Wastewater treatment equipment

Abstract

The utility model provides wastewater treatment equipment for treating box washing wastewater of a cold-chain transportation container. The wastewater treatment equipment comprises a box body, an air floatation tank is arranged in the box body, a water outlet of the air floatation tank is sequentially connected with a middle water tank, a multi-stage purification and filtration device and a clean water tank through pipelines, a sewage outlet of the air floatation tank is sequentially connected with a sludge tank and a filter press through pipelines, and the filter press discharges sewage out of the box body through a waste liquid collection pipe; wherein the air floatation tank, the middle water tank, the multi-stage purifying and filtering device and the clean water tank are arranged along the length direction of the box body; the air floatation tank, the sludge tank and the filter press are arranged along the length direction of the box body; the waste liquid collecting pipe is located on one side of the box body in the width direction. The wastewater treatment equipment is integrated in the box body to form a compact and efficient wastewater treatment system, so that the occupied area is saved, and the equipment is convenient to mount, debug and maintain. The waste liquid collecting pipe is positioned on one side of the width direction of the box body, so that concentrated discharge and subsequent treatment of the sludge are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of cold-chain container washing wastewater treatment, and more specifically to a wastewater treatment device. Background Art

[0002] Currently, the main sources of the washing wastewater of cold-chain transportation containers are SS, COD, and animal and vegetable oils. The low degree of integration of the existing port sewage treatment facilities leads to too large a floor space required, affecting the normal transportation of the port.

[0003] Therefore, a wastewater treatment device is needed to at least partially solve the above problems. Summary of the Utility Model

[0004] A series of simplified concepts are introduced in the summary of the utility model part, which will be further described in detail in the specific implementation part. The summary of the utility model part of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To at least partially solve the above problems, the present utility model provides a wastewater treatment device for the washing wastewater of cold-chain transportation containers, including a box body. An air flotation tank is arranged in the box body. The water outlet of the air flotation tank is connected to an intermediate water tank, a multi-stage purification and filtration device, and a clean water tank in sequence through pipelines. The sewage outlet of the air flotation tank is connected to a sludge tank and a filter press in sequence through pipelines. The filter press discharges the sewage out of the box body through a waste liquid collection pipe; wherein,

[0006] The air flotation tank, the intermediate water tank, the multi-stage purification and filtration device, and the clean water tank are arranged along the length direction of the box body;

[0007] The air flotation tank, the sludge tank, and the filter press are arranged along the length direction of the box body;

[0008] The waste liquid collection pipe is located on one side in the width direction of the box body.

[0009] According to the wastewater treatment device of the present utility model, the wastewater treatment device integrates components such as an air flotation tank, an intermediate water tank, a multi-stage purification and filtration device, a clean water tank, a sludge tank, and a filter press in a box body, forming a compact and efficient wastewater treatment system, which not only saves the floor space, but also facilitates the installation, commissioning, and maintenance of the device. The flow path of the wastewater from the air flotation tank to the clean water tank is more direct and smooth, reducing the detour and stagnation of the wastewater during the treatment process, thereby improving the treatment efficiency. The waste liquid collection pipe is located on one side in the width direction of the box body, facilitating the centralized discharge and subsequent treatment of the sludge.

[0010] Optionally, the air flotation tank, the sludge tank, the intermediate water tank, the multi-stage purification and filtration device, the clear water tank and the filter press are arranged in sequence along the length direction.

[0011] Optionally, the air flotation tank, the intermediate water tank, the multi-stage purification and filtration device, the sludge tank, the clear water tank and the filter press are respectively connected to the waste liquid collection pipe through pipelines;

[0012] The waste liquid collection pipe is located on one side of the air flotation tank, the intermediate water tank, the multi-stage purification and filtration device, the sludge tank, the clear water tank and the filter press along the width direction of the box body.

[0013] Optionally, the clear water tank discharges clear water out of the box body through a recycled water pipe, and the recycled water pipe and the waste liquid collection pipe are on the same side of the box body in the width direction; and / or

[0014] The air flotation tank and the sludge tank are connected by a first sludge pipe, and the first sludge pipe and the waste liquid collection pipe are on the same side of the box body in the width direction; and / or

[0015] The sludge tank and the filter press are connected by a second sludge pipe, and the second sludge pipe and the waste liquid collection pipe are on the same side of the box body in the width direction.

[0016] Optionally, the box body is provided with an entrance, and an external pipeline extends from the entrance into the box body; wherein,

[0017] The entrance is arranged close to the air flotation tank.

[0018] Optionally, the box body is provided with a door body, and the door body is arranged close to the filter press.

[0019] Optionally, it further includes a chemical dosing device, wherein,

[0020] The chemical dosing device is located on the other side of the box body in the width direction; and / or

[0021] The chemical dosing device includes a PAC dosing device and a PAM dosing device.

[0022] Optionally, it further includes a tap water pipe, the tap water pipe extends into the box body through the entrance, and the tap water pipe is communicated with the chemical dosing device.

[0023] Optionally, a pump is arranged between the sludge tank and the filter press; and / or

[0024] A pump is arranged between the intermediate water tank and the multi-stage purification and filtration device.

[0025] Optionally, the multi-stage purification and filtration device includes a sand filter and a carbon filter, and the carbon filter is located downstream of the sand filter. Description of the Drawings

[0026] The following drawings of the embodiments of the present utility model are hereby taken as a part of the present utility model for understanding the present utility model. The embodiments of the present utility model shown in the drawings and their descriptions are used to explain the principles of the present utility model. In the drawings,

[0027] Figure 1 is a schematic diagram of a wastewater treatment device of the present utility model.

[0028] Explanation of Reference Numerals

[0029] 10: Box body

[0030] 11: Inlet

[0031] 12: Door body

[0032] 20: Air flotation tank

[0033] 21: Dissolved air tank

[0034] 30: Intermediate water tank

[0035] 40: Multi-stage purification and filtration device

[0036] 41: Sand filter

[0037] 42: Carbon filter

[0038] 43: Lift pump

[0039] 50: Clear water tank

[0040] 51: Reclaimed water pump

[0041] 60: Sludge tank

[0042] 70: Filter press

[0043] 71: Screw pump

[0044] 80: Chemical dosing device

[0045] 81: PAC dosing pipe

[0046] 82: PAM dosing pipe

[0047] 83: Chemical agent stack

[0048] 90: Electrical control equipment

[0049] 110: Tap water pipe

[0050] 120: Wastewater inlet pipe

[0051] 130: Reclaimed water pipe

[0052] 140: Waste liquid collection pipe

[0053] 151: First sludge pipe

[0054] 152: Second sludge pipe

[0055] DL: Length direction

[0056] DW: Width direction Detailed implementation manners

[0057] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it will be apparent to those skilled in the art that the embodiments of the present utility model may be practiced without one or more of these details. In other instances, some well-known technical features are not described to avoid confusion with the embodiments of the present utility model.

[0058] In this document, ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0059] In this document, "upper", "lower", "front", "rear", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than defining the absolute positions of these relevant parts.

[0060] In this document, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include allowable errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0061] Unless otherwise specified, the numerical ranges in this document include not only the entire range between its two endpoints, but also several sub-ranges included therein.

[0062] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present utility model is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art.

[0063] Refer to Figure 1 , the present utility model provides a wastewater treatment device for treating the wastewater from washing cold chain transportation containers.

[0064] The wastewater treatment equipment includes a box body 10. An air flotation tank 20 is arranged inside the box body 10. The water outlet of the air flotation tank 20 is sequentially connected to an intermediate water tank 30, a multi-stage purification and filtration device 40, and a clean water tank 50 through pipelines. The sewage outlet of the air flotation tank 20 is sequentially connected to a sludge tank 60 and a filter press 70 through pipelines. The filter press 70 discharges the sewage out of the box body 10 through a waste liquid collection pipe 140. The wastewater treatment equipment integrates components such as the air flotation tank 20, the intermediate water tank 30, the multi-stage purification and filtration device 40, the clean water tank 50, the sludge tank 60, and the filter press 70 in a box body 10, forming a compact and efficient wastewater treatment system, which not only saves the floor area but also facilitates the installation, debugging, and maintenance of the equipment.

[0065] In the present utility model, the positions of the equipment inside the box body 10 are optimized and arranged, making full use of the space of the box body 10, so that the overall structure of the equipment is compact and the floor area is small. Each treatment unit is relatively independent but closely connected, facilitating the modular production and on-site assembly of the equipment, and also facilitating the subsequent maintenance of each equipment. Specifically, the air flotation tank 20, the intermediate water tank 30, the multi-stage purification and filtration device 40, and the clean water tank 50 are arranged along the length direction DL of the box body 10; the air flotation tank 20, the sludge tank 60, and the filter press 70 are arranged along the length direction DL of the box body 10. This makes the flow path of the wastewater from the air flotation tank 20 to the clean water tank 50 more direct and smooth, reducing the detour and stagnation of the wastewater during the treatment process, thereby improving the treatment efficiency. The waste liquid collection pipe 140 is located on one side of the width direction DW of the box body 10, facilitating the centralized discharge and subsequent treatment of the sludge.

[0066] Optionally, the waste liquid collection pipe 140 is located on one side of the width direction DW of the box body 10.

[0067] Optionally, the air flotation tank 20, the sludge tank 60, the intermediate water tank 30, the multi-stage purification and filtration device 40, the clean water tank 50, and the filter press 70 are arranged in sequence along the length direction DL. The sequential arrangement of each treatment unit along the length direction DL makes the wastewater treatment process smoother. The wastewater enters from the air flotation tank 20, passes through each treatment unit in sequence, and finally enters the clean water tank 50, realizing the continuous and efficient treatment of the wastewater. Moreover, the wastewater does not need to be frequently transferred between each treatment unit, reducing the energy consumption and pollution risk during the transfer process and improving the treatment efficiency.

[0068] In the present utility model, the outlet of the air flotation tank 20 is respectively connected to the sludge tank 60 and the intermediate water tank 30. The sludge tank 60 and the intermediate water tank 30 are arranged along the length direction DL, and the sludge tank 60 is arranged close to the air flotation tank 20, shortening the conveying distance of the scum and sediment in the air flotation tank 20, enabling the scum and sediment to quickly drain from the air flotation tank 20 into the sludge tank 60, improving the treatment efficiency. At the same time, the residence time of the sewage in the air flotation tank 20 is reduced, making the treatment process more compact, which is conducive to accelerating the treatment speed of the entire sewage treatment system. The flow path of the wastewater in the system is smoother, reducing the resistance and energy consumption that may be generated due to complex pipelines.

[0069] Furthermore, the air flotation tank 20, the intermediate water tank 30, the multi-stage purification and filtration device 40, the sludge tank 60, the clear water tank 50 and the filter press 70 are respectively connected to the waste liquid collection pipe 140 through pipelines; the waste liquid collection pipe 140 can collect the waste liquid of multiple devices such as the air flotation tank 20, the intermediate water tank 30, the multi-stage purification and filtration device 40, the sludge tank 60, the filter press 70 and the clear water tank 50. Optionally, the waste liquid collection pipe 140 is located on one side of the air flotation tank 20, the intermediate water tank 30, the multi-stage purification and filtration device 40, the sludge tank 60, the filter press 70 and the clear water tank 50 along the width direction DW of the box body 10, and extends from the filter press 70 to the air flotation tank 20 and extends outside the box body 10. That is, the waste liquid collection pipe 140 starts from the filter press 70, passes through the clear water tank 50, the multi-stage purification and filtration device 40, the intermediate water tank 30, the sludge tank 60, the air flotation tank 20 and then extends outside the box body 10. Among them, the connection between the air flotation tank 20, the intermediate water tank 30, the clear water tank 50 and the waste liquid collection pipe 140 facilitates emptying during maintenance. The air flotation tank 20, the intermediate water tank 30, the clear water tank 50 and the filter press 70 share the same waste water main pipe, which not only saves pipeline space and cost, but also avoids the complexity of pipeline layout, and it is not easy to deposit and scale in the pipeline.

[0070] Optionally, the clear water tank 50 discharges the clear water out of the box body 10 through the recycled water pipe 130, and the recycled water pipe 130 is located on one side of the box body 10 in the width direction DW. Specifically, the recycled water pipe 130 and the waste liquid collection pipe 140 are located on the same side of the box body 10 in the width direction DW.

[0071] Optionally, the air flotation tank 20 and the sludge tank 60 are connected by a first sludge pipe 151, and the first sludge pipe 151 is located on one side of the box body 10 in the width direction DW. Specifically, the first sludge pipe 151 and the waste liquid collection pipe 140 are located on the same side of the box body 10 in the width direction DW.

[0072] Optionally, the sludge tank 60 and the filter press 70 are connected by a second sludge pipe 152, and the second sludge pipe 152 is located on one side of the box body 10 in the width direction DW. Specifically, the second sludge pipe 152 and the waste liquid collection pipe 140 are located on the same side of the box body 10 in the width direction DW.

[0073] In the present utility model, the recycled water pipe 130, the first sludge pipe 151, the second sludge pipe 152 and the waste liquid collection pipe 140 are arranged on the same side, reducing the space occupied by the pipes in the width direction DW of the box body 10, making the overall layout more compact. At the same time, it is convenient for subsequent unified discharge and treatment, improving the treatment efficiency.

[0074] Optionally, the waste water inlet pipe 120 is connected to the air flotation tank 20 for conveying waste water into the air flotation tank 20.

[0075] Optionally, the tap water pipe 110 is connected to the chemical dosing device 80 for conveying tap water into the chemical dosing device 80.

[0076] Optionally, the box body 10 is provided with an inlet 11 concentrated in one area. Exemplarily, the inlet 11 is centrally arranged at one end of the box body 10 along the length direction DL. Optionally, the number of inlets 11 is adaptively set according to the pipe diameter and number of the connected pipelines. The external pipelines extend from the inlet 11 into the box body 10. Specifically, there are four inlets 11, and the four inlets are respectively connected to the recycled water pipe 130, the waste liquid collection pipe 140, the waste water inlet pipe 120 and the tap water pipe 110. All pipelines that need to be connected to the box body 10 are connected through the inlets 11 located in the same area, reducing the number of external connectors and pipelines, lowering the complexity and failure rate of the system. At the same time, it makes it more convenient for the operator to connect and disconnect the pipelines, facilitating the daily maintenance and repair of the pipelines.

[0077] The washing wastewater of the cold chain transportation container may contain various pollutants such as oil stains, detergent residues, microorganisms, and suspended solids.

[0078] The waste water to be treated in the waste water inlet pipe is introduced into the air flotation tank 20. The effluent of the air flotation tank 20 is collected in the intermediate water tank 30 through a pipeline via the water outlet. The sewage in the intermediate water tank 30 is conveyed to the filtration module, namely the sand filter tank and the carbon filter tank, for step-by-step treatment by the lift pump 43 in the intermediate water tank 30. The effluent of the carbon filter tank flows into the clean water tank 50, and the clean water in the clean water tank 50 is discharged out of the box body 10 through the recycled water pump 51 via the recycled water pipe 130 for secondary reuse. The sludge in the air flotation tank 20 is collected into the sludge tank 60 through a pipeline via the sewage outlet. The sludge in the sludge tank 60 is pumped to the plate and frame filter press 70 through a screw pump and a sludge conveying pipe for dehydration treatment. The dehydrated waste liquid is conveyed outside the box through the waste liquid collection pipe 140 via the water inlet. Optionally, the dehydrated waste liquid enters the waste water treatment equipment for re-treatment.

[0079] The air flotation tank 20 has a good effect on removing suspended solids and grease in wastewater. The air flotation tank 20 uses polyaluminum chloride (PAC) and polyacrylamide (PAM) as coagulants. PAC and PAM provide coagulation effects for air flotation reactions and sludge conditioning, strengthen the reaction effect, and improve the efficiency of air flotation water treatment.

[0080] Optionally, the air flotation tank 20 treats pollutants through a dissolved air tank 21. The dissolved air water generated by the air flotation tank 20 through the dissolved air tank 21 can efficiently capture and adsorb suspended particles and pollutants in the water body through the release device, significantly improving the treatment efficiency.

[0081] Optionally, the air flotation tank 20 is connected to the waste liquid collection pipe 140 through a pipeline, facilitating the discharge of waste liquid through the waste liquid collection pipe 140 from the box body 10 during maintenance.

[0082] The wastewater treated by the air flotation tank 20 enters the intermediate water tank 30 and is further treated by a multi-stage purification and filtration device 40. Optionally, the multi-stage purification and filtration device 40 includes a sand filter 41 and a carbon filter 42. Optionally, the carbon filter 42 is located downstream of the sand filter 41. The wastewater first passes through the sand filter 41 for preliminary filtration to remove larger suspended solids, particulate matters, and impurities. Subsequently, the preliminarily purified wastewater enters the carbon filter 42 for in-depth treatment. This step-by-step filtration method can more effectively remove pollutants in the wastewater, improve the overall purification effect, increase the overall treatment efficiency, and increase the wastewater treatment volume.

[0083] The multi-stage purification and filtration device 40 can further remove fine suspended solids and dissolved pollutants in the wastewater, helping to improve the purification effect of the wastewater and making it meet the discharge standard or reuse requirements.

[0084] Optionally, a pump is provided before the multi-stage purification and filtration device 40. Optionally, the pump uses a lift pump 43. The lift pump 43 can ensure that the wastewater enters the multi-stage purification and filtration device 40 in a timely and stable manner, avoiding a decrease in treatment efficiency caused by insufficient flow or interruption, and thus being able to adapt to a large wastewater treatment volume.

[0085] Optionally, the sand filter 41 and the carbon filter 42 in the multi-stage purification and filtration device 40 are respectively connected to the waste liquid collection pipe 140 through pipelines, facilitating the discharge of waste liquid through the waste liquid collection pipe 140 from the box body 10 during maintenance.

[0086] The sludge generated by the air flotation tank 20 enters the sludge tank 60 through the first sludge pipe 151 for preliminary collection, and then is dehydrated by the filter press 70. During the wastewater treatment process in the air flotation tank 20, a scum layer is formed through the adhesion of microbubbles to pollutants such as suspended particles and grease. After the scum layer is collected by equipment such as a scum scraper, it is transported to the sludge tank 60 through a pipeline. Since cold chain containers carry a large amount of foods such as meat, the sludge generated from sewage treatment is general solid waste and does not involve hazardous waste.

[0087] As a preliminary collection container for sludge, the sludge tank 60 can temporarily store the sludge from the air flotation tank 20 and other wastewater treatment units that may generate sludge. After the preliminary collection in the sludge tank 60, the moisture content in the sludge is still relatively high, which is not convenient for subsequent transportation and disposal. Therefore, dehydration treatment is required through equipment such as the filter press 70. The sludge tank 60 is connected to the filter press 70 through the second sludge pipe 152.

[0088] The filter press 70 squeezes out the moisture in the sludge through mechanical force to form a sludge cake with a lower moisture content, which is convenient for subsequent treatment or disposal. By reducing the volume of the sludge, the transportation and treatment costs of the sludge are reduced. The sludge after being treated by the filter press 70 is discharged from the box body 10 through the sludge pipe, realizing the continuous and efficient treatment of the sludge.

[0089] Optionally, the door 12 of the box body 10 is arranged on one side of the box body 10 close to the filter press 70 in the length direction DL, which is convenient for transporting the sludge cake out of the box body 10.

[0090] Optionally, the wastewater treatment equipment further includes a dosing device 80. The dosing device 80 includes a PAC dosing device and a PAM dosing device. The PAC dosing device is connected to the air flotation tank 20 through the PAC dosing pipe 81 and is used to supply PAC to the air flotation tank 20. The PAM dosing device is connected to the air flotation tank 20 through the PAM dosing pipe 82 and is used to supply PAM to the air flotation tank 20. Optionally, the dosing device 80 can perform continuous dosing of the drug. The continuous dosing function of the dosing device 80 ensures the stability of the chemical agent concentration in the air flotation tank 20 and avoids the problem of unstable treatment effect caused by fluctuations in the chemical agent concentration.

[0091] Optionally, the dosing device 80 is located on the other side of the box body 10 in the width direction DW. That is, the dosing device 80 and pipelines such as the waste liquid collection pipe 140 and the reclaimed water pipe 130 are located on different sides of the box body 10 along the width direction DW. Therefore, the space of the box body 10 can be fully utilized, the mutual interference between equipment can be reduced, and the rationality and compactness of the overall layout can be improved. This layout makes the maintenance and management of the equipment more convenient. For example, when overhauling or replacing the dosing device 80, it is not necessary to interrupt the operation of the waste liquid collection or the reclaimed water pipe 130, improving the maintainability and reliability of the equipment.

[0092] Optionally, the chemical agent stack 83 is located near the chemical dosing device 80. Specifically, the chemical agent stack 83 and the chemical dosing device 80 are located on the same side of the box body 10 along the width direction DW, simplifying the handling and dosing process of the materials. The operator can more conveniently take chemicals from the chemical agent stack 83 and directly dose them into the chemical dosing device 80, reducing the need to cross the box body 10 or carry them over a long distance.

[0093] In the present utility model, the wastewater treatment equipment further includes an electric control device 90. The electric control device 90 can control the start and stop of the wastewater treatment system. Through a preset program or operation interface, the operator can conveniently start or stop the entire system to achieve remote or on-site control of the equipment. The electric control device 90 allows the operator to set and adjust various parameters required for system operation, such as the influent flow rate, the operating frequency of the pump, the chemical dosing amount, etc.

[0094] Specifically, the electric control device 90 is electrically connected or communicatively connected to the dissolved air tank 21, the lift pump 43, the screw pump 71, the reclaimed water pump 51, the filter press 70, and the chemical dosing device 80 respectively, so as to realize the control of equipment such as electromechanical devices and water pumps.

[0095] The electric control device 90 can control the on-off states and operating parameters of various pumps and valves in the wastewater treatment system. By precisely controlling parameters such as the flow rate, head of the pump, and the opening degree of the valve, it can ensure the smooth flow and reasonable distribution of wastewater in the system.

[0096] The following is illustrated by specific examples:

[0097] An integrated equipment for treating the cleaning wastewater of a seaport cold chain transportation container:

[0098] Dimensions: length × width × height = 12192 × 2438 × 2896 mm.

[0099] Self-weight: 10.5 T, operating weight: 110 T.

[0100] Material: weathering steel SPA-H.

[0101] Structural composition: dissolved air flotation tank 20, intermediate water tank 30, filtration module, sludge dewatering module, chemical dosing module, electric control unit.

[0102] The designed treatment capacity of this embodiment is 15 m 3 / d. According to the environmental protection requirements of the project location, the cleaning wastewater of the box body 10 is required to be treated to achieve the requirement of reuse, that is, to meet the standards of "toilet flushing, vehicle washing" in "Urban Sewage Reuse - Urban Miscellaneous Water Quality" (GB / T 18920 - 2020), and is discharged into the reclaimed water system of the wharf after treatment.

[0103] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the technical field of the present utility model. The terms used herein are for the purpose of describing specific implementation objectives only and are not intended to limit the present utility model. Terms such as "arranged" that appear herein can either mean that one component is directly attached to another component or that one component is attached to another component through an intermediate component. Features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0104] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative and explanatory purposes only and are not intended to limit the present utility model within the scope of the described embodiments. Those skilled in the art can understand that according to the teachings of the present utility model, more variations and modifications can be made, and all of these variations and modifications fall within the scope of protection required by the present utility model.

Claims

1. A wastewater treatment equipment for treating wastewater from cold chain transport container washing, characterized in that: It comprises a box body, in which an air flotation tank is arranged, the water outlet of the air flotation tank is connected to the intermediate water tank, the multi-stage purification and filtration device and the clean water tank in sequence through pipelines, the sewage outlet of the air flotation tank is connected to the sludge tank and the filter press in sequence through pipelines, and the filter press discharges the sewage from the box body through the waste liquid collection pipe; wherein, The air flotation tank, the intermediate water tank, the multi-stage purification and filtration device and the clean water tank are arranged along the length direction of the box; The flotation tank, the sludge tank and the filter press are arranged along the length direction of the box; The waste liquid collecting pipe is located at one side in the width direction of the box body.

2. The wastewater treatment equipment according to claim 1, characterized in that: The flotation tank, the sludge tank, the intermediate water tank, the multi-stage purification and filtration device, the clean water tank and the filter press are arranged in sequence along the length direction.

3. The wastewater treatment equipment according to claim 1 or 2, characterized in that: The flotation tank, the intermediate water tank, the multi-stage purification and filtration device, the sludge tank, the clean water tank and the filter press are respectively connected to the waste liquid collection pipe through pipelines; The waste liquid collecting pipe is located on one side of the flotation tank, the intermediate water tank, the multi-stage purification and filtering device, the sludge tank, the clean water tank and the filter press along the width direction of the box.

4. The wastewater treatment equipment according to claim 1, characterized in that: The clean water tank discharges clean water from the box body through a recycling water pipe, and the recycling water pipe and the waste liquid collection pipe are located on the same side of the box body in the width direction; and / or The flotation tank is connected to the sludge tank via a first sludge pipe, and the first sludge pipe and the waste liquid collection pipe are located on the same side in the width direction of the box; and / or The sludge tank is connected to the filter press via a second sludge pipe, and the second sludge pipe and the waste liquid collecting pipe are located on the same side of the box in the width direction.

5. The wastewater treatment equipment according to claim 1, characterized in that: The box body is provided with an inlet, and an external pipeline extends from the inlet into the box body; wherein, The inlet is arranged close to the flotation tank.

6. The wastewater treatment equipment according to claim 1, characterized in that: The box body is provided with a door body, and the door body is arranged close to the filter press.

7. The wastewater treatment equipment according to claim 1, characterized in that: Also includes a dosing device, wherein The dosing device is located on the other side of the box in the width direction; and / or The dosing device includes a PAC dosing device and a PAM dosing device.

8. The wastewater treatment equipment according to claim 7, characterized in that: It also includes a tap water pipe, which extends into the box through an inlet and is connected to the dosing device.

9. The wastewater treatment equipment according to claim 1, characterized in that: A pump is provided between the sludge tank and the filter press; and / or A pump is provided between the intermediate water pool and the multi-stage purification and filtering device.

10. The wastewater treatment equipment according to claim 1, characterized in that: The multi-stage purification and filtering device comprises a sand filter and a carbon filter, wherein the carbon filter is located downstream of the sand filter.

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