume. First, increasing battery capacity means a larger and heavier battery, which not only encroaches on the installation space of other systems on the sweeper, but the added weight also consumes extra power. Second, increasing the clean water tank volume will also take up considerable space, and the increase in clean water tank volume has little effect on increasing continuous operating time.

[0004] Therefore, to increase the working range of sweeper trucks, the conventional approach is to add a wastewater recycling function. Currently, the wastewater recycling function of sweeper trucks inevitably requires the use of a wastewater filtration device, which generally includes a coarse filter. Traditional coarse filters include fixed filter screens, vibrating screens, or static filter cartridges. Although these devices have a simple structure, the filter screen surface is easily covered and clogged by debris, leading to a rapid decrease in filtration efficiency, an increase in inlet water pressure, and even system shutdown.

[0005] Furthermore, traditional coarse filtration units are mostly single-stage filtration, with impurities of all sizes being handled by a single filter layer. This causes the filter layer to saturate quickly, requiring frequent cleaning or replacement, which increases equipment maintenance costs and downtime.

[0006] The existing patent CN 118257223 A discloses a suction device for a sweeper truck, a sweeper truck, and a method for operating a sweeper truck, but does not clearly disclose the technical content that solves the above-mentioned technical problems.

[0007] Therefore, in order to improve or solve at least one of the above technical problems, a filtration device is needed to assist in the recycling of wastewater from sweepers. Summary of the Invention

[0008] The purpose of this invention is to provide a secondary coarse filtration unit for sweepers and washers that has high screening efficiency and can avoid screen clogging.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A secondary coarse filtration unit for a sweeper truck includes a secondary filter box; the interior of the secondary filter box is hollow to form a secondary coarse filtration cavity; the secondary filter box is provided with a secondary liquid outlet and a secondary liquid inlet; the secondary filter box is provided with a discharge trough; a rotating filter cylinder is provided inside the secondary filter box; the rotating filter cylinder is connected to a drive mechanism capable of rotating the rotating filter cylinder; the secondary liquid inlet is connected to the rotating filter cylinder; the rotating filter cylinder is connected to the discharge trough.

[0011] The secondary coarse filter chamber is equipped with a partition baffle; the partition baffle divides the secondary coarse filter chamber into a first chamber and a second chamber; the rotating filter cartridge is arranged in the first chamber, and the drive mechanism is arranged in the second chamber; the drive mechanism includes a first motor connected to the secondary filter box; the first motor is connected to the rotating filter cartridge through a transmission unit.

[0012] The rotating filter cartridge includes multiple individual filter cartridges; each individual filter cartridge is arranged coaxially; adjacent individual filter cartridges have different inner diameters; and each individual filter cartridge is nested together in sequence.

[0013] Each of the individual filter cartridges is frustoconical; the smaller end of each individual filter cartridge is positioned close to the secondary outlet.

[0014] A coarse filtration unit includes two types of coarse filtration units; the two types of coarse filtration units include the secondary coarse filtration unit for the sweeper truck.

[0015] The second type of coarse filtration unit includes a first-stage coarse filtration unit.

[0016] The coarse filtration unit includes one type of coarse filtration unit.

[0017] A wastewater treatment unit includes a fine filtration unit, a pumping unit, and the coarse filtration unit; the coarse filtration unit can be connected to the fine filtration unit via the pumping unit; the first-type coarse filtration unit and / or the second-type coarse filtration unit are connected to the fine filtration unit.

[0018] A wastewater energy recovery system for a sweeper truck includes a power generation system and a wastewater treatment system; the power generation system includes a power generation diversion unit; the wastewater treatment system includes a wastewater treatment unit; the power generation diversion unit is connected to the wastewater treatment unit; the power generation diversion unit is capable of generating electricity and supplying recycled wastewater to the wastewater treatment unit; the power generation diversion unit is connected to a coarse filtration unit and / or a fine filtration unit; the power generation diversion unit can pass through a coarse filtration unit and a fine filtration unit.

[0019] A sweeper truck includes a cargo compartment; the cargo compartment includes a clean water tank and a garbage bin; the cargo compartment is equipped with a wastewater energy recovery system; the cargo compartment is connected to an air intake duct; the power generation and diversion unit of the wastewater energy recovery system is arranged opposite to the air intake duct.

[0020] The advantages of this invention are:

[0021] This invention discloses a two-stage coarse filtration unit for a sweeper truck, a coarse filtration unit having the two-stage coarse filtration unit, a sewage treatment unit, a sewage energy recovery system, and a sweeper truck.

[0022] The two-stage coarse filtration unit disclosed in this invention can perform fine secondary screening on the pre-filtered water from the first-stage coarse filtration unit, effectively removing smaller particles of impurities and providing cleaner influent for the subsequent fine filtration unit, thereby improving the overall filtration system's treatment efficiency and effluent quality. The rotating filter cartridge continuously rotates under the drive of a mechanism (such as a motor), avoiding the clogging problems common in traditional static filters and maintaining the continuity of the filtration process. The vibration generated during the operation of the drive mechanism is cleverly utilized to promote the movement of debris trapped inside the rotating filter cartridge towards the discharge trough, achieving automatic slag discharge, reducing the frequency of manual cleaning, and lowering maintenance costs. The rotating filter cartridge consists of multiple coaxially nested individual filter cartridges. Wastewater penetrates the outer filter cartridges step by step, starting from the innermost cartridge, with each layer intercepting debris of different size ranges, achieving multi-stage screening. This avoids the concentrated accumulation of impurities on a single filter layer, significantly reducing the load on a single layer, preventing rapid saturation of the filter cartridge, and extending the service life of the filter cartridge. Attached Figure Description

[0023] The following is a brief explanation of the content depicted in the various figures of this invention specification:

[0024] Figure 1 This is a cross-sectional view of the secondary coarse filtration unit in this invention.

[0025] Figure 2 This is a schematic diagram of the structure when the two-stage coarse filtration unit and the fine filtration unit are connected in this invention.

[0026] Figure 3 This is a schematic diagram of the structure when the water spray cleaning device, a type of coarse filter unit, and the power generation diversion unit provided by the present invention are connected.

[0027] Figure 4 This is an isometric view of the wastewater treatment system layout in this invention from a second perspective.

[0028] Figure 5 This is a schematic diagram of the wastewater energy recovery system of the present invention when it is arranged on a vehicle.

[0029] Figure 6 This is an isometric view of the wastewater treatment system layout in this invention from a first-person perspective.

[0030] Figure 7 This is a schematic diagram of the structure when the power generation diversion unit is connected to a type of coarse filter unit in this invention.

[0031] Figure 8This is a schematic diagram of the structure of a type of coarse filtration unit in this invention.

[0032] Figure 9 This is a schematic diagram of the structure of the fine filtration unit in this invention.

[0033] Figure 10 This is a schematic diagram of the structure when the fine filtration unit is connected to the disinfection and sterilization device in this invention.

[0034] Figure 11 This is an isometric view of the water spray cleaning device of the present invention;

[0035] Figure 12 This is an isometric view of the power generation diversion unit in this invention.

[0036] Figure 13 This is a cross-sectional view of the power generation diversion unit in this invention.

[0037] Figure 14 This is a schematic diagram of the structure of the fine filtration unit in this invention when it is installed on the garbage bin.

[0038] Figure 15 This is a schematic diagram of the structure of the fine filtration unit in this invention when the sealing cover is open. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0040] In this invention, the secondary coarse filtration unit 5 is mainly used to receive the water pumped from the primary coarse filtration unit 7 and perform secondary screening and filtration.

[0041] In addition, in this invention, the secondary coarse filtration unit 5 includes a secondary filter box 5.5; the secondary filter box 5.5 is hollow inside to form a secondary coarse filtration cavity; the secondary filter box 5.5 is provided with a secondary liquid outlet 5.1 and a secondary liquid inlet; the secondary filter box 5.5 is provided with a discharge trough; a rotating filter cylinder is provided inside the secondary filter box 5.5; the rotating filter cylinder is connected to a drive mechanism that can drive the rotating filter cylinder to rotate; the secondary liquid inlet is connected to the rotating filter cylinder; the rotating filter cylinder is connected to the discharge trough; in this invention, the secondary filter box 5.5 is the main shell of the secondary coarse filtration unit 5, and its internal "secondary coarse filtration cavity" provides a closed space for the entire filtration process.

[0042] The "secondary inlet" and "secondary outlet" on the secondary filter box 5.5 clearly define the input (from the primary coarse filter) and output (to the fine filter unit 6) paths of the wastewater.

[0043] The rotating filter cartridge is a cylindrical screen that can be rotated by a power source; wastewater is directly fed into the interior of this rotating filter cartridge from the "secondary inlet".

[0044] The drive mechanism can drive the rotating filter cartridge to rotate; at the same time, the drive mechanism generally includes a motor, and the motor will inevitably generate vibration when it runs. This invention can also use the vibration of the motor to achieve the discharge of impurities inside the rotating filter cartridge.

[0045] In addition, in this invention, the unloading trough is equivalent to a waste outlet; the unloading trough is the outlet from which the filtered solid waste (filter residue) leaves the rotating filter cylinder or secondary filter box 5.5; the rotating filter cylinder disclosed in this invention is a cover structure with one end closed and the other end open, and the unloading trough is connected to the opening of the rotating filter cylinder to facilitate subsequent slag discharge operations.

[0046] Furthermore, in this invention, a partition baffle 501 is provided inside the secondary coarse filter cavity 5.61; the partition baffle 501 divides the secondary coarse filter cavity 5.61 into a first chamber and a second chamber 5.6; the rotating filter cartridge is arranged in the first chamber, and the drive mechanism is arranged in the second chamber 5.6; the partition baffle 501 plays a good role in isolation, preventing the filtered water from affecting the normal use of the drive mechanism; at the same time, in order to facilitate the normal flow of water, the partition baffle 501 is required to be provided with holes or the partition baffle 501 and the inner wall of the secondary coarse filter cavity 5.61 have gaps or intervals, so as to facilitate the flow of water from the first chamber to the second chamber 5.6.

[0047] In this invention, the secondary outlet 5.1 is located at the outlet of the second chamber 5.6 to facilitate the discharge of water entering the second chamber 5.6.

[0048] In this invention, the driving mechanism includes a first motor connected to the secondary filter box 5.5; the first motor is connected to the rotating filter cylinder through a transmission unit; the transmission unit can be a chain, gear or belt, mainly to realize the rotation control of the rotating filter cylinder by the first motor; in this invention, both ends of the rotating filter cylinder are required to be connected to the secondary filter box 5.5 or the partition baffle 501 through rotating parts; the end of the rotating filter cylinder can be provided with a rotating shaft, which is connected to the adjacent component with a bearing unit.

[0049] In this invention, the rotating filter cartridge comprises multiple individual filter cartridges; each individual filter cartridge is coaxially arranged; adjacent individual filter cartridges have different inner diameters; each individual filter cartridge is nested sequentially; in this invention, the rotating filter cartridge is essentially a composite filter cartridge; in actual use, the individual filter cartridges all rotate around the same central axis; when the individual filter cartridges in the rotating filter cartridge are nested together, the inner diameters of adjacent individual filter cartridges are different; when each individual filter cartridge is nested sequentially, the rotating filter cartridge disclosed in this invention has a nesting-like structure; the above nesting design can achieve graded filtration and progressive load reduction; when wastewater enters the innermost individual filter cartridge from the secondary inlet, the largest impurities are first intercepted; subsequently, the filtered water penetrates the first layer and enters the second individual filter cartridge with a smaller inner diameter, intercepting impurities of the corresponding size range again, and so on; thus achieving multi-stage screening filtration.

[0050] In this invention, by using multiple individual filter cartridges, impurities are dispersed across multiple filtration levels, rather than accumulating entirely on a single filter layer; this fundamentally avoids the "rapid saturation" problem of a single filter cartridge.

[0051] To facilitate the arrangement and subsequent installation of the rotating filter cartridges, each individual filter cartridge must have the same or similar length or height. This means that the ends of each individual filter cartridge are shared or flush, and each individual filter cartridge can be designed as a frustum-shaped structure with flush ends and filter holes in the middle. In this invention, each individual filter cartridge is a funnel-shaped structure to reduce water spillage. This invention requires that the end of the individual filter cartridge near the secondary outlet 5.1 be closed. After the supply pipe is inserted into the rotating filter cartridge, the water can be directly sprayed onto the end of the individual filter cartridge, ensuring that the water filtration path includes at least the length of the individual filter cartridge, thus optimizing the filtration effect.

[0052] In this invention, the specific structure of the individual filter cartridge is as follows: The individual filter cartridge includes a filter cartridge body, and the filter cartridge body is provided with an inner cavity groove; the depth of the inner cavity groove is less than the axial length of the filter cartridge body, and multiple filter holes are provided on the side of the filter cartridge body; in order to facilitate the discharge of impurities in each individual filter cartridge, a discharge hole can be opened at the end of the individual filter cartridge near the secondary liquid inlet, and the discharge hole is required to be connected to the discharge trough to facilitate the discharge of impurities in the rotating filter cartridge.

[0053] The end of the individual filter cartridge near the secondary outlet 5.1 is a solid structure, and it is generally connected to the drive mechanism via a rotating shaft; the other end of the individual filter cartridge can be externally connected to a bracket or a connecting plate with a bearing mechanism, so that the rotating filter cartridge can be suspended on the secondary filter box 5.5.

[0054] In this invention, each individual filter cartridge is frustoconical; the smaller end of the individual filter cartridge is positioned closer to the secondary outlet 5.1; the frustoconical shape means that when the individual filter cartridge rotates, the solid debris trapped on its inner wall is not only subjected to centrifugal force, but also generates an axial force due to the conical inclined surface of the cartridge wall; this force continuously pushes the debris from the smaller diameter end of the filter cartridge to the larger diameter end.

[0055] The wastewater energy recovery system for sweeper trucks disclosed in this invention mainly includes a power generation system and a wastewater treatment system. In this invention, the power generation system is mainly used to recover energy when the sweeper truck recovers wastewater and garbage. The wastewater treatment system is mainly used to further treat the recovered wastewater to increase the driving range of the sweeper truck's washing and sweeping water.

[0056] In this invention, the power generation system includes a power generation diversion unit 3; the power generation diversion unit 3 is capable of generating electricity and supplying recycled wastewater to the wastewater treatment unit; in this invention, the wastewater treatment system includes a wastewater treatment unit, which is used to purify the recycled wastewater. In this invention, the power generation diversion unit 3 is connected to the wastewater treatment unit; based on this design, the wastewater collected by the power generation diversion unit 3 can enter the wastewater treatment unit.

[0057] In this invention, the wastewater treatment unit includes a coarse filtration unit, a fine filtration unit 6, and a pumping unit. The coarse filtration unit is mainly used for the initial screening of wastewater entering the carriage, and the fine filtration unit 6 is mainly used for the further purification of wastewater after filtration by the coarse filtration unit. In this invention, the pumping unit is mainly used for the transfer of water in the wastewater energy recovery system.

[0058] In addition, the core of the power generation system in this invention is the power generation diversion unit 3, which is used to recover the kinetic energy of sewage and garbage during the operation of the sweeper and convert it into electrical energy, while guiding the sewage to the sewage treatment system.

[0059] The wastewater treatment system includes a coarse filtration unit, a fine filtration unit 6, and a pumping unit 9. It performs multi-stage purification treatment on the recovered wastewater, so that the water can be reused for washing and cleaning operations, reducing the consumption of clean water and extending the driving range.

[0060] The two systems are integrated through pipes and connectors to achieve closed-loop management of wastewater from recycling to purification.

[0061] In this invention, the power generation diversion unit 3 is connected to the coarse filtration unit and / or the fine filtration unit 6; the coarse filtration unit can be connected to the fine filtration unit 6 through the pumping unit 9; based on the above design, the power generation diversion unit 3 can be directly connected to the coarse filtration unit or the fine filtration unit 6; or it can be connected to both the coarse filtration unit and the fine filtration unit 6 at the same time. Based on this design, theoretically, wastewater purification can be achieved, but the difference lies in the difference in purification capacity.

[0062] In this invention, the power generation diversion unit 3 is connected to the coarse filtration unit and the fine filtration unit 6, so that the wastewater collected by the power generation diversion unit 3 undergoes at least two purification processes, which can ensure the degree of wastewater purification to a greater extent. Of course, this does not mean that the power generation diversion unit 3 cannot be directly connected to the coarse filtration unit or the fine filtration unit 6. Direct connection is also possible, but the difference is that multi-stage filtration cannot be achieved, which may result in a large load on the fine filtration unit 6. This arrangement can improve purification efficiency, reduce the wastewater flow path, and optimize wastewater purification efficiency.

[0063] In this invention, the coarse filtration unit includes a first-class coarse filtration unit 4 and / or a second-class coarse filtration unit. The first-class coarse filtration unit 4 and the second-class coarse filtration unit are mainly used for preliminary filtration. The second-class coarse filtration unit is connected to the garbage bin 1 in the vehicle compartment. The sewage in the garbage bin 1 is initially filtered through the second-class coarse filtration unit. The first-class coarse filtration unit 4 is mainly connected to the power generation diversion unit 3, with the purpose of achieving preliminary filtration of sewage collected by the power generation diversion unit 3.

[0064] In this invention, the power generation diversion unit 3 can be connected to the fine filter unit 6 via a coarse filter unit 4; the coarse filter unit 4 and / or the second coarse filter unit can be connected to the fine filter unit 6; based on this design, the sewage collected in the carriage has two filtration and purification routes, thus optimizing the sewage purification efficiency.

[0065] In this invention, the second-class coarse filtration unit includes a primary coarse filtration unit 7 and / or a secondary coarse filtration unit 5; the primary coarse filtration unit 7 and / or the secondary coarse filtration unit 5 of this invention can realize that the second-class coarse filtration unit has two-stage purification capabilities; in this invention, the primary coarse filtration unit 7 and / or the secondary coarse filtration unit 5 are connected to the fine filtration unit 6; in this invention, the primary coarse filtration unit 7 is generally connected to the fine filtration unit 6 through the secondary coarse filtration unit 5. This arrangement allows the sewage from the garbage bin 1 to enter the fine filtration unit 6 after two filtrations.

[0066] Based on the above design, this invention can reduce or prevent excessively large debris from entering the fine filter unit 6 in the trash can 1; and reduce the filtration load on the secondary coarse filter unit 5 and the fine filter unit 6.

[0067] Of course, if there is little sewage and debris in the garbage bin 1, and the filtration load of the fine filter unit 6 is not considered, the primary coarse filter unit 7 can be directly connected to the fine filter unit 6.

[0068] Based on the above, it can be understood that the wastewater energy recovery system disclosed in this invention mainly has two purification paths:

[0069] Path 1: Sewage and garbage are collected through the air intake duct 2 on the carriage, and then the sewage is collected and generated through the power generation diversion unit 3. The power generation diversion unit 3 is connected to the first type of coarse filter unit 4, and the first type of coarse filter unit 4 is connected to the fine filter unit 6.

[0070] Route 2: Sewage and garbage are collected through the air intake duct 2 on the carriage; sewage and garbage enter garbage bin 1; water in garbage bin 1 enters the primary coarse filter unit 7, the primary coarse filter unit 7 is connected to the secondary coarse filter unit 5, and the secondary coarse filter unit 5 is connected to the fine filter unit 6.

[0071] In this invention, the power generation diversion unit 3 includes a power generation frame; the power generation frame is the external main structure of the power generation diversion unit 3, which mainly plays a good protective and diversion role, and also facilitates the installation of the power generation diversion unit 3 on the carriage.

[0072] In addition, a power generation mechanism is provided on the power generation frame of the present invention; the power generation mechanism includes a generator 3.4 and a rotating blade 3.3; in the present invention, the air inlet duct 2 carries sewage and garbage into the garbage bin 1 and blows it upward toward the power generation mechanism; the wind drives the rotating blade 3.3 to rotate, and at the same time drives the generator 3.4 to generate electricity; the generated electrical energy can be stored in the power battery to power the vehicle's power system, and can also drive the sewage treatment unit and various water pumps to work; thus, the wind energy is converted into electrical energy, realizing the effective recovery and utilization of energy.

[0073] In addition, the power generation diversion unit 3 of this invention is arranged opposite to the air inlet duct 2. The power generation diversion unit 3 of this invention also plays a good role in isolation and protection, avoiding the problem of needing to install rubber pads on the top of the traditional vehicle body to buffer the impact. Because the outlet of the air inlet duct 2 inside the sweeper is generally too close to the top plate of the sweeper, the wind carries sewage and continuously impacts the top plate, which conventionally requires the installation of rubber plates to mitigate the impact. With the setting of the power generation diversion unit 3, this invention can avoid the need to install additional rubber pads and at the same time avoid the impact on the top of the vehicle body.

[0074] This invention replaces the rubber sheet with a power generation diversion unit 3 to recover and utilize wind energy. This not only reduces the impact of the wind ejected from the air intake duct 2 on the roof but also recovers and reuses the ejected wind energy, converting the destructive wind energy into electrical energy. Simultaneously, it can recover wastewater injected into the air intake duct 2, solving the problem that the clean water capacity cannot meet the needs of long-term operation of pure electric sweeper trucks.

[0075] In this invention, the power generation frame includes a lateral frame 301, one end of which is provided with an annular waterway 3.7 for collecting sewage; the generator 3.4 is arranged at the end of the lateral frame 301 away from the annular waterway 3.7; the annular waterway 3.7 is connected to the coarse filter unit in the sewage treatment unit; the annular waterway 3.7 is mainly used to collect the water liquid thrown out by centrifugation by the rotating fan blades; it is also used to collect the water liquid collected by the water intake panel 3.9, the basic purpose of which is to realize the recycling and collection of some sewage.

[0076] In this invention, the annular waterway 3.7 is distributed in a ring shape and has an opening on at least the inner side, so that when the rotating blade 3.3 rotates, the water thrown out by the rotating blade 3.3 can enter the annular waterway 3.7, thereby realizing the collection of some sewage water.

[0077] In this invention, the annular waterway 3.7 is connected to the coarse filtration unit, generally to a type of coarse filtration unit 4. Based on this design, it is convenient for the water collected by the annular waterway 3.7 to enter the type of coarse filtration unit 4.

[0078] In this invention, the annular water channel 3.7 is provided with a first water channel inlet on the side near the rotating blade 3.3. The first water channel inlet facilitates the entry of water into the annular water channel 3.7. At the same time, the annular filter screen 3.5 is provided at the first water channel inlet. The annular filter screen 3.5 plays a primary filtration role, reducing or preventing impurities from entering the annular water channel 3.7.

[0079] In this invention, a fan blade protective cover 3.6 is provided at the end of the lateral frame 301; the fan blade protective cover 3.6 is provided with mesh through holes; the mesh through holes facilitate the airflow and water liquid to pass through the fan blade protective cover 3.6; and the fan blade protective cover 3.6 plays a good blocking and protective role, preventing excessively large debris from passing through the fan blade protective cover 3.6 and damaging the rotating blade 3.3.

[0080] In this invention, the fan blade protective cover 3.6 is arranged at one end of the power generation frame near the annular water channel 3.7; the outer side of the fan blade protective cover 3.6 is arc-shaped; based on this design, the fan blade protective cover 3.6 is raised near the air inlet duct 2, which plays a good guiding role and makes it easy for garbage to pass over the fan blade protective cover 3.6.

[0081] In this invention, the power generation diversion unit 3 also includes a water-drawing mechanism; in this invention, the water-drawing mechanism plays a good blocking and protective role; at the same time, some sewage is absorbed by the water-drawing panel 3.9 and, under the action of gravity, flows along the water-drawing panel 3.9 to the center, and then enters the annular waterway 3.7 along the water guide channel 3.8.

[0082] In this invention, the water-drawing mechanism includes a water-drawing panel 3.9 connected to the side frame 301; the water-drawing panel 3.9 is arranged on the side frame 301 close to the generator 3.4; the water-drawing panel 3.9 is arranged in the area between the generator 3.4 and the rotating blade 3.3; the water-drawing panel 3.9 plays a good blocking role to prevent water or garbage from affecting the use of the generator 3.4.

[0083] In this invention, the water intake panel 3.9 is an arc-shaped plate, and the water intake panel 3.9 protrudes towards the rotating blade 3.3. Based on this design, the water intake panel 3.9 is convex, which plays a good guiding role. The water intake panel 3.9 of this invention can play a physical isolation role, which can directly block sewage droplets, sludge particles and garbage (such as plastic pieces and small paper scraps) that may splash backward due to the rotation of the rotating blade 3.3, fundamentally cutting off the path of garbage or liquid directly impacting the generator 3.4.

[0084] The successful blocking of the water intake panel 3.9 effectively prevents electrical short circuits, insulation failures, and rapid corrosion of metal parts caused by sewage, greatly improving the reliability and service life of the generator 3.4.

[0085] In this invention, the water intake panel 3.9 adopts an arc-shaped design; the arc-shaped water intake panel 3.9 has efficient flow guidance and changes the projection path.

[0086] When a water droplet or particle hits a flat surface at high speed, it may bounce and splash in all directions, or even bypass the edge of the surface and reach the back.

[0087] When it impacts a convex, curved surface facing it, the curve guides it along the tangential direction, altering its trajectory. This causes the vast majority of the splash to be directed to the sides and periphery, rather than scattering randomly.

[0088] Compared to flat surfaces, streamlined curved surfaces offer less resistance to the water-air mixture; this helps reduce turbulence and energy loss.

[0089] In addition, the curved design of the 3.9 water-drawing panel allows for a larger outer surface area, increasing the contact area with the water and facilitating the collection of spilled water.

[0090] In addition, the 3.9 arc-shaped surface of the water-drawing panel makes it easier for water to adhere to it and form a water film. Under the action of gravity, the water film will gather and drip down along the arc surface to its lowest point.

[0091] This creates ideal conditions for subsequent collaborative work with the diversion mechanism, ensuring that the blocked water can be effectively collected and returned to the annular waterway 3.7, achieving a perfect combination of "blocking" and "dredging".

[0092] In this invention, a flow guiding mechanism is also provided on the lateral frame 301. The flow guiding mechanism includes at least one flow guiding plate, and the flow guiding plate is provided with a flow guiding groove. The flow guiding groove is connected to the annular water channel 3.7. The water dripping on the water-absorbing panel 3.9 can enter the annular water channel 3.7 through the flow guiding groove. The flow guiding mechanism plays a good role in guiding the flow, making it convenient for the water on the water-absorbing panel 3.9 to enter the annular water channel 3.7, thereby realizing the collection of sewage water.

[0093] In this invention, multiple guide plates are generally provided, such as 3 or 6. While the guide plates of this invention serve as guide plates, they also provide good support and reinforcement, which helps to ensure the structural strength of the power generation frame. The guide channel is a channel provided on the guide plate for diverting water, which facilitates the collection of water on the water intake panel 3.9 and constrains it to enter the annular waterway 3.7.

[0094] In this invention, the flow guiding mechanism also includes a central flow guiding disk 3.41, which is connected to the central shaft of the generator 3.4. The water intake panel 3.9 is connected to each flow guiding plate through the central flow guiding disk 3.41. In this invention, the central flow guiding disk 3.41 acts as a connector, physically connecting the arc-shaped water intake panel 3.9 and all radially distributed flow guiding plates together to form a rigid, integrated composite structure. This facilitates the connection between the flow guiding mechanism and the water intake panel 3.9, and also facilitates subsequent flow diversion operations. In this invention, the central flow guiding disk 3.41 is provided with a through hole, which facilitates the connection of the shaft between the generator 3.4 and the rotating blade 3.3.

[0095] In this invention, the annular waterway 3.7 in the power generation frame is connected to a cleaning water pipe 3.1; the cleaning water pipe 3.1 is equipped with a control valve; the cleaning water pipe 3.1 is connected to the annular waterway 3.7; in this invention, the cleaning water pipe 3.1 is an external water supply pipe, which can be supplied with water by the spray cleaning device 10 to supply clean water into the annular waterway 3.7 and realize the cleaning operation of one channel of the sewage treatment unit.

[0096] In this invention, a type of coarse filtration unit 4 includes a type of coarse filter box 4.2; the interior of the type of coarse filter box 4.2 is hollow, forming a primary coarse filtration cavity 4.3; the type of coarse filter box 4.2 is provided with a type of inlet and a type of outlet; a type of filter screen 4.1 is provided inside the primary coarse filtration cavity 4.3; the type of coarse filter box 4.2 is essentially a hollow box structure, mainly used for screening sewage and impurities, and at the same time facilitating the collection and retention of the screened liquid; the type of inlet is used to connect to the power generation diversion unit 3; to facilitate the sewage discharged from the power generation diversion unit 3 into the type of coarse filter box 4.2; and to directly connect to the annular waterway 3.7 in the upstream power generation diversion unit 3 to receive the sewage to be treated; the type of outlet is the liquid outlet, connected to the next stage of treatment equipment (such as the fine filtration unit 6); the type of filter screen 4.1 is arranged in the primary coarse filtration cavity 4.3 as a physical barrier, and its pore size is designed to intercept larger solid impurities in the sewage, while allowing water and fine particles to pass through. In this invention, a type of filter screen 4.1 undertakes the core primary filtration mission, with the primary task of screening and another function being to protect downstream equipment; the type of coarse filter unit 4 disclosed in this invention is essentially a box-type structure; the type of coarse filter unit 4 can provide a buffer between the incoming water (from the power generation unit) and the outgoing water (to the next level unit), making the water flow more stable and contributing to the continuous and stable operation of the entire sewage treatment system.

[0097] In this invention, the first type of filter screen 4.1 is arranged at an angle. Based on this design, the basic function of the first type of filter screen 4.1 is for solid-liquid separation. The angled arrangement of the first type of filter screen 4.1 allows for the discharge of debris from the first type of filter screen 4.1 into the garbage bin 1 in the vehicle compartment under the influence of gravity after the first type of coarse filter unit 4.2 is connected inside the vehicle. To facilitate the discharge of solid debris from the first type of filter screen 4.1, a filter media opening is provided on the side of the first type of coarse filter box 4.2. The solid debris from the first type of filter screen 4.1 can be discharged from the first type of coarse filter box 4.2 through the filter media opening. In this invention, a liquid inlet is located at the upper end of the first type of coarse filter box 4.2, and a liquid outlet is located at the lower end of the first type of coarse filter box 4.2. This arrangement facilitates the liquid inlet, liquid outlet, and sieving operations of the first type of coarse filter unit 4.

[0098] In this invention, the primary coarse filtration unit 7 includes a sewage storage tank 7.3 disposed inside the garbage bin 1; the sewage storage tank 7.3 is connected to the inner cavity of the garbage bin 1; sewage in the inner cavity of the garbage bin 1 can enter the sewage storage tank 7.3 through the primary first filter plate 7.1; the sewage storage tank 7.3 is mainly arranged at the rear of the vehicle, that is, the rear of the garbage bin 1, and the primary first filter plate 7.1 is provided on the sewage storage tank 7.3; here the primary first filter plate 7.1 is equivalent to a sewer manhole cover, mainly playing a preliminary screening role to prevent larger garbage in the garbage bin 1 from entering the sewage storage tank 7.3.

[0099] In this invention, a first-stage second filter plate 7.2 is also provided inside the sewage storage tank 7.3; the first-stage second filter plate 7.2 and the sewage storage tank 7.3 form a first-stage purification cavity; in this invention, the second filter plate acts as a second-stage filter, and generally the filter holes of the second filter plate are smaller than those of the first filter plate.

[0100] Furthermore, in this invention, the primary purification chamber and the primary first filter plate 7.1 are staggered; the horizontal projections of the primary purification chamber and the primary first filter plate 7.1 do not coincide. This arrangement ensures that the size of impurities in the water within the primary purification chamber is smaller than that in other areas of the wastewater storage tank 7.3. During subsequent pumping, the water in the primary purification chamber is primarily pumped, reducing the entry of excessively large debris into the next stage of equipment. The liquid ultimately pumped from the primary purification chamber by the water pump is the relatively clarified liquid after initial clarification. This significantly reduces the solids content and sludge density in the water, substantially improving the efficiency and lifespan of all subsequent filtration units. Through the staggered design, a miniature "horizontal flow sedimentation tank" spontaneously forms inside the wastewater storage tank 7.3; the sedimentation area is the area below the primary first filter plate 7.1; and the water collection area is the primary purification chamber.

[0101] In this invention, the fine filtration unit 6 is mainly used to further purify the pre-purified water and optimize the purification effect of the wastewater.

[0102] In this invention, the fine filtration unit 6 is generally connected to the primary coarse filtration unit 4 or the secondary coarse filtration unit 5 in the secondary coarse filtration unit, and the connection method is generally a pumping method.

[0103] In this invention, the fine filtration unit 6 includes a fine filtration box; the fine filtration box is provided with a sealing cover 1-1; the fine filtration box includes a fine filtration box body 601; the fine filtration box body 601 is provided with a filtration structure; the fine filtration box body 601 is the main structure of the fine filtration box; the setting of the sealing cover 1-1 can realize the opening and closing of the fine filtration box, which facilitates the subsequent replacement of the filter element mechanism.

[0104] In addition, in this invention, the sealing cover 1-1 can also serve as part of the carriage. A hole is made at the location where the fine filter unit 6 is installed in the carriage, and the sealing cover 1-1 covers the hole. The sealing cover 1-1 can be flipped open, which facilitates the replacement of the filter element.

[0105] The filtration structure is mainly for further purifying the initially purified water.

[0106] In addition, the filter structure in this invention includes a filter mechanism; the filter mechanism includes a filter ring plate; the filter mechanism can not only filter, but also provide good support, and facilitates the arrangement and placement of the subsequent stirring structure and filter element mechanism.

[0107] There is a flow gap between the outer side of the filter ring plate and the inner wall of the fine filter box 601; the existence of the flow gap facilitates the discharge of filtered water.

[0108] In this invention, a filter ring plate forms a fine filtration cavity; the fine filtration cavity is connected to a fine filtration liquid supply mechanism; the fine filtration liquid supply mechanism can supply water to the fine filtration cavity; the fine filtration liquid supply mechanism is mainly connected to the pumping unit 9, and its purpose is to supply liquid to the fine filtration cavity. The fine filtration liquid supply mechanism includes a fine filtration liquid supply pipe, and a control valve is provided on the fine filtration liquid supply pipe. The control valve is generally a one-way valve to prevent water from flowing back to the fine filtration liquid supply pipe through the fine filtration cavity.

[0109] In this invention, the fine filter box 601 and the sealing cover 1-1 together constitute a pressure-bearing sealed container; the filter ring plate acts as a structural skeleton; the filter ring plate is provided with filter holes and is a component with preliminary filtration function.

[0110] In this invention, the filter ring plate forms an independent fine filtration chamber; the water to be filtered will first be pumped into the fine filtration chamber.

[0111] The fine filtration supply mechanism pumps pretreated wastewater into the fine filtration chamber; under pressure, the water must pass radially through the filter rings; tiny suspended solids, colloids, and even bacteria in the water are trapped layer by layer; the purified water enters the flow gap and finally converges at the fine filtration outlet.

[0112] The space enclosed by the filter ring plate is essentially a standard, annular filter cartridge installation chamber; various filter cartridges, including PP cotton, activated carbon 6.8, and ultrafiltration membrane 6.9, can be inserted here to form a combined deep filtration system; this design allows for flexible replacement of filter cartridge combinations according to water quality requirements, making it highly versatile; all trapped contaminants are sealed inside the fine filtration chamber, while the water flowing through subsequent pipelines and equipment is already purified clean water.

[0113] After opening the sealing cover 1-1, the fine filter inner cavity can be easily cleaned, or the entire annular filter element mechanism can be directly replaced. The maintenance operation is very intuitive and simple.

[0114] Furthermore, in this invention, the filtration structure includes a filter element mechanism connected to the filtration mechanism; the filter element mechanism mainly undertakes the final water purification function.

[0115] In this invention, the filter element mechanism is a replaceable functional module that carries the core filtration function; the filter element mechanism is circular in horizontal projection; the filter element mechanism includes a PP cotton filter element 6.7, an activated carbon filter element 6.8, and an ultrafiltration membrane filter element 6.9; the PP cotton filter element 6.7, the activated carbon filter element 6.8, and the ultrafiltration membrane filter element 6.9 are arranged in a circular pattern in sequence.

[0116] The filtration mechanism provides a structural framework and installation base, facilitating the installation and placement of the filter element mechanism.

[0117] In addition, the horizontal projection of the filter element is circular: this design forms a 360° filtration circumference.

[0118] In this invention, the filter cartridge mechanism mainly integrates three types of specialized filter cartridges, each with its own function in the field of water treatment:

[0119] PP cotton filter element 6.7; relies on its fiber mesh to intercept tiny suspended solids, silt, rust, etc. that pass through the coarse filter.

[0120] Activated carbon 6.8 filter cartridge: Physicochemical adsorption, utilizing its huge specific surface area and rich pore structure to efficiently adsorb discoloration, odor, residual chlorine, and some organic pollutants in water.

[0121] Ultrafiltration membrane 6.9 filter element: molecular-level sieving, with extremely small pore size, capable of retaining colloids and large molecular organic matter.

[0122] The PP cotton filter cartridge 6.7, activated carbon filter cartridge 6.8, and ultrafiltration membrane filter cartridge 6.9 are arranged progressively outward from the center of the fine filtration chamber 601, forming a sequential filtration order. This ensures that each filter cartridge protects the next stage. The PP cotton protects the activated carbon 6.8 and ultrafiltration membrane 6.9 from physical clogging, while the activated carbon 6.8 protects the ultrafiltration membrane 6.9 from chemical degradation. This greatly extends the service life of the most expensive and sophisticated ultrafiltration membrane 6.9 filter cartridge, thereby significantly reducing the long-term operating costs of the system.

[0123] The entire filter element mechanism can be designed as a replaceable ring module. When a certain stage of the filter element (usually the first stage PP cotton) reaches the end of its life, the sealing cover 1-1 can be easily opened to remove the entire ring filter element assembly for replacement or maintenance. The operation is very simple.

[0124] Furthermore, in this invention, the filter ring plate includes a first ring plate 6.6 and a second ring plate 6.5, which are coaxially spaced apart; the inner diameter of the first ring plate 6.6 is larger than the outer diameter of the second ring plate 6.5; the first ring plate 6.6 is connected to the inner wall of the fine filter box 601; the first ring plate 6.6 and the second ring plate 6.5 are connected by a lower base plate 602; an assembly gap is formed between the first ring plate 6.6 and the second ring plate 6.5; the filter element mechanism is inserted into the assembly gap; in this invention, the first ring plate... Plate 6.6 is arranged outside the second ring plate 6.5; the first ring plate 6.6, the lower bottom plate 602, and the second ring plate 6.5 constitute an inner box structure; the upper end of the first ring plate 6.6 can be connected to the inner wall of the fine filter box 601 through a connecting plate; the lower end of the first ring plate 6.6 is connected to the second ring plate 6.5 through the lower bottom plate 602; in this invention, the first ring plate 6.6 and the second ring plate 6.5 form two filter plate layers, which optimizes the purification effect of large particles; at the same time, it can provide filtration protection for the filter element mechanism.

[0125] In addition, in this invention, the first ring plate 6.6 is spaced apart from the inner wall of the fine filter box 601, and its upper end is connected to the inner wall of the fine filter box 601 through a connecting plate.

[0126] The first ring plate 6.6 and the second ring plate 6.5 are connected by the lower bottom plate 602, so that the bottom of the fine filter cavity is sealed.

[0127] The assembly gap is a insertion point prepared for the annular filter element mechanism, which is made into a matching annular module that can be precisely installed like inserting a card into a slot.

[0128] In this invention, the lower base plate 602 protrudes towards the center of the fine filter box 601; based on the above design, the lower base plate 602 of this invention is arranged with a high center and low sides, which facilitates the outward discharge of water from the fine filter cavity.

[0129] In this invention, the fine filtration unit 6 also includes a stirring structure; the stirring structure includes an upper connecting plate 603 arranged on the filter ring plate; the upper connecting plate 603 is provided with a stirring mechanism; the stirring mechanism is connected to a stirring drive mechanism; the stirring mechanism includes a stirring rod, and the stirring rod is provided with stirring blades 6.4; the upper connecting plate 603 of this invention is connected to the upper end of the second ring plate 6.5; one function of the upper connecting plate 603 is to serve as a basic connection, and another function is to serve as a support, which facilitates the arrangement of the stirring mechanism.

[0130] The stirring drive mechanism 6.3 is generally a servo motor. The stirring rod of the stirring mechanism passes through the upper connecting plate 603 and is connected to the servo motor. The upper connecting plate 603 also plays a good blocking role to prevent the water in the fine filter cavity from affecting the use of the servo motor.

[0131] In this invention, the sealing cover 1-1 is rotatably connected to the fine filter housing 601; the sealing cover 1-1 includes a sealing cover 1-1 body; the sealing cover 1-1 body is provided with a compression ring plate 101 on the side near the fine filter housing 601; the sealing cover 1-1 body is pressed onto the filter element mechanism by the compression ring plate 101; the present invention, by setting the compression ring plate 101, can press the filter element mechanism arranged in the assembly gap at the top, so as to avoid the filter element mechanism shaking in the filtration mechanism.

[0132] Furthermore, in this invention, the pumping unit 9 includes a fine filtration outlet unit; the fine filtration outlet unit includes a fine filtration water pump 6.2; the fine filtration water pump 6.2 is connected to the fine filtration outlet on the fine filtration box 601 through a clean water pipe 12; the fine filtration outlet unit is connected to a disinfection and sterilization device 8; the fine filtration outlet unit is provided to facilitate the discharge of the purified water from the fine filtration unit 6.

[0133] In this invention, the fine filtration outlet unit mainly realizes the active and controllable recovery of purified water; the fine filtration outlet unit can realize the discharge of water purified by the fine filtration unit 6 or enter the clean water tank 1-11.

[0134] The 6.2 fine filtration pump provides stable and controllable delivery pressure, ensuring smooth operation of the entire water circulation process.

[0135] The start and stop of the fine water pump 6.2 can be precisely controlled by the on-board electronic control system to achieve automated operation and link with other vehicle systems (such as water level sensors) to improve the overall intelligence level of the system.

[0136] The disinfection and sterilization device 8 is mainly to ensure the biological safety of the recycled water; there are many types of disinfection and sterilization devices 8, such as ultraviolet (UV) sterilizers or ozone generators; its function is to kill or inactivate pathogenic microorganisms that may remain in the water.

[0137] In this invention, the wastewater energy recovery system includes a water spray cleaning device 10; the water spray cleaning device 10 includes a cleaning water pump 10.2, a water spray bar 10.1, and a cleaning pipeline 10.3; the cleaning water pump 10.2 is connected to the cleaning water pump 10.2 and the clean water tank 1-11 in the carriage through the cleaning pipeline 10.3; the water spray bar 10.1 is provided with spray holes; the water spray bar 10.1 is connected to the cleaning water pipe 3.1; the water spray cleaning device 10 disclosed in this invention is essentially a self-cleaning device for the carriage or wastewater energy recovery system.

[0138] It mainly includes a cleaning water pump 10.2; the cleaning water pump 10.2 is mainly used to pump clean water into the carriage or sewage treatment unit.

[0139] The water spray bar 10.1 is essentially a spray bar with a hollow interior. It has spray holes to facilitate the entry of water into the carriage for washing.

[0140] The cleaning pipeline 10.3 in this invention facilitates the connection and communication between the cleaning water pump 10.2 and the spray bar 10.1, as well as between the cleaning water pump 10.2 and the clean water tank 1-11. Essentially, it is a connecting pipeline.

[0141] In this invention, the water spray bar 10.1 is connected to the cleaning water pipe 3.1: this allows the water spray cleaning device 10 to supply clean water for cleaning to the power generation diversion unit 3, facilitating subsequent cleaning operations.

[0142] The working principle and core function of the water spray cleaning device 10 in this invention are as follows:

[0143] Provides clean power and water:

[0144] Cleaning water pump 10.2 draws clean water from clean water tanks 1-11; this ensures that the cleaning medium is clean and will not cause secondary pollution to the system, realizing the logic of "washing the system with clean water".

[0145] The water spray cleaning device 10 disclosed in this invention can perform two main cleaning tasks simultaneously or at different times:

[0146] Task 1: Flushing the inside of the trash can:

[0147] Path: Cleaning water pump 10.2, cleaning pipeline 10.3, spray bar 10.1.

[0148] Function: The water spray bar 10.1 sprays water into the inner wall and space of the garbage bin 1 through its spray holes, washing away the residual sludge and garbage from the bin and preparing a clean container for the next operation.

[0149] The waste after rinsing can be discharged directly from the tailgate or sent to the sewage treatment system for cleaning.

[0150] Backflushing of wastewater treatment unit:

[0151] Path: Cleaning water pump 10.2, cleaning pipeline 10.3, water spray bar 10.1 and cleaning water pipe 3.1.

[0152] The cleaning water pipe 3.1 is connected to the annular water channel 3.7 of the power generation diversion unit 3. When cleaning is started, high-pressure clean water is injected back into the sewage treatment system through this pipe to flush it.

[0153] At the same time, the corresponding water pumps in the sewage treatment system are also pneumatic, realizing the circulation of clean water in the sewage treatment system, thereby achieving the cleaning operation of the sewage treatment system.

[0154] A sweeper truck includes a carriage; the carriage includes a clean water tank 1-11 and a garbage bin 1; a wastewater energy recovery system is installed inside the carriage; the carriage is connected to an air intake duct 2; a power generation unit 3 in the wastewater energy recovery system is arranged opposite to the air intake duct 2; the sweeper truck disclosed in this invention includes a chassis, on which a carriage is provided, and a wastewater energy recovery system is installed inside the carriage; in addition, the carriage of this invention includes a clean water tank 1-11 and a garbage bin 1, the clean water tank 1-11 is filled with clean water for sweeping, and the garbage bin 1 is used to store the garbage collected during sweeping; the clean water tank 1-11 and the garbage bin 1 are spaced apart; the two are not interconnected.

[0155] Meanwhile, in this invention, the wastewater energy recovery system is mainly arranged inside the garbage bin 1; the inside of the garbage bin 1 forms the inner cavity of the garbage bin 1.

[0156] In this invention, the carriage is required to be connected to an air intake duct 2; the power generation diversion unit 3 in the sewage energy recovery system is arranged opposite to the air intake duct 2; the air intake duct 2 is the pipeline of the negative pressure sewage suction system of the sweeper, through which all the sewage, garbage and air mixtures are drawn into the garbage bin 1 at high speed; the power generation diversion unit 3 (especially its rotating blades 3.3) is directly aligned with the inlet of this high-speed sewage flow, which means that the sewage and airflow carrying huge kinetic energy coming out of the air intake duct 2 can directly and concentratedly impact the blades of the power generation mechanism.

[0157] Generally, an air inlet duct 2 is arranged on each side of the carriage, but the present invention requires that one air inlet duct 2 corresponds to one power generation diversion unit 3; when two or more power generation diversion units 3 are set, each power generation diversion unit 3 can be connected to the sewage treatment unit. Specific Implementation

[0158] Energy Recovery: As shown in the diagram, the air intake duct 2 carries sewage and garbage into the garbage bin 1, blowing it upwards towards the power generation diversion unit 3. The wind and airflow drive the rotating blades 3.3 to rotate, simultaneously driving the generator 3.4 to generate electricity. The generated electricity can be stored in the power battery to power the vehicle's power system, and also power the sewage filtration device and various water pumps. This achieves the effective recovery and utilization of wind energy by converting it into electrical energy.

[0159] Wastewater Treatment Unit: Wastewater Coarse Filtration Channel 1: Most wastewater flows directly into the waste storage area inside the waste bin 1 through the air inlet duct 2, and then flows into the primary coarse filtration unit 7 at the rear of the waste bin 1 via the inclined plate in the waste storage area, thus entering the wastewater coarse filtration channel. A small portion of wastewater is blown onto the rotating blades 3.3 and the water intake panel 3.9 by the wind. The wastewater on the rotating blades 3.3 is thrown towards the 0.5mm aperture annular filter screen 3.5 under the action of centrifugal force, and a small portion of the wastewater enters the annular water channel 3.7 through the 0.5mm aperture annular filter screen 3.5. Another small portion of wastewater is adsorbed by the water intake panel 3.9 and, under the action of gravity, flows along the water intake panel 3.9 to the center, and then enters the annular water channel 3.7 along the water guide trough 3.8, thus entering the wastewater fine filtration channel 1. The power generation diversion unit 3 of this invention is symmetrically arranged along the left and right sides of the waste bin 1, and each corresponds to one air inlet duct 2.

[0160] Wastewater fine filtration water path one: Wastewater collected in the circular waterway 3.7 enters the primary coarse filtration unit 4 through the guide pipe 3.10. Under the action of gravity, the wastewater falls onto the primary filter screen 4.1 with a pore size of 0.2mm. The filtered impurities return to the inside of the garbage bin 1 along the inclined surface. The finely filtered wastewater enters the fine filtration unit 6 through the wastewater pipe 9.1 for ultra-fine filtration.

[0161] Wastewater coarse filtration path two: Most of the aforementioned wastewater flows directly into the garbage bin 1 through the air inlet duct 2, and most of the wastewater flows along the inclined plate at the bottom of the garbage bin 1 to the primary coarse filtration unit 7 at the rear of the garbage bin 1. The wastewater flows through the primary first filter plate 7.1 with 3mm perforations to the wastewater storage tank 7.3. The wastewater storage tank 7.3 is separated by a primary second filter plate 7.2 with 2mm perforations. Particles larger than 2mm and smaller than 3mm are isolated in the area below the primary filter plate 7.1 with 3mm perforations. The water in the wastewater storage tank 7.3, under the action of the coarse filtration pump 7.4, enters the secondary coarse filtration unit 5 through wastewater pipe two 9.2.

[0162] Wastewater flows out from the outlet of wastewater pipe 9.2 to filter cone 5.2 (single filter cartridge) with a 1mm aperture. The wastewater then passes through filter cone 5.3 (single filter cartridge) with a 0.5mm aperture to filter cone 5.4 (single filter cartridge) with a 0.2mm aperture before flowing into secondary filter box 5.5 and entering the second chamber 5.6. Three single filter cartridges are connected in secondary filter box 5.5 and rotate around an axis via sliding bearings 5.7 at both ends. The first motor 5.10 drives a V-belt via a drive pulley 5.9, which in turn drives a driven pulley 5.8, which in turn drives the entire rotating filter cartridge to rotate.

[0163] A gap is left between adjacent filter cartridges to ensure that filtered impurities fall into the waste bin 1 along the inclined surface of the cone. Because the filter cartridges are constantly rotating, it effectively prevents impurities from accumulating and clogging the filter holes. At the same time, the vibration of the first motor itself can be directly transmitted to the cone through the V-belt, accelerating the discharge of impurities along the inclined surface of the filter cartridges. The sewage flowing into the second chamber 5.6 then enters the sewage pipe 3 9.3 through the secondary outlet 5.1. The finely filtered sewage enters the fine filtration unit 6 along the sewage pipe 3 9.3 for ultra-fine filtration.

[0164] Wastewater Ultrafiltration: Wastewater from Wastewater Fine Filtration Line 1 and Wastewater Fine Filtration Line 2 converges into the same pipe. Wastewater from Wastewater Pipe 1 (9.1) and Wastewater Pipe 3 (9.3) is drawn in by the ultrafiltration device pump 6.1 and passes through a three-position directional valve 11. The function of the three-position directional valve 11 is to ensure pump suction when one of the fine filtration lines has insufficient wastewater. The valve automatically switches to a single-line wastewater intake, and the wastewater enters the inner cavity of the fine filtration unit 6 through the ultrafiltration device pump 6.1. A one-way valve 6.10 is installed on the pipe entering the inner cavity of the fine filtration unit 6 to prevent backflow of wastewater. The stirring drive mechanism 6.3 drives the stirring blades 6.4 to rotate the water in the inner cavity. Impurities in the water diffuse to the surroundings under centrifugal force and pass through the ultra-fine filter element composed of PP cotton filter element 6.7, activated carbon 6.8, and ultrafiltration membrane 6.9. After being purified by the filter element, the wastewater flows into the outer cavity. The ultra-fine filter element is fixed by a first ring plate 6.6 with a pore size of 1mm and a second ring plate 6.5 with a pore size of 1mm. After a period of use, the ultra-fine filter element can be replaced to ensure the filtration effect of the fine filtration unit 6. The ultra-fine filter element can be replaced by opening the sealing cover 1-1 from the top of the garbage bin 1. After the sealing cover 1-1 is closed, it can ensure that the garbage bin 1 is isolated from the outside world, thereby ensuring that the garbage bin 1 is always in a negative pressure state. Wastewater passes through the ultra-fine filter element to produce purified water, which enters the purified water pipe 12 under the action of the fine filtration water pump 6.2. Figure 10To prevent backflow of purified water into the purified water pipe 12 due to negative pressure inside the garbage bin 1, a one-way valve 13 is installed on the purified water pipe 12. The purified water flows to the disinfection and sterilization device 8 under gravity for disinfection. The disinfectant tank 8.1 is located outside the garbage bin 1 for easy replenishment. The opening of the disinfectant tank 8.1 is inverted, allowing disinfectant to drip downwards into the purified water. After passing through the disinfection and sterilization device and receiving disinfectant, the purified water is transformed into sterile and non-toxic water. The purified water then flows back to the clean water tank 1-11 via the clean water pipe 14 for reuse.

[0165] Self-cleaning: After the operation is completed and the pure electric sweeper returns to the waste incineration plant to unload the waste, the corresponding pipelines of the wastewater energy recovery system need to be cleaned to prevent dust accumulation and blockage, ensuring filtration capacity for the next operation. First, open the tail door of the waste bin 1. Second, the power generation diversion unit 3 is connected to the cleaning water pipe 3.1 leading from the water spray cleaning device 10, and the cleaning pipe 10.3 on the water spray cleaning device 10 is connected to the clean water tank 1-11. The cleaning water pipe 3.1 on the power generation diversion unit 3 is connected to both ends of the spray bar 10.1 on the water spray cleaning device 10. Water is then drawn from the clean water tank 1-11 by the cleaning water pump 10.2. The drawn water flows through the spray bar 10.1, which has six waist-shaped holes (spray holes) with a length of 30mm and a width of 5mm on its side. The waist-shaped holes spray a fan-shaped stream of water to rinse the garbage storage area in the garbage bin 1. On the other hand, the water flows from both ends of the spray bar 10.1 to the cleaning water pipe 3.1, and then from the cleaning water pipe 3.1 to the annular water channel 3.7 on the power generation diversion unit 3. The cleaning water pipe 3.1 is equipped with a one-way valve 3.2 to prevent clean water from flowing back into the clean water tank 1-11. Power is supplied to the generator 3.4 of the power generation diversion unit 3 to rotate the fan blades. Simultaneously, power is supplied to other filtration devices and water pumps. At this time, the cleaning water pipe 3.1 begins to inject clean water into the sewage treatment unit. The flowing clean water flows into the first sewage fine filtration water path, cleaning the first sewage fine filtration water path. Meanwhile, the spray bar 10.1 on the water spray cleaning device 10 sprays clean water into the garbage bin 1, cleaning the inside of the garbage bin 1. Part of the cleaning wastewater carries mud and stones out of the bin through the tailgate at the rear of the garbage bin 1, while the other part passes through the primary coarse filtration unit 7 and then through the second sewage fine filtration water path, cleaning the second sewage fine filtration water path. Finally, the wastewater from both water paths continues to enter the fine filtration unit 6 to clean each filter element. The cleaned wastewater flows out of the garbage bin 1 through the clean water pipe 12. A reversing valve 11 is installed in the disinfection and sterilization device 8, allowing the cleaned wastewater to be directly discharged from the garbage bin 1 through the bottom drain of the disinfection and sterilization device 8, preventing it from continuing to enter the clean water tank 1-11. At this point, the energy recovery and wastewater recycling devices have been cleaned.

[0166] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A two-stage coarse filter unit for a sweeper truck, characterized in that, Includes a secondary filter box (5.5); the interior of the secondary filter box (5.5) is hollow to form a secondary coarse filtration cavity (5.61); The secondary filter box (5.5) is provided with a secondary outlet (5.1) and a secondary inlet; the secondary filter box (5.5) is provided with a discharge trough; The secondary filter box (5.5) is equipped with a rotating filter cylinder; the rotating filter cylinder is connected to a drive mechanism that can drive the rotating filter cylinder to rotate; the secondary liquid inlet is connected to the rotating filter cylinder; the rotating filter cylinder is connected to the unloading trough.

2. The secondary coarse filter unit for a sweeper truck according to claim 1, characterized in that, The secondary coarse filtration chamber (5.61) is provided with a partition baffle; the partition baffle divides the secondary coarse filtration chamber (5.61) into a first chamber and a second chamber (5.6). The rotating filter cartridge is arranged in the first chamber, and the drive mechanism is arranged in the second chamber (5.6); The drive mechanism includes a first motor (5.10) connected to the secondary filter box (5.5); the first motor (5.10) is connected to the rotating filter cylinder through a transmission unit.

3. The secondary coarse filter unit for a sweeper truck according to claim 1, characterized in that, The rotating filter cartridge includes multiple individual filter cartridges; each individual filter cartridge is arranged coaxially; adjacent individual filter cartridges have different inner diameters; and each individual filter cartridge is nested together in sequence.

4. The secondary coarse filter unit for a sweeper truck according to claim 3, characterized in that, Each of the individual filter cartridges is frustoconical; the smaller end of the individual filter cartridge is positioned close to the secondary outlet (5.1).

5. A coarse filtration unit, characterized in that, It includes a second type of coarse filter unit (5); the second type of coarse filter unit (5) includes the secondary coarse filter unit for sweeper trucks as described in any one of claims 1-4.

6. A coarse filtration unit according to claim 5, characterized in that, The second type of coarse filtration unit (5) includes a first-stage coarse filtration unit (7).

7. A coarse filtration unit according to claim 5, characterized in that, The coarse filtration unit includes one type of coarse filtration unit (4).

8. A wastewater treatment unit, characterized in that, It includes a fine filtration unit (6), a pumping unit, and a coarse filtration unit as described in any one of claims 5-7; the coarse filtration unit can be connected to the fine filtration unit (6) via the pumping unit; the first type of coarse filtration unit (4) and / or the second type of coarse filtration unit (5) are connected to the fine filtration unit (6).

9. A wastewater energy recovery system for sweeper trucks, characterized in that, This includes power generation systems and wastewater treatment systems; The power generation system includes a power generation diversion unit (3); The wastewater treatment system includes the wastewater treatment unit as described in claim 8; The power generation diversion unit (3) is connected to the sewage treatment unit; The power generation diversion unit (3) is capable of generating electricity and supplying recycled sewage to the sewage treatment unit; The power generation diversion unit (3) is connected to the coarse filtration unit and / or the fine filtration unit (6); The power generation diversion unit (3) can pass through a coarse filter unit (4) and a fine filter unit (6).

10. A sweeper truck, characterized in that, The carriage includes a clean water tank (1-11) and a garbage bin (1); the carriage is equipped with a wastewater energy recovery system as described in claim 9; the carriage is connected to an air intake duct (2); the power generation diversion unit (3) in the wastewater energy recovery system is arranged opposite to the air intake duct (2).

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