A recycling system and recycling method applied to a car washing room of an indoor parking lot

Abstract

This application discloses a recycling system and method. The recycling system has a water filtration mode and an abrasive recycling mode. In the water filtration mode, the mixed waste liquid flows into the water recycling component after being filtered by the filtration structure, achieving water recycling. At this time, the abrasive in the mixed waste liquid can be collected at the filtration structure. When the abrasive recycling mode is activated, the flushing component flushes the abrasive collected at the filtration structure into the abrasive recycling component, achieving abrasive recycling. This recycling system can simultaneously recycle water and abrasive. Moreover, the water filtration mode can enrich the abrasive in the mixed waste liquid at the filtration structure while completing water filtration and recycling, which can improve the flushing efficiency of the flushing component for abrasive in the abrasive recycling mode and save flushing time.

Description

Technical Field

[0001] This application relates to the field of vehicle cleaning, specifically to a recycling system and method for a car wash in an indoor parking lot. Background Technology

[0002] In some car wash processes, abrasive particles are added to the wash water to enhance its stain removal capabilities. Since abrasives are expensive, directly discharging the wastewater (a mixture of abrasive and water) after the car wash would significantly increase costs. In traditional car washes, existing wastewater recycling solutions typically only perform uniform filtration or sedimentation of the wastewater, making it difficult to effectively distinguish between abrasive particles and dirt impurities. This results in the abrasives being difficult to reuse and affects wastewater recycling efficiency. Summary of the Invention

[0003] This application provides a recycling system and method for a car wash in an indoor parking lot, for the purpose of recycling abrasives after car washing.

[0004] To achieve one of the above objectives, one embodiment of this application provides a recycling system for a car wash in an indoor parking lot, comprising:

[0005] A water collection tank having a water collection chamber for collecting mixed wastewater generated during vehicle washing, the mixed wastewater comprising abrasive and water;

[0006] A first filter assembly having a filter structure for separating water and abrasive in the mixed sludge, and the water collection tank being connected to the first filter assembly;

[0007] A water recovery assembly, which is connected to the first filtration assembly, is used to recover water filtered by the filtration structure.

[0008] An abrasive recovery assembly, which is connected to the first filter assembly, is used to recover the abrasive filtered out by the filter structure.

[0009] A flushing assembly, connected to the first filter assembly, is used to flush the abrasive material gathered in the filter structure into the abrasive recovery assembly;

[0010] and control unit;

[0011] The recycling system has a water filtration mode and an abrasive recycling mode;

[0012] In the water filtration mode, the water collection tank is connected to the first filter component in at least one direction, the flushing component is disconnected from the first filter component in at least one direction, the first filter component is disconnected from the abrasive recovery component in at least one direction, and the first filter component is connected to the water recovery component in at least one direction. The water of the mixed sewage flows from the water collection tank into the filter structure and then into the water recovery component. The abrasive of the mixed sewage is collected at the filter structure.

[0013] In the abrasive recovery mode, the first filter component is connected to the abrasive recovery component in at least one direction and is disconnected from the water recovery component in at least one direction. The flushing component is connected to the first filter component in at least one direction. The flushing component flushes the abrasive that has accumulated at the filter structure into the abrasive recovery component to achieve the recovery of the abrasive.

[0014] The recycling system described in the above embodiment has a water filtration mode and an abrasive recycling mode. In the water filtration mode, the mixed wastewater flows into the water recycling component after being filtered by the filtration structure, achieving water recycling. At this time, the abrasive particles in the mixed wastewater can be collected at the filtration structure. When the abrasive recycling mode is activated, the flushing component flushes the abrasive particles collected at the filtration structure into the abrasive recycling component, achieving abrasive recycling. This recycling system can simultaneously recycle water and abrasive particles. Moreover, the water filtration mode can enrich the abrasive particles in the mixed wastewater at the filtration structure while completing water filtration and recycling, which can improve the flushing efficiency of the flushing component for abrasive particles in the abrasive recycling mode and save flushing time.

[0015] In one embodiment, the flushing assembly includes a flushing pump, the upstream end of which is connected to a flushing water source, and the downstream end of which is connected to the first filter assembly; in the water filtration mode, the flushing pump is disconnected from the first filter assembly in at least one direction; in the abrasive recovery mode, the flushing pump is connected to the first filter assembly in at least one direction.

[0016] In one embodiment, the water recycling assembly has a water receiving container for storing recycled water, and the flushing water source for the flushing pump is the water receiving container or is connected to the water receiving container.

[0017] In one embodiment, the water source is further included for washing the vehicle, and the water recycling assembly has a water receiving container for storing the recycled water, wherein the water source is the water receiving container, or the water receiving container is connected to the water source.

[0018] In one embodiment, a second filter assembly is further included, which is connected between the water collection tank and the first filter assembly. In the water filtration mode, the water collection tank, the second filter assembly, and the first filter assembly are at least in one-way communication, so that the mixed waste liquid can flow from the water collection tank through the second filter assembly to the first filter assembly. The filter pore size of the second filter assembly is larger than that of the first filter assembly and allows abrasive and water in the mixed waste liquid to pass through, so as to perform coarse filtration of the mixed waste liquid.

[0019] In one embodiment, the rinsing assembly is connected to the second filter assembly; in the abrasive recovery mode, the rinsing assembly, the second filter assembly, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive residue in the second filter assembly to the first filter assembly.

[0020] In one embodiment, the system further includes a sedimentation separation unit for separating substances in the mixed sludge that have a significantly different density from water and abrasive particles. The sedimentation separation unit is connected between the water collection tank and the first filter assembly. In the water filtration mode, the water collection tank, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the mixed sludge can flow from the water collection tank through the sedimentation separation unit to the first filter assembly. In the abrasive recovery mode, the rinsing assembly, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive particles remaining in the sedimentation separation unit to the first filter assembly.

[0021] In one embodiment, the sedimentation separation unit includes a vertical flow sedimentator.

[0022] In one embodiment, the rinsing assembly further includes a water collection tank rinsing pipeline. In the abrasive recovery mode, the water collection tank rinsing pipeline, the water collection tank, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the residual abrasive in the water collection tank to the first filter assembly.

[0023] In one embodiment, the water recycling assembly includes a water treatment assembly and a water receiving container. The water treatment assembly has at least one filter layer for filtering the recycled water. The water treatment assembly is in at least one-way communication with the water receiving container so that the water receiving container can recycle the water filtered by the water treatment assembly.

[0024] In one embodiment, the at least one filter layer includes an activated carbon filter layer for adsorbing organic pollutants, odor substances, and fine impurities in water, and a reverse osmosis filter layer for reducing the content of dissolved impurities, bacteria, and fine pollutants in water.

[0025] In one embodiment, the at least one filter layer further includes a primary filter layer for removing fine suspended particles from the water and a secondary filter layer for intercepting carbon powder particles generated during activated carbon filtration. The primary filter layer, the activated carbon filter layer, the secondary filter layer, and the reverse osmosis filter layer are connected in sequence, and the filtration accuracy of the secondary filter layer is greater than that of the primary filter layer.

[0026] In one embodiment, the water recycling component further includes a first buffer container disposed between the first filtration component and the water treatment component. In the water filtration mode, the first filtration component is in at least one-way communication with the first buffer container, and the first buffer container is connected to the water treatment component. Water filtered by the first filtration component is buffered in the first buffer container.

[0027] In one embodiment, the abrasive recovery assembly includes an abrasive screening unit for removing impurities from the abrasive and an abrasive recovery container for storing the abrasive, wherein the first filtration assembly is connected to the abrasive screening unit, and the abrasive screening unit is in communication with the abrasive recovery container.

[0028] In one embodiment, the abrasive screening unit is a magnetic impurity separation unit capable of removing magnetic impurities.

[0029] In one embodiment, the system further includes a circulating liquid cooling unit, which includes a cold source liquid tank and a cooling circulation pipeline. The inlet and outlet of the cooling circulation pipeline are both connected to the cold source liquid tank for water cooling. The cooling circulation pipeline is used to dissipate heat from the abrasive screening unit.

[0030] In one embodiment, the water recovery assembly has a water receiving container for storing water, the cold source liquid tank is the water receiving container, or the cold source liquid tank is connected to the water receiving container.

[0031] In one embodiment, the abrasive recovery container serves as an abrasive water tank during vehicle washing, or the abrasive recovery container is connected to the abrasive water tank during vehicle washing.

[0032] In one embodiment, the abrasive recovery assembly further includes a second buffer container disposed between the first filter assembly and the abrasive screening unit. In the abrasive recovery mode, the first filter assembly is in at least one-way communication with the second buffer container so that the abrasive can be buffered in the second buffer container.

[0033] In one embodiment, the second buffer container is provided with a first liquid level detection unit for detecting the abrasive liquid level, and the first liquid level detection unit is electrically connected to the control unit; when the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to feed into the abrasive screening unit; when the abrasive liquid level is lower than or equal to the second abrasive liquid level, the control unit controls the abrasive in the second buffer container to stop feeding into the abrasive screening unit; the first abrasive liquid level is higher than the second abrasive liquid level.

[0034] In one embodiment, when the recycling system is in the filtration mode and the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to be fed into the abrasive recycling component.

[0035] In one embodiment, the first abrasive liquid level is 50%-70% of the cavity height of the second buffer container, and the second abrasive liquid level is 10%-30% of the cavity height of the second buffer container.

[0036] In one embodiment, a wastewater level detection unit is further included. The wastewater level detection unit is used to detect the wastewater level of the mixed wastewater in the water collection chamber. The control unit is electrically connected to the wastewater level detection unit. When the wastewater level is higher than or equal to a first wastewater level, the control unit controls the recycling system to execute the water filtration mode. When the wastewater level is lower than or equal to a second wastewater level, the control unit controls the recycling system to execute the abrasive recycling mode. The first wastewater level is higher than the second wastewater level.

[0037] In one embodiment, the first sewage level is 70%-90% of the height of the water collection chamber, and the second sewage level is 5%-20% of the height of the water collection chamber.

[0038] In one embodiment, the system further includes a mode selection module that provides the water filtration mode and the abrasive recovery mode for the operator to select in order to execute the corresponding mode.

[0039] To achieve one of the above objectives, one embodiment of this application provides a recycling method for a car wash in an indoor parking lot, comprising:

[0040] The mixed wastewater generated from washing vehicles is collected, and the mixed wastewater includes abrasive and water;

[0041] The mixed wastewater is guided to the first filtration assembly, the water in the mixed wastewater passes through the first filtration assembly and flows into the water recovery assembly, and the abrasive particles in the mixed wastewater accumulate in the first filtration assembly;

[0042] Stop the water recovery component from recovering water, rinse the first filter component, and flush the abrasive material accumulated in the first filter component into the abrasive recovery component to recover the abrasive material.

[0043] According to the recycling method described in the above embodiments, the water from the mixed wastewater is first passed through the first filter assembly and flows into the water recycling assembly to complete the water recycling. Simultaneously, during water recycling, the abrasive particles from the mixed wastewater can be concentrated in the first filter assembly, increasing the amount of abrasive particles in the first filter assembly. Afterwards, the first filter assembly is rinsed, and the abrasive particles concentrated in the first filter assembly are flushed into the abrasive recycling assembly for recycling. This method can simultaneously achieve the recycling of both water and abrasive particles. Moreover, by first enriching the abrasive particles in the mixed wastewater at the filter structure, and then rinsing and recycling the abrasive particles, the rinsing efficiency of the rinsing assembly for the abrasive particles can be improved, saving rinsing time.

[0044] To achieve one of the above objectives, one embodiment of this application provides a recycling system for a car wash in an indoor parking lot, comprising:

[0045] A water collection tank having a water collection chamber for collecting mixed wastewater generated during vehicle washing, the mixed wastewater comprising abrasive and water;

[0046] A first filter assembly having a filter structure for separating water and abrasive in the mixed sludge, and the water collection tank being connected to the first filter assembly;

[0047] An abrasive recovery assembly, which is connected to the first filter assembly, is used to recover the abrasive filtered out by the filter structure.

[0048] A flushing assembly, connected to the first filter assembly, is used to flush the abrasive material gathered in the filter structure into the abrasive recovery assembly;

[0049] and control unit;

[0050] The recycling system has a water filtration mode and an abrasive recycling mode;

[0051] In the water filtration mode, the water collection tank is connected to the first filter component in at least one direction, the flushing component is disconnected from the first filter component in at least one direction, the first filter component is disconnected from the abrasive recovery component in at least one direction, and the first filter component can be connected to the water receiving space for receiving filtered water. The water mixed with sewage flows from the water collection tank into the filter structure and then into the water receiving space. The abrasive in the mixed sewage is collected at the filter structure.

[0052] In the abrasive recovery mode, the first filter component is connected to the abrasive recovery component in at least one direction, and the first filter component is disconnected from the water receiving space. The flushing component is connected to the first filter component in at least one direction. The flushing component flushes the abrasive that has accumulated at the filter structure into the abrasive recovery component to achieve the recovery of the abrasive.

[0053] The recycling system described in the above embodiment has a water filtration mode and an abrasive recycling mode. In the water filtration mode, water and abrasive in the mixed wastewater are separated by a filtration structure, allowing the abrasive in the mixed wastewater to be collected at the filtration structure. In the abrasive recycling mode, a flushing component flushes the abrasive collected at the filtration structure into the abrasive recycling component, thus recovering the abrasive. This method of first enriching and then flushing improves the flushing efficiency of the flushing component and saves flushing time.

[0054] In one embodiment, the flushing assembly includes a flushing pump, the upstream end of which is connected to a flushing water source, and the downstream end of which is connected to the first filter assembly; in the water filtration mode, the flushing pump is disconnected from the first filter assembly in at least one direction; in the abrasive recovery mode, the flushing pump is connected to the first filter assembly in at least one direction.

[0055] In one embodiment, a second filter assembly is further included, which is connected between the water collection tank and the first filter assembly. In the water filtration mode, the water collection tank, the second filter assembly, and the first filter assembly are at least in one-way communication, so that the mixed waste liquid can flow from the water collection tank through the second filter assembly to the first filter assembly. The filter pore size of the second filter assembly is larger than that of the first filter assembly and allows abrasive and water in the mixed waste liquid to pass through, so as to perform coarse filtration of the mixed waste liquid.

[0056] In one embodiment, the rinsing assembly is connected to the second filter assembly; in the abrasive recovery mode, the rinsing assembly, the second filter assembly, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive residue in the second filter assembly to the first filter assembly.

[0057] In one embodiment, the system further includes a sedimentation separation unit for separating substances in the mixed sludge that have a significantly different density from water and abrasive particles. The sedimentation separation unit is connected between the water collection tank and the first filter assembly. In the water filtration mode, the water collection tank, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the mixed sludge can flow from the water collection tank through the sedimentation separation unit to the first filter assembly. In the abrasive recovery mode, the rinsing assembly, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive particles remaining in the sedimentation separation unit to the first filter assembly.

[0058] In one embodiment, the rinsing assembly further includes a water collection tank rinsing pipeline. In the abrasive recovery mode, the water collection tank rinsing pipeline, the water collection tank, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the residual abrasive in the water collection tank to the first filter assembly.

[0059] In one embodiment, the abrasive recovery assembly includes an abrasive screening unit for removing impurities from the abrasive and an abrasive recovery container for storing the abrasive, wherein the first filtration assembly is connected to the abrasive screening unit, and the abrasive screening unit is in communication with the abrasive recovery container.

[0060] In one embodiment, the abrasive screening unit is a magnetic impurity separation unit capable of removing magnetic impurities.

[0061] In one embodiment, the system further includes a circulating liquid cooling unit, which includes a cold source liquid tank and a cooling circulation pipeline. The inlet and outlet of the cooling circulation pipeline are both connected to the cold source liquid tank for water cooling. The cooling circulation pipeline is used to dissipate heat from the abrasive screening unit.

[0062] In one embodiment, the cold source liquid tank is the water receiving space, or the cold source liquid tank is connected to the water receiving space.

[0063] In one embodiment, the abrasive recovery assembly further includes a second buffer container disposed between the first filter assembly and the abrasive screening unit. In the abrasive recovery mode, the first filter assembly is in at least one-way communication with the second buffer container so that the abrasive can be buffered in the second buffer container.

[0064] In one embodiment, the second buffer container is provided with a first liquid level detection unit for detecting the abrasive liquid level, and the first liquid level detection unit is electrically connected to the control unit; when the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to feed into the abrasive screening unit; when the abrasive liquid level is lower than or equal to the second abrasive liquid level, the control unit controls the abrasive in the second buffer container to stop feeding into the abrasive screening unit; the first abrasive liquid level is higher than the second abrasive liquid level.

[0065] In one embodiment, when the recycling system is in the filtration mode and the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to be fed into the abrasive recycling component.

[0066] In one embodiment, a wastewater level detection unit is further included. The wastewater level detection unit is used to detect the wastewater level of the mixed wastewater in the water collection chamber. The control unit is electrically connected to the wastewater level detection unit. When the wastewater level is higher than or equal to a first wastewater level, the control unit controls the recycling system to execute the water filtration mode. When the wastewater level is lower than or equal to a second wastewater level, the control unit controls the recycling system to execute the abrasive recycling mode. The first wastewater level is higher than the second wastewater level. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the recycling system in some embodiments of this application;

[0068] Figure 2 This is a schematic diagram of various filter layers of the water treatment component in some embodiments of this application;

[0069] Figure 3 This is a schematic diagram of the circulating liquid cooling unit cooling the abrasive screening unit in some embodiments of this application. Detailed Implementation

[0070] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0071] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0072] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0073] Traditional large-space car washes, such as those located in outdoor parking lots or converted from storefronts, are generally spacious and unrestricted by space. Therefore, they often feature a large wastewater container to hold the wastewater generated during washing, and then slowly purify and recycle it during or after the wash (the large size of the container does not interfere with the normal operation of the wash). However, for the car washes used in indoor parking lots as described in this application, these can only be built within existing indoor parking lots (such as, but not limited to, underground parking lots in residential areas, office buildings, and shopping malls, or parking garages). The height and width of these indoor parking lots are designed for parking, and the original design did not consider the need for car washing. Therefore, the space available for setting up a car wash is often limited, especially when using robotic arms to automatically wash cars. The height of the parking lot, after accommodating the vehicle being washed and the corresponding robotic arm, leaves almost no space for a large wastewater container. This makes it difficult to directly adopt the wastewater recycling methods of traditional car washes for these types of car washes used in indoor parking lots. Furthermore, some car washes used in indoor parking lots employ a contactless washing method (i.e., the robotic arm does not contact the vehicle being washed throughout the process). In this case, abrasive particles are added to the wash water to enhance the removal of stains. Currently, there is no good solution for recycling these abrasive particles and the wastewater, requiring additional conceptualization and design.

[0074] To address the above problems, some embodiments of this application provide a recycling system for a car wash in an indoor parking lot. This recycling system employs two modes: a filtration mode and an abrasive recovery mode. The filtration mode separates abrasive particles from wastewater and recycles the wastewater, while concentrating the abrasive particles in a designated location. The abrasive recovery mode is used to recover the abrasive particles.

[0075] Please refer to Figure 1 In some embodiments, the recycling system includes a water collection tank 100, a first filter assembly 200, a water recovery assembly 300, an abrasive recovery assembly 400, a rinsing assembly 500, and a control unit 600. The control unit 600 can control the various electronically controlled components. Furthermore, the recycling system may also have other components as needed, such as the second filter assembly 700 and the sedimentation separation unit 800 mentioned later; these are additional features and can be selected as appropriate.

[0076] The water collection trough 100 can have any structure capable of forming a water collection cavity, such as a square or other shaped trough structure. The shape of the water collection cavity is not limited, and it is used to collect the mixed wastewater generated from washing the vehicle. This mixed wastewater includes abrasive particles and water. Of course, the mixed wastewater may also contain other impurities, such as leaves, mud, plastic fragments, or metal fragments. In some embodiments, the water collection trough 100 can be located below the vehicle being washed; for example, a grid or other support structure with gaps can be arranged above the water collection trough 100 to support the vehicle being washed and allow wastewater generated from washing the vehicle to flow in. In other embodiments, the water collection trough 100 may not be located below the vehicle being washed, but in other locations, such as to the side of the vehicle being washed. In this case, the mixed wastewater generated from washing the vehicle can flow into the water collection cavity of the water collection trough 100 through a passage (such as a pipe or trough).

[0077] The first filter assembly 200 can employ any structure capable of separating water and abrasive particles in the mixed wastewater, allowing the filtered water and filtered abrasive particles to flow to different locations. In some embodiments, the first filter assembly 200 has an upstream end, a downstream end, and a filter structure 210 disposed between the upstream and downstream ends. As an example, the filter structure 210 of the first filter assembly 200 can be, but is not limited to, a filter screen, filter cloth, filter membrane, or other filter structure. Normally, the mixed wastewater flows into the first filter assembly 200 from its upstream end, the filtered water flows out from its downstream end, and the abrasive particles are collected on the filter structure 210. The water collection tank 100 is connected to the first filter assembly 200. This connection includes both a direct connection between the water collection tank 100 and the first filter assembly 200 via a passage, and a connection between the water collection tank 100 and the first filter assembly 200 with other components, such as the second filter assembly 700 and the sedimentation separation unit 800, which will be mentioned later. A valve may also be provided between the water collection tank 100 and the first filter assembly 200 to control the on / off state or unidirectional flow. In some embodiments, a drive pump may also be provided between the water collection tank 100 and the first filter assembly 200, which is used to pump the mixed sewage in the water collection tank 100 into the first filter assembly 200.

[0078] The water recovery assembly 300 is connected to the first filter assembly 200, for example, to the downstream end of the first filter assembly 200, for collecting water filtered by the first filter assembly 200. The water recovery assembly 300 may only be used for water recovery and storage. However, in some embodiments, the water recovery assembly 300 may also have a water treatment structure to further filter the recovered water. A valve may be provided between the water recovery assembly 300 and the first filter assembly 200 to control on / off or unidirectional flow.

[0079] The abrasive recovery assembly 400 is connected to the first filter assembly 200, for example, to its upstream end, to recover the abrasive filtered out by the filter structure 210. The flushing assembly 500 is connected to the first filter assembly 200 to flush the abrasive accumulated in the filter structure 210 into the abrasive recovery assembly 400 when needed. Valves can be installed between the abrasive recovery assembly 400 and the first filter assembly 200, and between the flushing assembly 500 and the first filter assembly 200, to control on / off or unidirectional flow.

[0080] As mentioned earlier, the recycling system has a water filtration mode and an abrasive recovery mode. Under the control of the control unit 600, the recycling system can switch between the water filtration mode and the abrasive recovery mode.

[0081] For details, please refer to Figure 1 In the water filtration mode, the water collection tank 100 is connected to the first filter component 200 in at least one direction to prevent the mixed wastewater from flowing back to the side where the water collection tank 100 is located. The flushing component 500 is disconnected from the first filter component 200 in at least one direction to prevent the water from the flushing component 500 from affecting the water recovery in the mixed wastewater. The first filter component 200 is disconnected from the abrasive recovery component 400 in at least one direction, and is connected to the water recovery component 300 in at least one direction. The water of the mixed wastewater flows from the water collection tank 100 into the filter structure 210, is filtered by the filter structure 210, and then flows into the water recovery component 300 to achieve water recovery. At the same time, since the first filter component 200 is disconnected from the abrasive recovery component 400 in at least one direction, the abrasive in the mixed wastewater is collected at the filter structure 210. As the filtration process continues, the abrasive gradually forms a high-concentration slurry zone on the upstream side of the filter structure, thereby achieving abrasive enrichment.

[0082] Please continue to refer to this. Figure 1 In the abrasive recovery mode, the first filter component 200 is connected to the abrasive recovery component 400 in at least one direction, and is also disconnected from the water recovery component 300 in at least one direction, to prevent water flowing out of the flushing component 500 from flowing back into the water recovery component 300 and causing flushing failure. The flushing component 500 is connected to the first filter component 200 in at least one direction. Through flushing by the flushing component 500, the abrasive material accumulated at the filter structure 210 can be flushed into the abrasive recovery component 400 to achieve abrasive recovery.

[0083] The flushing component 500 can flush the first filter component 200 from its downstream end, allowing the abrasive to flow from its upstream end into the abrasive recovery component 400. Alternatively, since the first filter component 200 is at least unidirectionally disconnected from the water recovery component 300 at this time, the flushing component 500 can also flush from its upstream end, allowing the abrasive to flow from its upstream end into the abrasive recovery component 400.

[0084] It should be noted that, in this application, "one-way connection between A and B" means that there is at least a one-way connection between A and B, which also includes the case of a two-way connection between A and B. Similarly, in this application, "one-way disconnection between A and B" means that there is at least a one-way disconnection between A and B, which also includes the case of a two-way disconnection between A and B.

[0085] The recycling system shown in the above embodiment can not only recover water from the mixed wastewater but also recover abrasive particles. In particular, in filtration mode, while recovering water, the abrasive particles from the mixed wastewater are also concentrated at the filter structure 210. When switching to abrasive recovery mode, a large amount of abrasive particles can be flushed into the abrasive recovery component 400 in a short time, improving the flushing efficiency of the flushing component 500 and saving flushing time. This dual-mode design can quickly extract and filter out the mixed wastewater generated from car washing through filtration mode, preventing the mixed wastewater from accumulating in the collection tank 100, achieving simultaneous wastewater recovery and water use, thus achieving the goal of recycling while washing cars. The recovered water can be stored separately or reused as flushing water for vehicles. Therefore, this recycling system can be applied to car washes in indoor parking lots, eliminating the need for large wastewater tanks to store wastewater or to shut down operations specifically for wastewater recovery.

[0086] Because of the abrasive recovery method of first enriching and then rinsing, the abrasive can be collected in the first filter element 200 during the filtration mode. Therefore, the abrasive recovery mode only needs a short time to flush the abrasive into the abrasive recovery element 400. Thus, in some embodiments, the duration of the filtration mode can be longer than the duration of the abrasive recovery mode. In this way, the recovery system can be in filtration mode for most of the time during the car wash process, further improving the filtration efficiency of the mixed sewage in the collection tank 100. This prevents excessive accumulation of mixed sewage in the collection tank 100, thus requiring a smaller water collection chamber volume in the collection tank 100, which is more conducive to space saving and allows car washes using this recovery system to be suitable for smaller spaces.

[0087] Of course, in other embodiments, the duration of the filtering mode and the duration of the abrasive recovery mode may not be limited, but can be flexibly set according to actual needs.

[0088] The function of the flushing assembly 500 is to introduce qualified water (such as clean water) into the first filter assembly 200, and to flush the abrasive material enriched in the first filter assembly 200 (such as on the filter structure 210) into the abrasive recovery assembly 400 through the flow of water. Therefore, the flushing assembly 500 can adopt any structure that can achieve this function.

[0089] In one exemplary embodiment, please refer to Figure 1 The rinsing assembly 500 includes a rinsing pump 510. The upstream end of the rinsing pump 510 is connected to a rinsing water source, and the downstream end is connected to a first filter assembly 200. The rinsing water source can be any water source, as long as its quality meets the requirements for abrasive recovery. For example, it can be water used to wash cars, or purified water obtained from wastewater treatment. In water filtration mode, the rinsing pump 510 is at least unidirectionally disconnected from the first filter assembly 200 to prevent it from pumping water into the first filter assembly 200 and affecting the recovery of water from the mixed wastewater. Of course, it is preferable that the rinsing pump 510 is bidirectionally disconnected from the first filter assembly 200 to prevent wastewater from the mixed wastewater from entering the rinsing pump 510 and related pipelines. In abrasive recovery mode, the rinsing pump 510 is at least unidirectionally connected to the first filter assembly 200 so that it can pump rinsing water into the first filter assembly 200. The pumps used in each embodiment of this application can be selected as needed, and this application does not limit the type of pump.

[0090] The flushing water source for the flushing pump 510 can come from a separate container or from water recovered in this recycling system. For example, in one embodiment, the water recycling assembly 300 has a water receiving container 320 for storing the recovered water, and the flushing water source for the flushing pump 510 is the water receiving container 320 or is connected to the water receiving container 320.

[0091] Furthermore, the recycled water can be stored in the water receiving container 320 for later use, or it can continue to be used as a water source for washing vehicles. For example, in one embodiment, a water supply source for washing vehicles is also included, which is the water receiving container 320 of the water recycling assembly 300, or the water receiving container 320 is connected to the water supply source.

[0092] During the water recycling process, the water receiving container 320 of the water recycling assembly 300 can be any container capable of receiving and storing recycled water, such as a water tank, bucket, or other type of container. Water filtered from the first filtration assembly 200 can flow directly into the water receiving container 320 for storage. Of course, if higher water quality is required for the recycled water, the water recycling assembly 300 can further treat the recycled water (such as re-filtration or purification). In one embodiment, please refer to... Figure 1The water recovery assembly 300 includes a water treatment assembly 310 and a water receiving container 320. The water treatment assembly 310 is used to further treat the recovered water to purify it. The water treatment assembly 310 has at least one filter layer for filtering the recovered water. The water treatment assembly 310 is in at least one-way communication with the water receiving container 320 so that the water receiving container 320 can recover the water filtered by the water treatment assembly 310.

[0093] The structure and number of filter layers can adopt existing water purification structures. Alternatively, in one embodiment of this application, please refer to... Figure 2 The at least one filtration layer includes an activated carbon filter layer 312 for adsorbing organic pollutants, odors, and fine impurities in the water, and a reverse osmosis filter layer 314 for reducing the content of dissolved impurities, bacteria, and fine pollutants in the water. The reverse osmosis filter layer 314 employs, but is not limited to, an RO reverse osmosis membrane module. In the flow direction of the recycled water, the activated carbon filter layer 312 is located before the reverse osmosis filter layer 314. The water first flows through the activated carbon filter layer 312 to improve water quality, and then flows through the reverse osmosis filter layer 314 for deep purification treatment to reduce the content of dissolved impurities, bacteria, and fine pollutants in the water, thereby bringing the treated water to a state close to that of a clean water source.

[0094] To further improve the purification effect, one embodiment of this application further improves the filter layer; please refer to [reference needed]. Figure 2 The at least one filter layer further includes a primary filter layer 311 for removing fine suspended particles from the water and a secondary filter layer 313 for intercepting carbon powder particles generated during activated carbon filtration. In the direction of water flow, the primary filter layer 311, activated carbon filter layer 312, secondary filter layer 313, and reverse osmosis filter layer 314 are sequentially connected. The secondary filter layer 313 has a higher filtration accuracy than the primary filter layer 311. For example, in some embodiments, the primary filter layer 311 uses, but is not limited to, a PP cotton filter element with a filtration accuracy of 5 μm to further remove fine suspended particles from the water, thereby reducing the fouling load on the activated carbon filter layer. The secondary filter layer 313 can also use, but is not limited to, a PP cotton filter element with a filtration accuracy of 1 μm, and is positioned between the activated carbon filter layer 312 and the reverse osmosis filter layer 314 to intercept carbon powder particles that may be generated during activated carbon filtration, thereby reducing the risk of reverse osmosis membrane fouling and improving the membrane module's lifespan. In this embodiment, the arrangement of the primary filter layer 311, activated carbon filter layer 312, secondary filter layer 313 and reverse osmosis filter layer 314, as well as the selection of materials for each filter layer, together form a good re-purification structure. Compared with other arrangements and structural designs, it can better improve the water quality of the recycled water, and it is simpler and easier to implement in terms of structure.

[0095] Of course, the primary filtration layer 311, activated carbon filtration layer 312, secondary filtration layer 313, and reverse osmosis filtration layer 314 can also be arranged in other orders, such as the order of primary filtration layer 311, secondary filtration layer 313, activated carbon filtration layer 312, and reverse osmosis filtration layer 314, or the order of activated carbon filtration layer 312, primary filtration layer 311, secondary filtration layer 313, and reverse osmosis filtration layer 314. However, generally speaking, the arrangement of the primary filtration layer 311, activated carbon filtration layer 312, secondary filtration layer 313, and reverse osmosis filtration layer 314 ultimately results in a better water purification effect.

[0096] Furthermore, when the water recovery assembly 300 does not include the water treatment assembly 310, the water filtered by the first filtration assembly 200 can directly enter the water receiving container 320. Therefore, the filtration speed of the first filtration assembly 200 is basically unaffected by the water receiving rate of the water receiving container 320. However, when the water recovery assembly 300 includes the water treatment assembly 310, since the filter layer requires a certain amount of time to purify the water, the filtration speed of the first filtration assembly 200 cannot be too fast, or it needs to stop filtration to wait for the filter layer to complete the purification. This results in an excessively long water filtration time and a slower suction of the mixed sludge in the collection tank 100. To solve this problem, please refer to [reference needed]. Figure 1 In one embodiment, the water recovery assembly 300 further includes a first buffer container 330. The first buffer container 330 is disposed between the first filtration assembly 200 and the water treatment assembly 310. In water filtration mode, the first filtration assembly 200 is in at least one-way communication with the first buffer container 330, and water filtered from the first filtration assembly 200 is buffered in the first buffer container 330. The first buffer container 330 is connected to the water treatment assembly 310 so that water buffered in the first buffer container 330 can enter the water treatment assembly 310.

[0097] Due to the presence of the first buffer container 330, the filtration speed of the first filter assembly 200 is unaffected by the processing speed of the water treatment assembly 310. The filtered water can be buffered in the first buffer container 330 to quickly drain and filter the mixed wastewater in the collection tank 100. Moreover, the first buffer container 330 and the water treatment assembly 310 are continuously connected. Even when switching to the abrasive recovery mode, the water in the first buffer container 330 can continuously enter the water treatment assembly 310, thereby improving the water treatment capacity without affecting the overall recovery of the mixed wastewater in the collection tank 100.

[0098] Regarding abrasive recovery, the abrasive filtered by the first filter assembly 200 can be directly recovered into the abrasive recovery container 420 of the abrasive recovery assembly 400, meaning that the abrasive recovery assembly 400 does not include the abrasive screening unit 410 at this time. Of course, in some embodiments, please refer to... Figure 1 When the quality requirements for abrasive recycling are too high, the abrasive recycling assembly 400 may include an abrasive screening unit 410 for removing impurities from the abrasive and an abrasive recycling container 420 for storing the abrasive. A first filter assembly 200 is connected to the abrasive screening unit 410, and the abrasive screening unit 410 is connected to the abrasive recycling container 420. The abrasive filtered from the first filter assembly 200 can be fed into the abrasive screening unit 410 for screening. The abrasive after impurities are removed enters the abrasive recycling container 420 from the abrasive screening unit 410 for storage or reuse. The connection between the first filter assembly 200 and the abrasive screening unit 410 includes both direct connection and connection via an intermediate component. This intermediate component may be a buffer or other functional component, such as the second buffer container 430 mentioned later.

[0099] In one embodiment, the abrasive recovery container 420 serves as an abrasive water tank for vehicle washing, or the abrasive recovery container 420 is connected to the abrasive water tank for vehicle washing. That is, when it is necessary to mix abrasives to clean the vehicle, the abrasives in the abrasive recovery container 420 can be used.

[0100] When the abrasive recovery assembly 400 includes an abrasive screening unit 410, the abrasive recovery method of first enriching and then rinsing, as shown in this application, is more conducive to improving the efficiency of the abrasive screening unit 410. Specifically, after the abrasive is enriched to a certain concentration at the first filter assembly 200, it is then transported to the abrasive screening unit 410 through the rinsing assembly 500. This method of enriching and then collecting yields a mixture of abrasive and water with a higher concentration, which improves the efficiency of the abrasive screening unit 410 while reducing the load requirements on the abrasive screening unit 410, thus reducing equipment costs. In addition, it can also avoid the abrasive screening unit 410 from running for a long time, reduce the amount of circulating processing, and improve the abrasive recovery rate.

[0101] Furthermore, the specific type of abrasive screening unit 410 can be selected according to the type of impurities to be removed. In some embodiments, considering that metal fragments are easily introduced during vehicle washing, such as metal fragments falling from vehicle wheel hubs or other locations, which may also be mixed into the mixed wastewater, the abrasive screening unit 410 can be specifically a magnetic impurity separation unit capable of removing magnetic impurities. This magnetic impurity separation unit can employ any equipment suitable for abrasives, such as, but not limited to, high-gradient magnetic separation, electromagnetic separation, permanent magnet separation, or other magnetic particle separation equipment.

[0102] The abrasive screening unit 410 generates significant heat during operation, thus requiring heat dissipation. For some embodiments, please refer to... Figure 3 In this embodiment, the recovery system further includes a circulating liquid cooling unit 440, which includes a cold source liquid tank 441 and a cooling circulation pipe 442. The inlet and outlet of the cooling circulation pipe 442 are both connected to the cold source liquid tank 441 in a water-cooled manner, and the cooling circulation pipe 442 is used to dissipate heat from the abrasive screening unit 410. In addition to the circulating liquid cooling unit 440, in other embodiments, the abrasive screening unit 410 can also be cooled by equipping it with an independent cooling tower, plate heat exchanger, air-cooled structure, or other external cooling circulation system.

[0103] However, the external cooling systems, such as the circulating liquid cooling unit 440, external cooling tower, plate heat exchanger, and air-cooled structure, occupy a large space, which is not conducive to application in small indoor parking lots. To address this issue, some embodiments of this application utilize the existing architecture of the recycling system to design a circulating cooling system for the abrasive screening unit 410.

[0104] Specifically, in one embodiment, please refer to Figure 3 When the water recovery assembly 300 has a water receiving container 320, the cold source liquid tank 441 of the circulating liquid cooling unit 440 can be set as the water receiving container 320. In this case, there is no need to set up a separate container as the cold source liquid tank 441, which saves space and makes the entire circulating liquid cooling unit 440 occupy less space. Of course, in some embodiments, the cold source liquid tank 441 can also be connected to the water receiving container 320, instead of directly using the water receiving container 320 as the cold source liquid tank 441.

[0105] Furthermore, when the water receiving container 320 also serves as a water source for washing vehicles, the system has a natural advantage in cooling and heat dissipation. For example, please refer to... Figure 1 and 3After the water receiving container 320 exchanges heat with the abrasive screening unit 410, the heated water returns to the water receiving container 320 and is continuously drawn out for car washing during subsequent processes. During the car washing process, this circulating water is sprayed onto the vehicle surface through a spray gun and continuously contacts and exchanges heat with the outside air in the open space, thereby cooling down to maintain a thermal equilibrium state close to the ambient temperature, forming a natural cooling and heat dissipation effect. The water receiving container 320 and the open environment of the car wash booth together form a generalized circulating heat dissipation system. Moreover, when the water heated by the abrasive screening unit 410 is used for car washing, its temperature is slightly higher than that of ordinary car wash water, which is more conducive to removing some stubborn stains on the vehicle through the increase in temperature, thus improving the cleaning effect. It can be seen that in this embodiment, using the water receiving container 320 simultaneously as the cold source liquid tank 441 of the circulating liquid cooling unit 440 and as the water source for washing vehicles can achieve multiple benefits. It can reduce the space occupied by the recycling system, improve the vehicle cleaning effect, and also cool the abrasive screening unit 410.

[0106] Furthermore, the abrasive screening unit 410 screens abrasives at a much lower speed than the abrasive recovery speed in the abrasive recovery mode. Therefore, the dual-mode approach adopted in this application is also beneficial to improving the efficiency of the entire recovery system. That is, when the abrasive screening unit 410 is working, the filtration mode can be executed to first enrich the abrasives at the first filtration component 200. After the abrasive screening unit 410 has finished screening the previous wave of abrasives, the abrasive recovery mode is then executed. This parallel operation can greatly improve the recovery efficiency of the entire recovery system for water and abrasives.

[0107] However, the screening speed of the abrasive screening unit 410 cannot perfectly match the filtration mode. Sometimes, when the filtration mode is completed, the screening unit has not yet finished screening, requiring the machine to stop and wait for the abrasive screening unit 410 to finish, which wastes a significant amount of time. To further improve recycling efficiency, please refer to some embodiments of this application. Figure 1 The abrasive recovery assembly 400 also includes a second buffer container 430. The second buffer container 430 is located between the first filter assembly 200 and the abrasive screening unit 410. In the abrasive recovery mode, the first filter assembly 200 is in at least one-way communication with the second buffer container 430, allowing the abrasive to be buffered in the second buffer container 430. This embodiment eliminates the problem that the abrasive screening unit 410 has not yet completed after the filter mode is finished. At this time, excess abrasive can be buffered in the second buffer container 430 through both the filter mode and the abrasive recovery mode, and the second buffer container 430 can then supply abrasive to the abrasive screening unit 410 after the latter has completed its task. Therefore, the filter mode and the abrasive recovery mode can be smoothly switched back and forth without downtime.

[0108] The feeding of the second buffer container 430 into the abrasive screening unit 410 can be performed manually or automatically. One embodiment provides an automatic feeding method. Specifically, the second buffer container 430 is equipped with a first liquid level detection unit (not shown in the figure) for detecting the abrasive liquid level, which is electrically connected to the control unit 600. When the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit 600 controls the abrasive in the second buffer container 430 to feed into the abrasive screening unit 410. When the abrasive liquid level is lower than or equal to the second abrasive liquid level, the control unit 600 controls the abrasive in the second buffer container 430 to stop feeding into the abrasive screening unit 410. The first abrasive liquid level is higher than the second abrasive liquid level. The detection of the first and second abrasive liquid levels can employ various existing detection units used for liquid level detection, such as, but not limited to, float detection units, gravity detection units, and pressure detection units.

[0109] As an example, the first abrasive liquid level is 50%-70% of the cavity height of the second buffer container 430, for example, 60%, and the second abrasive liquid level is 10%-30% of the cavity height of the second buffer container 430, for example, 20%. Of course, in other embodiments, the first and second abrasive liquid levels may also be set to other values ​​of the height of the water collection cavity according to control requirements.

[0110] Furthermore, since the abrasive is buffered using a second buffer container 430, it can still feed the abrasive to the abrasive screening unit 410 even after the abrasive recovery mode is switched to filtration mode, achieving parallel processing and improving recovery efficiency. Specifically, in one embodiment, when the recovery system is in filtration mode and the abrasive level is higher than or equal to the first abrasive level, the control unit 600 controls the abrasive in the second buffer container 430 to feed into the abrasive recovery assembly 400.

[0111] Of course, the second buffer container 430 can also feed the abrasive screening unit 410 completely independently, regardless of the abrasive recovery mode and the filtration mode.

[0112] More specifically, in some embodiments of this application, the abrasive screening unit 410 specifically employs a magnetic separator.

[0113] In some embodiments, the magnetic separator includes the following operating modes:

[0114] (1) Slurry feed magnetic separation mode

[0115] When the control unit 600 receives a slurry feeding command (e.g., when the abrasive liquid level is detected to be higher than or equal to the first abrasive liquid level), the slurry feeding pump starts and sends a slurry feeding and magnetic separation command to the magnetic separator. Upon receiving the slurry feeding and magnetic separation command, the magnetic separator enters the excitation state. The slurry, driven by the slurry feeding pump, enters the magnetic separator for magnetic separation to remove ferromagnetic particles. During the excitation process, the aforementioned circulating liquid cooling unit 440 is simultaneously activated to control the temperature of the magnetic separator coil.

[0116] (2) Recirculation mode

[0117] When the control unit 600 receives a stop slurry feeding command (e.g., when the abrasive liquid level is detected to be lower than or equal to the second abrasive liquid level), it sends a stop slurry feeding command to the magnetic separator, and the magnetic separator enters the slurry return mode. In the slurry return mode, the residual slurry inside the magnetic separator returns to the second buffer container 430 through the slurry return channel under the action of gravity, thereby reducing slurry residue and reducing material loss.

[0118] (3) Cleaning mode

[0119] After the slurry is returned to its original state, the magnetic separator is demagnetized and undergoes demagnetization. The system then enters a cleaning mode, using a combination of water pump flushing and gas purging to clean the internal magnetic mesh and flow channels, thereby removing ferromagnetic particles adsorbed on the mesh surface. This cleaning process reduces the impact of residual magnetic particles on subsequent magnetic separation efficiency and decreases the frequency of manual maintenance.

[0120] Of course, this is just one working mode of the magnetic separator; in other embodiments, the magnetic separator may also have different working modes.

[0121] Furthermore, as mentioned above, the water collection tank 100 can be directly connected to the first filter assembly 200, or other functional components can be added between the water collection tank 100 and the first filter assembly 200. Therefore, in some embodiments, please refer to... Figure 1 The system also includes a second filter assembly 700. The second filter assembly 700 is connected between the water collection tank 100 and the first filter assembly 200. In water filtration mode, the water collection tank 100, the second filter assembly 700, and the first filter assembly 200 are at least unidirectionally connected, allowing the mixed wastewater to flow from the water collection tank 100 through the second filter assembly 700 to the first filter assembly 200. In this embodiment, the mixed wastewater from the car wash first enters the second filter assembly 700 and then the first filter assembly 200. The second filter assembly 700 has a larger pore size than the first filter assembly 200, allowing abrasive particles and water from the mixed wastewater to pass through, thus performing coarse filtration to remove leaves, mud, plastic fragments, and other larger particulate impurities, reducing the risk of clogging and the operating load on subsequent treatment units.

[0122] In some embodiments, the number of sieve openings in the second filter component 700 can be set to less than or equal to 80 mesh, for example, 70 mesh. In contrast, the number of sieve openings in the first filter component 200 can be set to greater than or equal to 1400 mesh, for example, 1500 mesh. Of course, this value is only an example, and the number of sieve openings can be flexibly set according to the required filtration accuracy.

[0123] Aside from the difference in filtration precision, the second filter assembly 700 can also adopt the same structure as the first filter assembly 200, such as filter cloth, filter screen, filter membrane or other filterable structures.

[0124] To prevent abrasive residue from remaining between the second filter element 700 and the first filter element 200, in some embodiments, please refer to... Figure 1 The flushing assembly 500 is connected to the second filter assembly 700. In the abrasive recovery mode, the flushing assembly 500, the second filter assembly 700, and the first filter assembly 200 are at least unidirectionally connected, so that the flushing assembly 500 can flush the abrasive residue in the second filter assembly 700 to the first filter assembly 200, and then return it to the abrasive recovery assembly 400.

[0125] Additionally, please refer to Figure 1 In some embodiments, the recovery system further includes a sedimentation separation unit 800 for separating substances in the mixed sludge that have a significantly different density from water and abrasive. The sedimentation separation unit 800 is connected between the water collection tank 100 and the first filter assembly 200. In water filtration mode, the water collection tank 100, sedimentation separation unit 800, and first filter assembly 200 are at least unidirectionally connected, allowing the mixed sludge to flow from the water collection tank 100 through the sedimentation separation unit 800 to the first filter assembly 200. In abrasive recovery mode, the rinsing assembly 500, sedimentation separation unit 800, and first filter assembly 200 are at least unidirectionally connected, allowing the rinsing assembly 500 to rinse residual abrasive in the sedimentation separation unit 800 into the first filter assembly 200, where it flows into the abrasive recovery assembly 400.

[0126] Furthermore, in one embodiment, the sedimentation separation unit 800 may employ a vertical flow sedimentator. The advantage of using a vertical flow sedimentator is that after the mixed wastewater enters the sedimentator, gravity sedimentation separation is achieved using the density difference between the particles and water. Since the abrasives used in the car washing process mainly consist of high-density non-metallic particles such as quartz sand, preliminary separation of some abrasives and lightweight impurities can be achieved during the vertical flow sedimentation process.

[0127] The sedimentation separation unit 800 and the second filter assembly 700 can be used together, or one of them can be used separately. For example... Figure 1As shown, when the sedimentation separation unit 800 and the second filter assembly 700 are used together, the sedimentation separation unit 800 can be located between the second filter assembly 700 and the first filter assembly 200, or the second filter assembly 700 can be located between the sedimentation separation unit 800 and the first filter assembly 200. Through the coarse filtration of the second filter assembly 700 and the separation of the sedimentation separation unit 800, most impurities other than water and abrasive particles in the mixed wastewater can be further removed, thereby improving the subsequent recovery effect of water and abrasive particles.

[0128] Among them, the waste separated or screened by the second filter component 700, sedimentation separation unit 800, abrasive screening unit 410, etc. can be discharged into the waste link 900 through the passage (such as the pipe), and different types of waste can be discharged into the corresponding waste recycling space respectively.

[0129] In addition, to avoid abrasive residue, please refer to... Figure 1 In one embodiment, the rinsing assembly 500 further includes a water collection tank rinsing pipe 520. In the abrasive recovery mode, the water collection tank rinsing pipe 520, the water collection tank 100, and the first filter assembly 200 are at least unidirectionally connected, so that the rinsing assembly 500 can rinse the abrasive residue in the water collection tank 100 to the first filter assembly 200.

[0130] In addition, the switching between abrasive recovery mode and filtration mode can be done manually by the operator or automatically controlled by the control unit 600.

[0131] For example, in one embodiment, the recycling system further includes a wastewater level detection unit 101, which is used to detect the wastewater level of the mixed wastewater in the collection chamber. The control unit 600 is electrically connected to the wastewater level detection unit 101. When the wastewater level is higher than or equal to a first wastewater level, the control unit 600 controls the recycling system to execute a water filtration mode. When the wastewater level is lower than or equal to a second wastewater level, the control unit 600 controls the recycling system to execute an abrasive recovery mode. The first wastewater level is higher than the second wastewater level.

[0132] In one embodiment, the first sewage level is 70%-90% of the height of the water collection chamber, such as 80%; the second sewage level is 5%-20% of the height of the water collection chamber, such as 10%.

[0133] The wastewater level detection unit 101 can adopt various existing detection units used for liquid level detection, such as, but not limited to, float detection units, gravity detection units, pressure detection units, etc.

[0134] In other embodiments, the recycling system further includes a mode selection module (not shown in the figure) that provides the operator with a water filtration mode and an abrasive recycling mode to select from in order to execute the corresponding mode. This mode selection module can be a physical button, a touch button on a touchscreen, or a command receiving unit capable of receiving remote control commands from a host or other terminal. The operator can use this mode selection module to select which mode to execute.

[0135] The above embodiments illustrate various schemes that can recover both abrasive and water from mixed wastewater. In other embodiments of this application, it is also possible to recover only the abrasive without recovering the water. In this case, the water recovery component 300 can be omitted from the recovery system, and other components can adopt the aforementioned structure.

[0136] In this abrasive recovery scheme, in water filtration mode, the water collection tank 100 is connected to the first filter assembly 200, the flushing assembly 500 is disconnected from the first filter assembly 200 in at least one direction, and the first filter assembly 200 is disconnected from the abrasive recovery assembly 400 in at least one direction. The first filter assembly 200 is also connected to a water receiving space for receiving filtered water. The water containing the mixed waste liquid flows from the water collection tank 100 into the filter structure 210 and then into the water receiving space, where the abrasive particles are collected. In abrasive recovery mode, the first filter assembly 200 is connected to the abrasive recovery assembly 400 in at least one direction, and is disconnected from the water receiving space. The flushing assembly 500 is connected to the first filter assembly 200 in at least one direction. The flushing assembly 500 flushes the abrasive particles collected at the filter structure 210 into the abrasive recovery assembly 400, thus achieving abrasive recovery.

[0137] The water receiving space can be a sewer or drainage system to directly discharge the filtered water. Alternatively, it can be a wastewater container to centrally store the filtered water.

[0138] Furthermore, one embodiment of this application also provides a recycling method for a car wash in an indoor parking lot, comprising:

[0139] The mixed wastewater generated from washing vehicles is collected; the mixed wastewater includes abrasive and water.

[0140] The mixed waste liquid is guided to the first filter element 200, the water of the mixed waste liquid passes through the first filter element 200 and flows into the water recovery element 300, and the abrasive of the mixed waste liquid is collected in the first filter element 200.

[0141] Stop the water recovery component 300 from recovering water, rinse the first filter component 200, and flush the abrasive material accumulated in the first filter component 200 into the abrasive recovery component 400 to recover the abrasive material.

[0142] According to this recycling method, the mixed wastewater is first passed through the first filter assembly 200 and flows into the water recycling assembly 300 to complete the water recycling. Simultaneously, during water recycling, the abrasive particles from the mixed wastewater are also concentrated in the first filter assembly 200, increasing the amount of abrasive particles in the first filter assembly 200. Afterwards, the first filter assembly 200 is rinsed, and the abrasive particles concentrated in the first filter assembly 200 are flushed into the abrasive recycling assembly 400 for recycling. This method can simultaneously achieve the recycling of both water and abrasive particles. Moreover, by first enriching the abrasive particles in the mixed wastewater at the filter structure 210, and then rinsing and recycling the abrasive particles, the rinsing efficiency of the rinsing assembly 500 for the abrasive particles can be improved, saving rinsing time.

[0143] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A recycling system for a car wash in an indoor parking lot, characterized in that, include: A water collection tank having a water collection chamber for collecting mixed wastewater generated during vehicle washing, the mixed wastewater comprising abrasive and water; A first filter assembly having a filter structure for separating water and abrasive in the mixed sludge, and the water collection tank being connected to the first filter assembly; A water recovery assembly, which is connected to the first filtration assembly, is used to recover water filtered by the filtration structure. An abrasive recovery assembly, which is connected to the first filter assembly, is used to recover the abrasive filtered out by the filter structure. A flushing assembly, connected to the first filter assembly, is used to flush the abrasive material gathered in the filter structure into the abrasive recovery assembly; and control unit; The recycling system has a water filtration mode and an abrasive recycling mode; In the water filtration mode, the water collection tank is connected to the first filter component in at least one direction, the flushing component is disconnected from the first filter component in at least one direction, the first filter component is disconnected from the abrasive recovery component in at least one direction, and the first filter component is connected to the water recovery component in at least one direction. The water of the mixed sewage flows from the water collection tank into the filter structure and then into the water recovery component. The abrasive of the mixed sewage is collected at the filter structure. In the abrasive recovery mode, the first filter component is connected to the abrasive recovery component in at least one direction and is disconnected from the water recovery component in at least one direction. The flushing component is connected to the first filter component in at least one direction. The flushing component flushes the abrasive that has accumulated at the filter structure into the abrasive recovery component to achieve the recovery of the abrasive.

2. The recycling system as described in claim 1, characterized in that, The flushing assembly includes a flushing pump, the upstream end of which is connected to a flushing water source, and the downstream end of which is connected to the first filter assembly; in the water filtration mode, the flushing pump is disconnected from the first filter assembly in at least one direction; in the abrasive recovery mode, the flushing pump is connected to the first filter assembly in at least one direction.

3. The recycling system as described in claim 2, characterized in that, The water recycling assembly has a water receiving container for storing recycled water, and the flushing water source for the flushing pump is the water receiving container or is connected to the water receiving container.

4. The recycling system according to any one of claims 1-3, characterized in that, It also includes a water supply source for washing vehicles, the water recycling assembly having a water receiving container for storing recycled water, the water supply source being the water receiving container, or the water receiving container being connected to the water supply source.

5. The recycling system according to any one of claims 1-4, characterized in that, The water recycling assembly includes a water treatment component and a water receiving container. The water treatment component has at least one filter layer for filtering the recycled water. The water treatment component is in at least one-way communication with the water receiving container so that the water receiving container can recycle the water filtered by the water treatment component.

6. The recycling system as described in claim 5, characterized in that, The at least one filter layer includes an activated carbon filter layer for adsorbing organic pollutants, odors and fine impurities in the water and a reverse osmosis filter layer for reducing the content of dissolved impurities, bacteria and fine pollutants in the water.

7. The recycling system as described in claim 6, characterized in that, The at least one filter layer further includes a primary filter layer for removing fine suspended particles from the water and a secondary filter layer for intercepting carbon powder particles generated during activated carbon filtration. The primary filter layer, the activated carbon filter layer, the secondary filter layer, and the reverse osmosis filter layer are connected in sequence, and the filtration accuracy of the secondary filter layer is greater than that of the primary filter layer.

8. The recycling system according to any one of claims 1-7, characterized in that, The water recycling component further includes a first buffer container, which is disposed between the first filtration component and the water treatment component. In the water filtration mode, the first filtration component is connected to the first buffer container in at least one direction, and the first buffer container is connected to the water treatment component. Water filtered by the first filtration component is buffered in the first buffer container.

9. A recycling system for a car wash in an indoor parking lot, characterized in that, include: A water collection tank having a water collection chamber for collecting mixed wastewater generated during vehicle washing, the mixed wastewater comprising abrasive and water; A first filter assembly having a filter structure for separating water and abrasive in the mixed sludge, and the water collection tank being connected to the first filter assembly; An abrasive recovery assembly, which is connected to the first filter assembly, is used to recover the abrasive filtered out by the filter structure. A flushing assembly, connected to the first filter assembly, is used to flush the abrasive material gathered in the filter structure into the abrasive recovery assembly; and control unit; The recycling system has a water filtration mode and an abrasive recycling mode; In the water filtration mode, the water collection tank is connected to the first filter component in at least one direction, the flushing component is disconnected from the first filter component in at least one direction, the first filter component is disconnected from the abrasive recovery component in at least one direction, and the first filter component can be connected to the water receiving space for receiving filtered water. The water mixed with sewage flows from the water collection tank into the filter structure and then into the water receiving space. The abrasive in the mixed sewage is collected at the filter structure. In the abrasive recovery mode, the first filter component is connected to the abrasive recovery component in at least one direction, and the first filter component is disconnected from the water receiving space. The flushing component is connected to the first filter component in at least one direction. The flushing component flushes the abrasive that has accumulated at the filter structure into the abrasive recovery component to achieve the recovery of the abrasive.

10. The recycling system according to any one of claims 1-9, characterized in that, It also includes a second filter assembly connected between the water collection tank and the first filter assembly. In the water filtration mode, the water collection tank, the second filter assembly, and the first filter assembly are at least in one-way communication so that the mixed waste liquid can flow from the water collection tank through the second filter assembly to the first filter assembly. The filter aperture of the second filter assembly is larger than that of the first filter assembly and allows the abrasive and water in the mixed waste liquid to pass through, so as to perform coarse filtration of the mixed waste liquid.

11. The recycling system as described in claim 10, characterized in that, The rinsing assembly is connected to the second filter assembly; in the abrasive recovery mode, the rinsing assembly, the second filter assembly, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive residue in the second filter assembly to the first filter assembly.

12. The recycling system according to any one of claims 1-11, characterized in that, It also includes a sedimentation separation unit for separating substances in the mixed sludge that have a large density difference from water and abrasive, the sedimentation separation unit being connected between the water collection tank and the first filter assembly; in the water filtration mode, the water collection tank, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the mixed sludge can flow from the water collection tank through the sedimentation separation unit to the first filter assembly; in the abrasive recovery mode, the rinsing assembly, the sedimentation separation unit, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive remaining in the sedimentation separation unit to the first filter assembly.

13. The recycling system as described in claim 12, characterized in that, The sedimentation separation unit includes a vertical flow sedimentator.

14. The recycling system according to any one of claims 1-13, characterized in that, The rinsing assembly also includes a water collection tank rinsing pipeline. In the abrasive recovery mode, the water collection tank rinsing pipeline, the water collection tank, and the first filter assembly are at least unidirectionally connected, so that the rinsing assembly can rinse the abrasive residue in the water collection tank to the first filter assembly.

15. The recycling system according to any one of claims 1-14, characterized in that, The abrasive recovery assembly includes an abrasive screening unit for removing impurities from the abrasive and an abrasive recovery container for storing the abrasive. The first filtration assembly is connected to the abrasive screening unit, and the abrasive screening unit is connected to the abrasive recovery container.

16. The recycling system as described in claim 15, characterized in that, The abrasive screening unit is a magnetic impurity separation unit capable of removing magnetic impurities.

17. The recycling system as described in claim 15, characterized in that, It also includes a circulating liquid cooling unit, which includes a cold source liquid tank and a cooling circulation pipeline. The inlet and outlet of the cooling circulation pipeline are both connected to the cold source liquid tank for water cooling. The cooling circulation pipeline is used to dissipate heat from the abrasive screening unit.

18. The recycling system as described in claim 17, characterized in that, The water recovery assembly has a water receiving container for storing water, and the cold source liquid tank is the water receiving container, or the cold source liquid tank is connected to the water receiving container.

19. The recycling system according to any one of claims 1-18, characterized in that, The abrasive recovery assembly further includes a second buffer container, which is disposed between the first filter assembly and the abrasive screening unit. In the abrasive recovery mode, the first filter assembly is in at least one-way communication with the second buffer container so that the abrasive can be buffered in the second buffer container.

20. The recycling system as described in claim 19, characterized in that, The second buffer container is equipped with a first liquid level detection unit for detecting the abrasive liquid level, and the first liquid level detection unit is electrically connected to the control unit; when the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to feed into the abrasive screening unit; when the abrasive liquid level is lower than or equal to the second abrasive liquid level, the control unit controls the abrasive in the second buffer container to stop feeding into the abrasive screening unit; the first abrasive liquid level is higher than the second abrasive liquid level.

21. The recycling system as described in claim 20, characterized in that, When the recycling system is in the filtration mode and the abrasive liquid level is higher than or equal to the first abrasive liquid level, the control unit controls the abrasive in the second buffer container to be fed into the abrasive recycling component.

22. The recycling system according to any one of claims 1-21, characterized in that, It also includes a wastewater level detection unit, which is used to detect the wastewater level of the mixed wastewater in the water collection chamber. The control unit is electrically connected to the wastewater level detection unit. When the wastewater level is higher than or equal to a first wastewater level, the control unit controls the recycling system to execute the water filtration mode. When the wastewater level is lower than or equal to a second wastewater level, the control unit controls the recycling system to execute the abrasive recycling mode. The first wastewater level is higher than the second wastewater level.

23. A recycling method for car washes used in indoor parking lots, characterized in that, include: The mixed wastewater generated from washing vehicles is collected, and the mixed wastewater includes abrasive and water; The mixed wastewater is guided to the first filtration assembly, the water in the mixed wastewater passes through the first filtration assembly and flows into the water recovery assembly, and the abrasive particles in the mixed wastewater accumulate in the first filtration assembly; Stop the water recovery component from recovering water, rinse the first filter component, and flush the abrasive material accumulated in the first filter component into the abrasive recovery component to recover the abrasive material.

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