Movable sewage pretreatment device

Abstract

The utility model discloses a movable sewage pretreatment device, include: box, gas production device, water collecting device, flow guide device, slag discharge device and sludge discharge device, the box includes the dissolved air release area, air floatation area, coagulation zone, flocculation zone, residue collection area, sedimentation area, clean water area and sludge concentration area that set gradually, and the dissolved air release area is provided with sewage inlet, and residue collection area is used for collecting the dross from air floatation area, and flocculation zone and coagulation zone are passed through the first through -hole on the partition between both communications, and sedimentation area and clean water area are passed through the second through -hole on the partition between both communications, and clean water area is provided with clean water outlet, gas production device inserts in the dissolved air release area, is used for releasing air bubble, and water collecting device is respectively with air floatation area and coagulation zone intercommunication, and flow guide device is respectively with flocculation zone and sedimentation area intercommunication, and slag discharge device is respectively with residue collection area and sludge concentration area intercommunication, and sludge discharge device is respectively with sedimentation area and sludge concentration area intercommunication.

Description

Technical Field

[0001] This utility model relates to the technical field of mobile sewage pretreatment devices, and more particularly to a mobile sewage pretreatment device. Background Technology

[0002] Wastewater pretreatment is a crucial upstream step in wastewater treatment systems. Its core objective is to efficiently remove suspended particulate matter, scum, colloids, and other impurities from wastewater, reducing the load on subsequent advanced treatment processes and ensuring the stable operation of the overall wastewater treatment system and compliance with effluent standards. Currently, processes such as air flotation, coagulation, flocculation, and sedimentation are widely used in wastewater pretreatment. However, existing pretreatment devices still face numerous technical bottlenecks in practical applications. Traditional wastewater pretreatment devices often employ a fixed design, with each functional treatment unit (such as air flotation, coagulation, and sedimentation units) operating independently and dispersed. This requires complex external piping for wastewater transfer, resulting in large footprints, cumbersome installation and commissioning, high construction costs, and an inability to flexibly relocate according to changes in discharge locations. Consequently, they are ill-suited to diverse scenarios such as temporary construction sites, emergency pollution incidents, and remote, decentralized discharge points.

[0003] Meanwhile, existing equipment lacks scientific planning and integration of internal functional zones, and the interconnection structure between treatment units is poorly designed. This leads to problems such as poor wastewater transport, discontinuous reactions, and uneven mixing of reagents and wastewater during the treatment process, significantly reducing pretreatment efficiency and pollutant removal effectiveness. Furthermore, traditional equipment lacks a dedicated mechanism for the separate collection and centralized treatment of scum generated from the flotation process and sludge formed from the sedimentation process. Scum and sludge often mix and accumulate, and are even carried back with the water flow, disrupting the normal treatment process, causing secondary pollution, fluctuations in effluent quality, and increasing the difficulty and cost of subsequent solid waste treatment. With increasingly stringent environmental requirements and the diversification of wastewater discharge scenarios, the market demands higher standards for the mobility, integration, treatment efficiency, and solid waste treatment compliance of wastewater pretreatment equipment. Utility Model Content

[0004] One objective of this invention is to provide a mobile wastewater pretreatment device, developing a wastewater pretreatment device that is highly integrated, easy to move, has a continuous and stable treatment process, and can achieve centralized treatment of solid waste classification.

[0005] To achieve the above objectives, the present invention provides a solution as follows: a mobile wastewater pretreatment device includes a housing, a gas generating device, a water collecting device, a flow guiding device, a sludge discharge device, and a sludge discharge device. The housing includes, in sequence, a dissolved air release zone, a flotation zone, a coagulation zone, a flocculation zone, a sludge collection zone, a sedimentation zone, a water purification zone, and a sludge thickening zone. The dissolved air release zone is provided with a wastewater inlet. The sludge collection zone is used to collect scum from the flotation zone. The flocculation zone and the coagulation zone are connected through a first through-hole in a partition between them. The sedimentation zone and the water purification zone are connected through a second through-hole in a partition between them. The water purification zone is provided with a purified water outlet. The gas generating device is inserted in the dissolved air release zone to release air bubbles. The water collecting device is connected to both the flotation zone and the coagulation zone. The flow guiding device is connected to both the flocculation zone and the sedimentation zone. The sludge discharge device is connected to both the sludge collection zone and the sludge thickening zone, and is used to discharge the sludge from the sludge collection zone. The sludge discharge device is connected to both the sedimentation zone and the sludge thickening zone, and is used to discharge the sludge from the sedimentation zone.

[0006] Optionally, the slag discharge device is equipped with a first check valve, and the sludge discharge device is equipped with a second check valve.

[0007] Optionally, the first through hole is located near the bottom of the housing, and the second through hole is located near the top of the housing.

[0008] Optionally, the gas generating device includes a first gas generator and a releaser. The releaser is located in the dissolved gas release zone. The end of the releaser is provided with multiple extended rods, and the extended rods are provided with gas outlet holes. The first gas generator is connected to the releaser.

[0009] Optionally, the gas generating device includes a gas-water mixer and a water circulator. The housing also has a transition zone connected to the air flotation zone. The first gas generator is connected to the release device through the gas-water mixer. The water circulator is connected to the transition zone and the gas-water mixer respectively. The water circulator is equipped with a third one-way valve.

[0010] Optionally, the mobile wastewater pretreatment unit also includes a second gas generator for aerating the coagulation and flocculation zones.

[0011] Optionally, the mobile wastewater pretreatment device includes a sludge treatment device connected to a sludge thickening zone, and the sludge treatment device is equipped with a fourth check valve.

[0012] The beneficial effects of this utility model are as follows: This technical solution effectively solves the technical problems of poor mobility, dispersed functional zones leading to low treatment efficiency, and chaotic treatment of sludge and solid waste in traditional sewage pretreatment devices, thereby achieving the technical effects of efficient pretreatment, flexible mobility, and centralized solid waste treatment. Regarding the problem of poor mobility, the solution integrates all functional devices into corresponding parts of the housing, allowing the entire device to be moved with the housing, breaking the usage scenario limitations of traditional fixed pretreatment devices and making it suitable for various flexible needs such as temporary sewage discharge points and emergency sewage treatment. Regarding the problem of dispersed functional zones, by sequentially setting up each functional area within the housing according to the treatment process, and achieving orderly connectivity between areas through specific through-hole structures and flow guiding and water collection devices, it ensures that sewage completes a series of treatment steps such as flotation, coagulation, flocculation, and sedimentation according to the preset process, significantly improving the continuity and efficiency of sewage pretreatment. To address the issue of inconsistent treatment of sludge and wastewater, a dedicated sludge collection area was established to collect the sludge generated from air flotation. A sludge discharge device was used to remove the sludge and partially introduce it into the sludge thickening area. Simultaneously, a sludge discharge device was used to remove sludge from the sedimentation area and partially introduce it into the sludge thickening area. This achieved the classified collection and centralized treatment of sludge and wastewater, which reduced the interference of solid waste on the treatment process and lowered the difficulty of subsequent solid waste treatment. Ultimately, this significantly improved the overall effect of wastewater pretreatment and ensured the quality of the effluent. Attached Figure Description

[0013] 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 the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a top view of the portable sewage pretreatment device provided in this embodiment of the utility model;

[0015] Figure 2 This is a side view of the portable sewage pretreatment device provided in this embodiment of the utility model.

[0016] Explanation of icon numbers:

[0017] 10. Tank, 101. Wastewater Inlet, 102. Clean Water Outlet, 11. Dissolved Air Release Zone, 12. Air Flotation Zone, 13. Coagulation Zone, 14. Flocculation Zone, 15. Sludge Collection Zone, 16. Sedimentation Zone, 17. Clean Water Zone, 18. Sludge Thickening Zone

[0018] 19 Transition zone, 20 Gas production unit, 21 First gas generator, 22 Release device, 23 Gas-water mixer

[0019] 24 Water circulator, 25 Third check valve, 30 Water collection device, 40 Flow guiding device, 50 Sludge discharge device

[0020] 51 First check valve, 60 Sludge discharge device, 61 Second check valve, 70 Second gas generator

[0021] 80 Sludge treatment device, 81 Fourth check valve. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, clearly and comprehensively demonstrating the technical solution. It should be noted that the listed embodiments are only a part of this utility model, and not all possible implementations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Please see Figure 1 and Figure 2 As shown, Figure 1 This is a top view of the portable wastewater pretreatment device provided in this embodiment of the utility model. Figure 2 This is a side view of the portable sewage pretreatment device provided in this embodiment of the utility model.

[0024] The mobile wastewater pretreatment device includes: a housing 10, a gas generation device 20, a water collection device 30, a flow guiding device 40, a sludge discharge device 50, and a sludge discharge device 60. The housing 10 includes, in sequence, a dissolved air release zone 11, a flotation zone 12, a coagulation zone 13, a flocculation zone 14, a sludge collection zone 15, a sedimentation zone 16, a water purification zone 17, and a sludge thickening zone 18, which are separated by partitions. The dissolved air release zone 11 is provided with a wastewater inlet 101. The sludge collection zone 15 is used to collect sludge from the flotation zone 12. The flocculation zone 14 and the coagulation zone 13 are connected by a first through hole in the partition between them. The sedimentation zone 16... The purification zone 17 is connected to the air flotation zone 12 and the coagulation zone 13 through a second through hole in the partition between them. The purification zone 17 is equipped with a purified water outlet 102. The gas generation device 20 is inserted in the dissolved air release zone 11 to release air bubbles. The water collection device 30 is connected to the flotation zone 12 and the coagulation zone 13 respectively. The flow guiding device 40 is connected to the flocculation zone 14 and the sedimentation zone 16 respectively. The sludge discharge device 50 is connected to the sludge collection zone 15 and the sludge thickening zone 18 respectively. The sludge discharge device 50 is used to discharge the sludge from the sludge collection zone 15. The sludge discharge device 60 is connected to the sedimentation zone 16 and the sludge thickening zone 18 respectively. The sludge discharge device 60 is used to discharge the sludge from the sedimentation zone 16.

[0025] The mobile wastewater pretreatment device of this embodiment uses the housing 10 as its core load-bearing structure. By rationally dividing the internal functional areas and integrating various treatment devices, it achieves efficient pretreatment of wastewater. The housing 10 is arranged sequentially according to the wastewater treatment process: dissolved air release zone 11, flotation zone 12, coagulation zone 13, flocculation zone 14, sludge collection zone 15, sedimentation zone 16, water purification zone 17, and sludge thickening zone 18. Each zone has a clear division of labor and works collaboratively. Wastewater enters the device through the wastewater inlet 101 of the dissolved air release zone 11. The gas generating device 20, inserted in this zone, releases bubbles. These bubbles combine with suspended pollutants in the wastewater and enter the flotation zone 12. The flotation effect causes some pollutants to float to the surface, forming scum, which is collected by the specially designed sludge collection zone 15. After flotation treatment, the wastewater enters the coagulation zone 13 under the guidance of the water collection device 30. After coagulation, it flows into the flocculation zone 14 through the first through-hole in the partition plate between the coagulation zone 13 and the flocculation zone 14 for further flocculation to form larger flocs. PAC (polyaluminum chloride) and PAM (polyacrylamide) are added simultaneously and sequentially to coagulation zone 13 and flocculation zone 14. Wastewater containing flocs enters sedimentation zone 16 through diversion device 40. The flocs settle under gravity to form sludge, while the supernatant clear water enters purification zone 17 through the second through-hole in the partition between sedimentation zone 16 and purification zone 17, and is finally discharged from purification outlet 102 of purification zone 17. Scum collected in sludge collection zone 15 is discharged through sludge discharge device 50, which also guides some of the sludge into sludge thickening zone 18. Sludge generated in sedimentation zone 16 is discharged through sludge discharge device 60, which also guides some of the sludge into sludge thickening zone 18, achieving centralized treatment of sludge and sludge. In addition, the gas generating device 20, water collecting device 30, flow guiding device 40, slag discharge device 50 and sludge discharge device 60 are all integrated into the corresponding functional areas of the box 10, so that the entire device can be moved and transported synchronously with the box 10 to meet the sewage pretreatment needs in different scenarios.

[0026] This technical solution effectively solves the technical problems of poor mobility, dispersed functional zones leading to low treatment efficiency, and chaotic sludge and solid waste treatment in traditional wastewater pretreatment devices. It achieves high-efficiency pretreatment, flexible mobility, and centralized solid waste treatment. Addressing the mobility issue, the solution integrates all functional devices into corresponding parts of the housing 10, allowing the entire device to be moved along with the housing 10. This breaks the limitations of traditional fixed pretreatment devices and is suitable for various flexible needs such as temporary wastewater discharge points and emergency wastewater treatment. Addressing the dispersed functional zones, the solution arranges functional areas sequentially within the housing 10 according to the treatment process. Specific through-hole structures and flow guiding / water collection devices 30 ensure orderly connectivity between these areas, guaranteeing that wastewater completes a series of treatment steps, including flotation, coagulation, flocculation, and sedimentation, according to the preset process. This significantly improves the continuity and efficiency of wastewater pretreatment. To address the issue of inconsistent treatment of sludge and wastewater, a dedicated sludge collection area 15 is established to collect sludge generated from air flotation. The sludge is discharged through a sludge discharge device 50 and partially introduced into the sludge concentration area 18. Simultaneously, a sludge discharge device 60 is used to discharge sludge from the sedimentation area 16 and partially introduce it into the sludge concentration area 18. This achieves the classified collection and centralized treatment of sludge and wastewater, reducing the interference of solid waste on the treatment process and lowering the difficulty of subsequent solid waste treatment. Ultimately, this significantly improves the overall effect of wastewater pretreatment and ensures the quality of the effluent.

[0027] The sludge discharge device 50 is equipped with a first one-way valve 51, and the sludge discharge device 60 is equipped with a second one-way valve 61. In this embodiment, the portable wastewater pretreatment device adds a first one-way valve 51 and a second one-way valve 61 to the sludge discharge device 50 and the sludge discharge device 60, respectively; the remaining structure is consistent with the aforementioned embodiment. The first one-way valve 51 is installed on the fluid channel of the sludge discharge device 50, and its flow direction is consistent with the sludge discharge direction, allowing only the sludge collected in the sludge collection zone 15 to flow unidirectionally to the outside of the device or to the sludge thickening zone 18. The second one-way valve 61 is installed on the fluid channel of the sludge discharge device 60, and its flow direction is consistent with the sludge discharge direction, allowing only the sludge generated in the sedimentation zone 16 to flow unidirectionally to the outside of the device or to the sludge thickening zone 18. During operation, when the slag discharge device 50 is started, the first one-way valve 51 opens under fluid pressure, allowing scum to be discharged smoothly along a preset path or introduced into the sludge thickening zone 18. After slag discharge stops, the first one-way valve 51 automatically closes, preventing external fluid or material from the sludge thickening zone 18 from flowing back into the slag collection zone 15. Similarly, when the sludge discharge device 60 is started, the second one-way valve 61 opens with fluid pressure, allowing sludge to be discharged or introduced into the sludge thickening zone 18 in a set direction. After sludge discharge stops, the second one-way valve 61 closes, preventing reverse fluid from entering the sedimentation zone 16. Through precise control of the bidirectional one-way valves, unidirectional flow of the slag and sludge discharge process is achieved.

[0028] This technical solution effectively solves the backflow problem that easily occurs in the sludge and sludge discharge process of traditional sewage pretreatment devices by setting a first one-way valve 51 and a second one-way valve 61 on the sludge discharge device 50 and the sludge discharge device 60, respectively. This problem is caused by sludge, sludge, or external pollutants flowing back into the treatment areas such as the sludge collection area 15 and the sedimentation area 16, leading to secondary pollution of the treated water and disorder of the treatment process. This achieves the technical effect of ensuring the stability of the treatment process and improving the pretreatment effect. The first one-way valve 51, through its one-way conduction characteristic, strictly restricts the scum to flow only in the discharge direction, preventing the backflow of external materials or the mixture of materials in the sludge concentration area 18 back to the sludge collection area 15 after the sludge discharge stops, thus preventing abnormal accumulation of scum in the sludge collection area 15 or pollution of the treated water in the flotation area 12. Similarly, the second one-way valve 61 prevents backflow of materials into the sedimentation area 16 after the sludge discharge stops, thus preventing disturbance of the sludge layer in the sedimentation area 16 and re-turbidity of the clarified water. The bidirectional check valve requires no additional power control and automatically switches on and off based solely on fluid pressure. This ensures the smoothness of the slag and mud discharge process and blocks backflow pollution paths at the source, keeping the material state of each treatment area stable. This significantly improves the continuity and reliability of wastewater treatment and ultimately ensures that the effluent quality of the purified water outlet 102 meets the preset standards. At the same time, it reduces the frequency of equipment cleaning and maintenance costs caused by backflow.

[0029] The first through-hole is located near the bottom of the tank 10, and the second through-hole is located near the top of the tank 10. In the mobile wastewater pretreatment device of this embodiment, the first through-hole on the partition between the coagulation zone 13 and the flocculation zone 14 is located near the bottom of the tank 10, and the second through-hole on the partition between the sedimentation zone 16 and the purification zone 17 is located near the top of the tank 10. The remaining structure is consistent with the aforementioned embodiment. In the wastewater treatment process, the wastewater that has completed the coagulation reaction in the coagulation zone 13 will flow smoothly into the flocculation zone 14 from the bottom of the coagulation zone 13 through the through-hole located at the bottom of the partition. During the flow, the wastewater slowly diffuses upward along the bottom of the flocculation zone 14, fully contacting and mixing with the flocculant in the flocculation zone 14. After the sedimentation reaction is completed in the sedimentation zone 16, the upper clarified water will flow naturally into the purification zone 17 from the top of the sedimentation zone 16 through the through-hole located at the top of the partition. The sludge produced by sedimentation will remain at the bottom of the sedimentation zone 16 due to gravity, preventing it from entering the purification zone 17 along with the clean water. The two through holes are designed to be adapted to the treatment functions of the corresponding areas, ensuring that the flow path of wastewater in each treatment stage is precisely matched with the reaction requirements.

[0030] This technical solution effectively solves the technical problems of insufficient wastewater reaction and incomplete separation of clear water and sludge / flocculation caused by unreasonable through-hole design in traditional systems. By placing the first through-hole near the bottom of the tank 10 and the second through-hole near the top of the tank 10, it achieves the technical effect of improving flocculation reaction efficiency and ensuring the purity of effluent. Regarding the problem of insufficient mixing between wastewater and flocculant after coagulation, the first through-hole at the bottom allows wastewater to flow in from the bottom of the flocculation zone 14. During the upward flow of the wastewater, it forms a reverse contact with the flocculant, prolonging the mixing reaction time and avoiding short-flow or uneven local mixing of wastewater. This significantly improves the sufficiency of the flocculation reaction, making it easier for suspended pollutants to form large-diameter flocs. Regarding the problem of sludge easily being carried into the clear water after sedimentation, the second through-hole at the top only allows the clarified clear water from the upper layer of the sedimentation zone 16 to enter the clean water zone 17. The sludge generated by sedimentation accumulates at the bottom due to gravity and cannot pass through the top through-hole, physically blocking the mixing of sludge and clear water, significantly improving the solid-liquid separation effect. Ultimately, the differentiated placement of the two through holes not only enhanced the reaction effect of each stage of wastewater pretreatment but also ensured the purity of the effluent from the purification zone 17, further optimizing the wastewater purification capacity of the device.

[0031] The gas generating device 20 includes a first gas generator 21 and a releaser 22. The releaser 22 is disposed in the dissolved gas release zone 11, and its end has multiple extended rods with air outlet holes. The first gas generator 21 is connected to the releaser 22. Further, the gas generating device 20 includes a gas-water mixer 23 and a water circulator 24. The housing 10 also has a transition zone 19 connected to the flotation zone 12. The first gas generator 21 is connected to the releaser 22 via the gas-water mixer 23. The water circulator 24 is connected to both the transition zone 19 and the gas-water mixer 23, and is equipped with a third one-way valve 25. In this embodiment of the portable wastewater pretreatment device, the structure of the gas generating device 20 is further optimized, while the remaining structure remains consistent with the aforementioned embodiment. The gas generating device 20 includes a first gas generator 21, a release device 22, a gas-water mixer 23, and a water circulator 24. The housing 10 also has a transition zone 19 communicating with the dissolved gas flotation zone 12. The release device 22 is fixedly inserted inside the dissolved gas release zone 11, and its end has multiple extended rods in an extended state. Each extended rod has evenly distributed air outlet holes on its surface. The first gas generator 21 is connected to the release device 22 through the gas-water mixer 23. The first gas generator 21 is used to supply air to the gas-water mixer 23, and the gas-water mixer 23 is used to supply gas-water mixed fluid to the release device 22. One end of the water circulator 24 is connected to the transition zone 19, and the other end is connected to the gas-water mixer 23, forming a gas-water circulation loop. A third one-way valve 25 is installed on the fluid channel of the water circulator 24. The conduction direction of this one-way valve is consistent with the flow direction of the circulating fluid, allowing only the water in the transition zone 19 to flow unidirectionally towards the gas-water mixer 23. During operation, the gas generated by the first gas generator 21 enters the gas-water mixer 23 and mixes thoroughly with the water drawn from the transition zone 19 by the water circulator 24 to form a gas-water mixture. The gas-water mixture is then transported to the release device 22 through a pipeline and then releases tiny bubbles evenly into the wastewater in the dissolved gas release zone 11 through the gas outlet on the extended rod. The bubbles combine with suspended pollutants in the wastewater and enter the flotation zone 12 to complete the flotation separation. Meanwhile, the third one-way valve 25 blocks the reverse flow of fluid during the water circulation process, ensuring the stable operation of the circulation loop.

[0032] This technical solution effectively solves the technical problems of uneven bubble release, insufficient gas-water mixing leading to low flotation efficiency, and backflow affecting treatment stability during water circulation in traditional gas-generating devices 20 by optimizing the structure of the gas generating device 20 and setting the third one-way valve 25. This results in improved flotation separation effect and enhanced device operational reliability. To address the issue of uneven bubble release, multiple extended rods at the end of the releaser 22 increase the coverage area of ​​bubble release. Combined with evenly distributed air outlets on the extended rods, this allows the gas-water mixture to release a large number of uniformly dispersed microbubbles into the wastewater, significantly increasing the contact area and collision probability between the bubbles and suspended pollutants, thus improving the adsorption and flotation efficiency of pollutants. The gas-water mixer 23 ensures thorough mixing of gas and water, avoiding the problem of excessively large and easily broken bubbles caused by separate gas delivery, further optimizing the flotation effect. To address the issue of water backflow, the third one-way valve 25 strictly restricts fluid flow to a single direction only, from the transition zone 19 to the air-water mixer 23. This prevents the air-water mixture in the air-water mixer 23 from flowing back into the transition zone 19, avoiding disturbance of the water in the flotation zone 12 and the re-diffusion of separated pollutants, thus ensuring the separation effect of the flotation zone 12. Simultaneously, the water circulator 24 recirculates a portion of the water from the flotation zone 12 to the air-water mixer 23, improving water resource utilization and reducing external water replenishment requirements. Ultimately, through the synergistic effect of optimized bubble release, thorough air-water mixing, and stable circulation control, the flotation separation efficiency and overall operational stability of wastewater pretreatment are significantly improved, further ensuring effluent quality.

[0033] The portable wastewater pretreatment device also includes a second gas generator 70, which is used to ventilate the coagulation zone 13 and the flocculation zone 14. In this embodiment, the portable wastewater pretreatment device adds a second gas generator 70 to the original structure; the remaining structure is consistent with the aforementioned embodiment. The second gas generator 70 is fixedly installed on the outside of the housing 10 or in a pre-reserved installation position inside. It is connected to the coagulation zone 13 and the flocculation zone 14 respectively through two sets of independent ventilation pipes. The outlet end of the ventilation pipe extends to the middle or lower part of the corresponding area, and the outlet end has multiple small ventilation holes to achieve uniform gas release. During the operation of the device, the second gas generator 70 starts simultaneously with the coagulation and flocculation reactions, continuously introducing an appropriate amount of gas into the coagulation zone 13 and the flocculation zone 14. After the gas is released through the vent, it forms tiny bubbles. As the bubbles rise, they gently stir the wastewater and coagulant in the coagulation zone 13 and the wastewater and flocculant in the flocculation zone 14, without compromising the stability of the reaction system. This ensures that the wastewater and the reagents are in full contact in the dynamic environment, thus completing the efficient coagulation and flocculation reactions.

[0034] This technical solution, by adding a second gas generator 70 and introducing air into the coagulation zone 13 and flocculation zone 14, effectively solves the technical problems of uneven mixing of wastewater and reagents and low reaction efficiency in traditional coagulation and flocculation processes, resulting in insufficient floc formation and small particle size, which in turn affects the subsequent sedimentation and separation effect. Ultimately, it achieves the technical effects of improving coagulation and flocculation reaction efficiency, optimizing floc quality, and enhancing solid-liquid separation. In traditional treatment, the coagulation zone 13 and flocculation zone 14 rely heavily on the natural flow of wastewater for mixing, which can easily lead to localized excessively high or low reagent concentrations and incomplete contact between wastewater and reagents, resulting in incomplete reactions and loose flocs that are difficult to settle. The gas introduced through the second gas generator 70 forms microbubbles, which promote rapid and uniform mixing of wastewater and coagulant in the coagulation zone 13, shortening the coagulation reaction time and enabling pollutants to quickly form primary micro-floc nuclei. In the flocculation zone 14, the disturbance effect of rising bubbles allows the primary floc nuclei to fully contact the flocculant, promoting the rapid aggregation and growth of flocs into larger and denser flocs, laying the foundation for rapid solid-liquid separation in the subsequent sedimentation zone 16. Simultaneously, the gentle agitation generated during the aeration process does not damage the already formed floc structure, avoiding the floc breakage problems that may occur with mechanical agitation. This ensures the sufficiency of the coagulation and flocculation reaction and improves the stability of the reaction products, ultimately accelerating the sludge settling speed in the subsequent sedimentation zone 16, resulting in more thorough separation of clear water and sludge, and further improving the wastewater pretreatment efficiency and effluent purity of the entire device.

[0035] The mobile wastewater pretreatment device includes a sludge treatment device 80, which is connected to a sludge thickening zone 18. The sludge treatment device 80 is equipped with a fourth one-way valve 81. This embodiment of the mobile wastewater pretreatment device adds the sludge treatment device 80 to the existing structure, while the rest of the structure remains consistent with the aforementioned embodiment. The sludge treatment device 80 is fixedly installed outside the housing 10 or integrated into one side of the housing 10. It is connected to the bottom or side wall of the sludge thickening zone 18 via a conveying pipe, and is used to further treat the scum and sludge collected in the sludge thickening zone 18 (e.g., dewatering, volume reduction, etc.). The fourth one-way valve 81 is installed on the conveying pipe connecting the sludge treatment device 80 and the sludge thickening zone 18. Its direction of flow is consistent with the direction of solid waste transport, allowing only unidirectional flow of mixed solid waste from the sludge thickening zone 18 to the sludge treatment device 80. During the operation of the device, the scum and sludge collected in the sludge thickening zone 18 are concentrated by sedimentation and then flow to the sludge treatment device 80 through the conveying pipeline under the action of gravity or pumping power. At this time, the fourth check valve 81 automatically opens under the action of fluid pressure to ensure that the solid waste smoothly enters the sludge treatment device 80 for treatment. When the solid waste conveying stops or the pressure inside the sludge treatment device 80 changes, the fourth check valve 81 automatically closes to prevent the material inside the sludge treatment device 80 or the external fluid from flowing back into the sludge thickening zone 18, thus ensuring the normal working environment of the sludge thickening zone 18.

[0036] This technical solution effectively solves the technical problems of the traditional device, which requires the solid waste of the sludge concentration zone 18 to be transferred to external equipment for treatment, is cumbersome and inefficient, and is prone to backflow and secondary pollution during solid waste transfer or treatment, by adding a sludge treatment device 80 connected to the sludge concentration zone 18 and installing a fourth one-way valve 81 on the connecting pipeline. This achieves the technical effects of integrated solid waste treatment, reduced transfer costs, and a more environmentally friendly treatment process. To address the issue of additional solid waste transportation, the sludge treatment unit 80 is directly connected to the sludge thickening zone 18. This allows the thickened scum and sludge to be directly transferred into the sludge treatment unit 80 for dewatering and volume reduction without the need for manual or external equipment transfer. This significantly shortens the solid waste treatment process, improves overall treatment efficiency, and reduces the risk of leakage during transportation. Regarding backflow, the fourth one-way valve 81, through its one-way conduction characteristic, strictly prevents the backflow of treated materials or external impurities from the sludge treatment unit 80 into the sludge thickening zone 18. This avoids secondary pollution of the solid waste in the sludge thickening zone 18 or damage to the treatment environment, ensuring the effective collection and thickening of scum and sludge in the sludge thickening zone 18. Furthermore, the integrated design of the sludge treatment unit 80 further enhances the integration of the entire pretreatment unit. Combined with the unit's portability, it achieves integrated operation of "sewage pretreatment - centralized solid waste treatment," making it particularly suitable for temporary discharge points and emergency treatment scenarios. This reduces the complexity of on-site operations and environmental risks, ultimately optimizing the practicality and environmental performance of the unit.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, when an element is referred to as 'fixed to' or 'set on' another element, it may be directly attached to that element, or there may be other intervening elements between them. When an element is referred to as 'connected to' another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, the designation of features such as "first" and "second" can either explicitly express or imply the presence of at least one such feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A mobile wastewater pretreatment device, characterized in that, The mobile wastewater pretreatment device includes: The tank includes a dissolved air release zone, an air flotation zone, a coagulation zone, a flocculation zone, a sludge collection zone, a sedimentation zone, a water purification zone, and a sludge thickening zone arranged sequentially. The dissolved air release zone is provided with a wastewater inlet. The sludge collection zone is used to collect sludge from the air flotation zone. The flocculation zone and the coagulation zone are connected by a first through hole in a partition between them. The sedimentation zone and the water purification zone are connected by a second through hole in a partition between them. The water purification zone is provided with a water purification outlet. A gas generating device is inserted into the dissolved gas release zone to release gas bubbles; The water collection device is connected to the air flotation zone and the coagulation zone respectively; A flow guiding device is connected to both the flocculation zone and the sedimentation zone; A sludge discharge device is connected to both the sludge collection area and the sludge thickening area, and the sludge discharge device is used to discharge the sludge from the sludge collection area; and The sludge discharge device is connected to both the sedimentation zone and the sludge concentration zone, and is used to discharge the sludge from the sedimentation zone.

2. The mobile wastewater pretreatment device according to claim 1, characterized in that, The slag discharge device is equipped with a first check valve, and the sludge discharge device is equipped with a second check valve.

3. The mobile wastewater pretreatment device according to claim 1, characterized in that, The first through hole is located near the bottom of the housing, and the second through hole is located near the top of the housing.

4. The mobile wastewater pretreatment device according to claim 1, characterized in that, The gas generating device includes a first gas generator and a releaser. The releaser is disposed in the dissolved gas release zone. The end of the releaser is provided with a plurality of extended rods, and the extended rods are provided with gas outlet holes. The first gas generator is connected to the releaser.

5. The mobile wastewater pretreatment device according to claim 4, characterized in that, The gas generating device includes a gas-water mixer and a water circulator. The housing also has a transition zone that communicates with the air flotation zone. The first gas generator is connected to the release device through the gas-water mixer. The water circulator is connected to the transition zone and the gas-water mixer respectively. The water circulator is equipped with a third one-way valve.

6. The mobile wastewater pretreatment device according to claim 1, characterized in that, The mobile wastewater pretreatment device also includes a second gas generator, which is used to circulate air into the coagulation zone and the flocculation zone.

7. The mobile wastewater pretreatment device according to claim 1, characterized in that, The mobile wastewater pretreatment device includes a sludge treatment device, which is connected to the sludge thickening zone, and the sludge treatment device is equipped with a fourth one-way valve.

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