Household scrubber wastewater recycling device and method

Abstract

The invention discloses a household scrubber wastewater recycling device and method, and relates to the technical field of wastewater recycling. The device comprises a pretreatment strengthening module, a multi-stage filtering module, a biological purification module, an intelligent control module and a clear water storage module, and the method comprises six steps that primary solid-liquid separation is achieved through a centrifugal pre-separation unit, blockage of particles and metal impurities with the particle size being 50 micrometers or above to a subsequent filtering layer is reduced in cooperation with a magnetic adsorption assembly, and the filtering efficiency is improved. The replacement period of a pre-filtering layer is prolonged to 10 hours, a multi-stage filtering module adopts a three-stage system of a 50-mesh stainless steel filter screen, a 0.1 mu m ceramic membrane and an activated carbon fiber felt, and is combined with an intelligent washing unit, so that the reduction rate of the filtering efficiency caused by membrane pollution is controlled within 5%, the sand-water separation efficiency is greatly improved, and the manual maintenance frequency is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of artwork traceability, and specifically to a device and method for recycling wastewater from a household floor scrubber. Background Art

[0002] Existing floor scrubbers can be semi-automatic floor scrubbers, fully automatic floor scrubbers, push-type floor scrubbers, and ride-on floor scrubbers, which integrate water spraying, scrubbing, and sewage recovery into one.

[0003] The invention with publication number CN115671821A discloses a floor washing wastewater recycling treatment and utilization device, including a support frame, a water storage tank and a filter water tank are respectively provided on both sides of the support frame, the lower surfaces of the water storage tank and the filter water tank are fixedly installed with rollers, the upper surface of the water storage tank is provided with a water pump, the output port of the water pump is installed with a three-way valve, the upper surface of the support frame is fixedly connected to a handle rod, the inner walls of the support frame are respectively provided with two side baffles, a wiper blade and a drainage plate, the upper surface of the support frame is respectively installed with a power box and a connecting box, and the opposite surfaces of the power box and the connecting box are provided with card joints.

[0004] As shown in the above invention, the existing device is equipped with side baffles, wipers and drainage plates to make the lower part of the support frame fit with the ground, forming a barrier to prevent the waste water from washing the ground from flowing everywhere. When the nozzle or nozzle sprays water on the ground, the water in the barrier can be flushed into the filter water tank through the drainage plate, achieving the effect of flushing the ground and recycling the waste water at the same time. However, the existing device relies on a single filter screen and lacks pre-treatment steps such as centrifugal pre-separation and magnetic adsorption, resulting in a density of ≥1.2g / cm 3 Solid particles with a particle size greater than 50 μm directly enter the filter layer, causing the filter to become clogged, and ferromagnetic impurities cannot be effectively removed, affecting the subsequent precision filtration effect. In addition, sand particles carried by the wastewater are deposited in the filter water tank and easily clog the connecting duct. Existing devices lack dynamic monitoring of the degree of contamination of the filter membrane. The accumulation of pollutants on the surface of the ceramic membrane leads to a decrease in filtration accuracy, and the adjustment of aeration volume relies on manual experience, resulting in unstable biodegradation efficiency. At the same time, a water quality prediction model has not been established, making it impossible to adjust treatment parameters in advance, and equipment status monitoring and remote maintenance are lacking. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device and method for recycling wastewater from a household floor scrubber, which solves the existing problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A household floor scrubber wastewater recycling device, comprising:

[0007] The pretreatment enhancement module includes a centrifugal pre-separation unit and a magnetic adsorption component. The centrifugal pre-separation unit is used to use centrifugal force to separate the wastewater with a density of ≥1.2g / cm 3 The magnetic adsorption component is used to adsorb ferromagnetic impurities in wastewater;

[0008] The multi-stage filtration module is configured as a three-stage filtration system, including a pre-filtration layer, a precision filtration layer, and a deep adsorption layer. The pre-filtration layer uses a 50-mesh stainless steel filter to quickly intercept large particles of impurities. The precision filtration layer uses a porous ceramic membrane with a pore size of 0.1 μm and a titanium dioxide photocatalytic coating on the surface to decompose organic pollutants under ultraviolet light. The deep adsorption layer is filled with activated carbon fiber felt to absorb dissolved organic matter and odors.

[0009] The biological purification module is equipped with a dynamic cultivation system, built-in sensors to monitor COD and dissolved oxygen (DO) concentrations in real time, and automatically adjusts the aeration volume through a PID algorithm; a 3D-printed porous scaffold is used as a microbial carrier;

[0010] The intelligent control module includes an AI water quality prediction unit and an IoT interaction module. The AI ​​water quality prediction unit builds a water quality prediction model based on an LSTM neural network, inputs historical water quality data, and predicts water quality trends over the next hour. The IoT interaction module supports a mobile app to view wastewater treatment progress, water quality data, and equipment status in real time, and pushes firmware updates through a cloud server to automatically optimize control strategies.

[0011] The clean water storage module includes a deep purification unit and a water-saving water supply unit; the deep purification unit is equipped with an ultraviolet disinfection module and a mineral balance module. The ultraviolet disinfection module uses UV-CLED disinfection to kill bacteria; the mineral balance module adds soluble inorganic salt sustained-release tablets; the water pump of the water-saving water supply unit is equipped with a variable frequency motor, which dynamically adjusts the water supply according to the cleaning mode of the floor scrubber.

[0012] Preferably, the separation efficiency η of the centrifugal pre-separation unit can be calculated by the following formula:

[0013]

[0014] Among them, m1 is the mass of solid particles with a particle size greater than 50 μm in the wastewater before entering the centrifugal pre-separation unit, and m2 is the mass of solid particles with a particle size greater than 50 μm in the wastewater after passing through the centrifugal pre-separation unit.

[0015] Preferably, the adsorption rate α of the magnetic adsorption component can be calculated by the following formula:

[0016]

[0017] Among them, m 铁1 is the mass of ferromagnetic impurities in the wastewater before entering the magnetic adsorption component, m 铁2 It is the mass of ferromagnetic impurities in the wastewater after passing through the magnetic adsorption component.

[0018] Preferably, in the precision filtration layer, the degradation rate β of the photocatalytic coating on detergent residues can be calculated by the following formula:

[0019]

[0020] Among them, C1 is the concentration of detergent residue in the wastewater before entering the precision filtration layer, and C2 is the concentration of detergent residue in the wastewater after passing through the precision filtration layer.

[0021] Preferably, in the biological purification module, the formula for adjusting the aeration volume Q using the PID algorithm is:

[0022]

[0023] Among them, e(t) is the deviation between the set value and the real-time monitoring value of dissolved oxygen, K p is the proportionality coefficient, K i is the integral coefficient, K d is the differential coefficient.

[0024] Preferably, in the AI ​​water quality prediction system, the calculation formula of the output value yt of the LSTM neural network is:

[0025]

[0026] Among them, x t is the input vector, h t is the hidden state vector, c t is the cell state vector, i t is the input gate, f t is the forget gate, g t is the candidate cell state, o t is the output gate, σ is the Sigmoid function, tanh is the hyperbolic tangent function, ⊙ is the element-by-element multiplication, W is the weight matrix, and b is the bias direction.

[0027] Preferably, the multi-stage filtration module is provided with an intelligent flushing unit, which integrates a positioning tube, a rotating sleeve and a brush. The rotating sleeve is driven to rotate by a magnetic ring, and the brush cleans impurities on the surface of the ceramic membrane, thereby cleaning the pollutants on the surface of the ceramic membrane; the rotation speed of the brush is dynamically adjusted according to the degree of membrane contamination, and the degree of membrane contamination can be measured by the ratio of the membrane pressure difference ΔP to the initial membrane pressure difference ΔP0. When the brush speed increases to 100-150rpm; when The brush speed is maintained at 50-100rpm.

[0028] Preferably, in the water-saving water supply design of the clean water storage module, the relationship between the water supply volume V of the water pump and the cleaning mode of the floor scrubber can be determined by the following formula:

[0029] V = k × V0;

[0030] Among them, V0 is the water supply in the standard cleaning mode, k is the coefficient, k=1 in the standard mode, and k=1.5-2 in the strong mode.

[0031] Preferably, the device adopts a modular integrated design, and the multi-stage filtration module adopts a quick-release design to reduce the filter element replacement time; the biological purification module and the clean water storage module adopt an upper and lower stacking layout, utilizing the top space of the floor scrubber sewage tank.

[0032] The present invention also discloses a method for recycling wastewater from a household floor scrubber, comprising the following steps:

[0033] Step 1: The wastewater enters the pretreatment enhancement module, first passing through the centrifugal pre-separation unit for solid-liquid separation, and then passing through the magnetic adsorption component to adsorb ferromagnetic impurities;

[0034] Step 2: The pretreated wastewater enters the multi-stage filtration module and is filtered through the pre-filtration layer, precision filtration layer and deep adsorption layer in sequence;

[0035] Step 3: The filtered wastewater enters the biological purification module and undergoes biodegradation through a dynamic cultivation system;

[0036] Step 4: The purified water enters the clean water storage module, first passes through the deep purification unit for disinfection and mineral balance adjustment, and then is transported to the floor scrubber for recycling through the water-saving water supply design;

[0037] Step 5: The intelligent control module monitors the operating status of each module and water quality data in real time, automatically adjusts the processing parameters based on the results of the AI ​​water quality prediction system and the PID algorithm, and realizes remote monitoring and firmware OTA upgrades through the IoT interaction module.

[0038] Beneficial effects

[0039] The present invention provides a device and method for recycling wastewater from household floor scrubbers. Compared with the prior art, it has the following advantages:

[0040] 1. This household floor scrubber wastewater recycling device and method achieves preliminary solid-liquid separation through a centrifugal pre-separation unit. Combined with a magnetic adsorption component, it reduces the clogging of subsequent filter layers by particles larger than 50 μm and metal impurities, extending the pre-filter layer replacement cycle to 10 hours. The multi-stage filtration module adopts a three-stage system of "50-mesh stainless steel filter + 0.1 μm ceramic membrane + activated carbon fiber felt", combined with an intelligent flushing unit, to control the filtration efficiency drop rate caused by membrane contamination to within 5%, greatly improving the sand-water separation efficiency and significantly reducing the frequency of manual maintenance.

[0041] 2. This device and method for recycling wastewater from household floor scrubbers uses an intelligent control module that uses an LSTM neural network to predict water quality changes over the next hour. Combined with a PID algorithm, it automatically adjusts the aeration rate and water pump supply to improve biodegradation efficiency. The ultraviolet disinfection module and mineral balance system ensure that recycled water meets quality standards, making it suitable for recycling floor scrubbers. The IoT interaction module supports real-time monitoring and firmware OTA upgrades, shortening the response time for equipment failures from 30 minutes for manual troubleshooting to 5 minutes for automatic warnings. This improves the overall automation level of the processing process, effectively resolving the issues of "manual adjustment lag and unstable water quality" associated with traditional devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0043] Figure 2 This is a structural schematic diagram of the pretreatment enhancement module of the present invention.

[0044] Figure 3 It is a schematic structural diagram of the multi-stage filtration module of the present invention.

[0045] Figure 4 This is a connection diagram of the intelligent control module of the present invention.

[0046] Figure 5 Schematic diagram of the method of the present invention.

[0047] In the figure: pretreatment enhancement module 1, solid impurity collection device 11, centrifugal pre-separation unit 12, magnetic adsorption component 13, biological purification module 2, porous bracket 21, pre-filtration layer 31, precision filtration layer 32, deep adsorption layer 33, rotating sleeve 34, positioning tube 35, brush 36, clean water storage module 4, water quality monitoring sensor 41, intelligent control module 5. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] See for example Figure 1-5 , the present invention provides the following two technical solutions:

[0050] The first embodiment: a household floor scrubber wastewater recycling device, comprising:

[0051] The pretreatment enhancement module 1 includes a solid impurity collection device 11 , a centrifugal pre-separation unit 12 and a magnetic adsorption component 13 .

[0052] In actual application, the centrifugal pre-separation unit 12 is installed at the inlet of the solid impurity collection device 11. When the wastewater generated by the floor scrubber flows in, the wastewater enters the centrifugal separator at a certain flow rate. The motor of the centrifugal separator drives the internal rotating parts to rotate at a high speed of 3000-5000rpm. According to the centrifugal force formula F = mω 2 r (where F is the centrifugal force, m is the particle mass, ω is the angular velocity, and r is the radius of rotation), and the density in wastewater is ≥1.2 g / cm 3 Solid particles with a particle size greater than 50 μm are thrown to the outside of the separator under the action of strong centrifugal force and discharged into the solid impurity collection device 11 through a specific slag discharge port, achieving preliminary separation from the wastewater.

[0053] In order to ensure the efficient operation of the centrifugal pre-separation unit 12, it is necessary to clean the slag outlet regularly to prevent the accumulation of solid particles that affect the separation effect. At the same time, by real-time monitoring the pressure difference between the separator inlet and outlet and the content of solid particles in the wastewater after separation, according to the separation efficiency formula Evaluate its working status. When the separation efficiency is lower than 98%, check the separator's rotation speed, wear of internal components, etc., and make corresponding adjustments or maintenance.

[0054] The magnetic adsorption assembly 13 is located after the centrifugal pre-separation unit 12 and before the coarse filtration layer. The permanent magnet array is fixed to the inner wall of the pipe in a specific arrangement. When the wastewater flows through, ferromagnetic impurities (such as nails and metal powder) in the wastewater are attracted to the surface of the magnets under the action of the magnetic field.

[0055] In order to ensure the adsorption effect of the magnetic adsorption component 13, it is necessary to clean the adsorbed ferromagnetic impurities regularly. By setting an openable and closable device, the magnet part with adsorbed impurities can be taken out for cleaning. At the same time, the magnetic induction intensity of the magnet is regularly tested using a Gauss meter. When the magnetic induction intensity is lower than 0.5T, the magnet should be replaced in time. According to the adsorption rate formula To evaluate the adsorption effect, when the adsorption rate is lower than 95%, check whether the arrangement of the magnets and the magnetic field distribution have changed, and make adjustments.

[0056] The multi-stage filtration module is configured as a three-stage filtration system, including a pre-filtration layer 31 , a precision filtration layer 32 and a deep adsorption layer 33 .

[0057] Pre-filter layer 31: Pre-filter layer 31 uses a 50-mesh stainless steel filter and is installed at the front end of the filter module. When pretreated wastewater enters, the filter can quickly intercept large particles of impurities such as hair and paper scraps. Regularly check the filter for clogging. When the pressure difference before and after the filter reaches a certain value, it indicates that the filter is severely clogged and needs to be removed for cleaning or replacement. By comparing the mass of large particles in the wastewater before entering the pre-filter layer 31 and after passing through the pre-filter layer 31, its interception effect is evaluated according to the removal rate formula to ensure that the removal rate is ≥90%.

[0058] Precision filtration layer 32: The surface of the 0.1μm pore size porous ceramic membrane of the precision filtration layer 32 is loaded with a titanium dioxide photocatalytic coating. During the filtration process, wastewater passes through the micropores of the ceramic membrane, and fine suspended matter and some organic matter are intercepted. At the same time, under ultraviolet irradiation, the titanium dioxide photocatalytic coating produces free radicals with strong oxidizing properties, which decompose organic pollutants. In order to ensure the photocatalytic effect, it is necessary to ensure the normal operation of the ultraviolet lamp and regularly check the intensity and irradiation time of the ultraviolet lamp. According to the degradation rate formula of the photocatalytic coating on detergent residues To evaluate the degradation effect, when the degradation rate is lower than 60%, check whether the UV lamp needs to be replaced, whether there is dirt on the surface of the ceramic membrane that affects the photocatalytic reaction, etc., and take corresponding measures.

[0059] Deep Adsorption Layer 33: Deep adsorption layer 33 is filled with activated carbon fiber felt. As wastewater passes through, the high surface area of ​​the activated carbon fiber felt absorbs dissolved organic matter and odors. Regularly monitor the TOC content of the effluent. A TOC level exceeding 10 mg / L indicates a decrease in the adsorption capacity of the activated carbon fiber felt and requires replacement.

[0060] The multi-stage filtration module is provided with an intelligent flushing unit, which is integrated with a positioning tube 35, a rotating sleeve 34 and a brush 36. The rotating sleeve 34 is driven to rotate by a magnetic ring, and the brush 36 cleans impurities on the surface of the ceramic membrane to clean the pollutants on the surface of the ceramic membrane; the speed of the brush 36 is dynamically adjusted according to the degree of membrane contamination, which can be measured by the ratio of the membrane pressure difference ΔP to the initial membrane pressure difference ΔP0. When the brush 36 speed increases to 100-150rpm; when When the brush 36 rotates at 50-100 rpm, the speed of the brush 36 is maintained at 50-100 rpm. Regularly check the wear of the brush 36. When the wear of the brush 36 seriously affects the cleaning effect, replace the brush 36 in time.

[0061] An ultrasonic transducer can also be installed near the ceramic membrane to trigger 30 seconds of ultrasonic vibration during each cleaning cycle. This ultrasonic vibration creates a cavitation effect, breaking down the adhesion of contaminants on the membrane surface. Regularly check the working condition of the ultrasonic transducer to ensure it is properly generating 20kHz ultrasonic waves.

[0062] Alternatively, a micro-dosing pump can be built into the positioning tube 35 to periodically inject 0.1% citric acid solution. The intelligent control module 5 controls the operating frequency of the micro-dosing pump based on the degree of membrane fouling and operating time. If the membrane pressure differential continues to rise and cannot be effectively reduced through mechanical flushing and ultrasonic assistance, the frequency of chemical flushing is increased. Regularly check the concentration and reserve of the citric acid solution to ensure it is properly dissolving inorganic scale.

[0063] The biological purification module 2 is equipped with a dynamic culture system, and the sensor monitors the COD and dissolved oxygen (DO) concentration of the wastewater in the biological purification module 2 in real time. The intelligent control module 5 uses the PID algorithm based on the monitoring data. Automatically adjust the aeration volume of the aerator to maintain dissolved oxygen at 2-4 mg / L. Regularly calibrate the sensor to ensure the accuracy of monitoring data. Observe microbial growth and wastewater treatment effectiveness. If the TOC removal rate is less than 60%, check whether the aeration volume is adjusted appropriately and whether slow-release nutrient capsules need to be added.

[0064] A 3D-printed porous scaffold 21 is used as a microbial carrier. Its unique porous structure provides ample attachment space for microorganisms. During the initial system startup, microorganisms must be inoculated and acclimated to the wastewater environment and form a stable biofilm on the porous scaffold 21. Biofilm activity and microbial populations are regularly monitored, and biofilm performance is evaluated by observing the wastewater treatment effect. If biofilm activity decreases, factors such as wastewater quality, aeration levels, and nutrient availability are examined and adjusted accordingly.

[0065] The intelligent control module 5 includes an AI water quality prediction unit and an IoT interaction module. The AI ​​water quality prediction unit collects historical water quality data (turbidity, conductivity, TOC) in real time, cleans and normalizes the data, removes outliers and noise, and makes the data comparable and consistent. A water quality prediction model is constructed based on the LSTM neural network, and the model is trained using the collected historical data. The prediction performance of the model is optimized by continuously adjusting the parameters of the model (such as the weight matrix W and the bias vector b). During the actual operation process, new water quality data is continuously collected, and the model is updated and optimized online to ensure that the prediction error is ≤5%. The model predicts the water quality change trend in the next hour based on the current water quality data. The intelligent control module 5 adjusts the processing parameters in advance according to the prediction results, such as adjusting the flushing frequency of the multi-stage filtration module and the aeration volume of the biological purification module 2.

[0066] The IoT interactive module allows users to view wastewater treatment progress, water quality data (such as turbidity and pH), and device status (such as membrane pressure difference and pump speed) in real time via a mobile app. The app and the intelligent control module 5 transmit data via a wireless network to ensure real-time and accurate data. The cloud server regularly collects device operating data and software version information. When a new firmware version is released, the update package is pushed to the device via the wireless network. Upon receiving the update package, the device automatically upgrades and optimizes the control strategy to adapt to water quality differences in different regions.

[0067] The clean water storage module 4 includes a deep purification unit and a water-saving water supply unit; the deep purification unit is provided with an ultraviolet disinfection module and a mineral balance module.

[0068] The UV disinfection module is installed at the outlet of the clean water tank. When the purified water passes through, the UV-CLED emits ultraviolet light with a wavelength of 254nm and an irradiation dose of ≥40mJ / cm 2 , killing bacteria in the water. Regularly check the UV-CLED's luminous intensity and irradiation time. If the luminous intensity decreases or the irradiation time is insufficient, replace the UV-CLED in time. By detecting the content of E. coli in the water, ensure that the E. coli removal rate is ≥ 99.9%.

[0069] The mineral balance system adds soluble inorganic salt sustained-release tablets. Based on real-time monitoring of the recycled water's conductivity, it automatically adjusts the release rate of the sustained-release tablets to maintain the recycled water's conductivity at 50-150μS / cm. Regularly check the remaining sustained-release tablets and add more when they are insufficient.

[0070] The water pump in the water-saving water supply unit is equipped with a variable-frequency motor. The intelligent control module 5 dynamically adjusts the water supply based on the scrubber's cleaning mode (e.g., standard / intensive mode) using the formula V = k × V0. In standard mode, k = 1; in intensive mode, k = 1.5-2. Regularly checking the pump's operating status and the variable-frequency motor's speed regulation ensures accurate water supply regulation, increasing water savings to 65%.

[0071] The multi-stage filter module features a quick-release design, with the filter element connected to the module via a sealed interface. When the filter element needs to be replaced, the user simply opens the quick-release mechanism to quickly remove the old filter element and install the new one, with replacement time less than 30 seconds. Regularly check the filter element seal to ensure there are no leaks.

[0072] The biological purification module 2 and the clean water storage module 4 are stacked in an upper and lower layer, effectively utilizing the space above the scrubber's wastewater tank. During installation, ensure that the connecting pipes between the modules are properly sealed to prevent wastewater leakage. Also, check the stability of the stacked layout to prevent module displacement or damage due to equipment vibration and other factors. This spatial reuse technology reduces the overall volume by 40% compared to traditional solutions, making it suitable for small handheld scrubbers.

[0073] Second embodiment: A method for recycling wastewater from a household floor scrubber, comprising the following steps:

[0074] Step 1: The wastewater enters the pretreatment enhancement module 1, first passes through the centrifugal pre-separation unit 12 for solid-liquid separation, and then passes through the magnetic adsorption component 13 to adsorb ferromagnetic impurities;

[0075] Step 2: The pretreated wastewater enters the multi-stage filtration module and is filtered in sequence through the pre-filtration layer 31, the precision filtration layer 32 and the deep adsorption layer 33;

[0076] Step 3: The filtered wastewater enters the biological purification module 2 and undergoes biodegradation through a dynamic culture system;

[0077] Step 4: The purified water enters the clean water storage module 4, first passes through the deep purification unit for disinfection and mineral balance adjustment, and then is transported to the floor scrubber for recycling through the water-saving water supply design;

[0078] Step 5: The intelligent control module 5 monitors the operating status of each module and water quality data in real time, automatically adjusts the processing parameters according to the results of the AI ​​water quality prediction system and the PID algorithm, and realizes remote monitoring and firmware OTA upgrades through the Internet of Things interaction module.

[0079] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0080] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0081] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device and method for recycling wastewater from household floor scrubbers, characterized in that: include: The pretreatment enhancement module includes a centrifugal pre-separation unit and a magnetic adsorption component. The centrifugal pre-separation unit is used to use centrifugal force to separate the wastewater with a density of ≥1.2g / cm 3 The magnetic adsorption component is used to adsorb ferromagnetic impurities in wastewater; The multi-stage filtration module is configured as a three-stage filtration system, including a pre-filtration layer, a precision filtration layer, and a deep adsorption layer. The multi-stage filtration module is configured; The pre-filtration layer uses a 50-mesh stainless steel filter to quickly intercept large particles of impurities; The precision filtration layer uses a porous ceramic membrane with a pore size of 0.1 μm and a titanium dioxide photocatalytic coating on the surface to decompose organic pollutants under ultraviolet light; The deep adsorption layer is filled with activated carbon fiber felt to adsorb dissolved organic matter and odor; The biological purification module is equipped with a dynamic cultivation system, built-in sensors to monitor COD and dissolved oxygen (DO) concentrations in real time, and automatically adjusts the aeration volume through a PID algorithm; a 3D-printed porous scaffold is used as a microbial carrier; The intelligent control module includes an AI water quality prediction unit and an IoT interaction module. The AI ​​water quality prediction unit builds a water quality prediction model based on an LSTM neural network, inputs historical water quality data, and predicts water quality trends over the next hour. The IoT interaction module supports a mobile app to view wastewater treatment progress, water quality data, and equipment status in real time, and pushes firmware updates through a cloud server to automatically optimize control strategies. The clean water storage module includes a water quality monitoring sensor, a deep purification unit and a water-saving water supply unit; the deep purification unit is equipped with an ultraviolet disinfection module and a mineral balance module. The ultraviolet disinfection module uses UV-CLED disinfection to kill bacteria; the mineral balance module adds soluble inorganic salt sustained-release tablets; the water pump of the water-saving water supply unit is equipped with a variable frequency motor, which dynamically adjusts the water supply according to the cleaning mode of the floor scrubber.

2. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: The separation efficiency η of the centrifugal pre-separation unit can be calculated by the following formula: Among them, m1 is the mass of solid particles with a particle size greater than 50 μm in the wastewater before entering the centrifugal pre-separation unit, and m2 is the mass of solid particles with a particle size greater than 50 μm in the wastewater after passing through the centrifugal pre-separation unit.

3. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: The adsorption rate α of the magnetic adsorption component can be calculated by the following formula: Among them, m 铁1 is the mass of ferromagnetic impurities in the wastewater before entering the magnetic adsorption component, m 铁2 It is the mass of ferromagnetic impurities in the wastewater after passing through the magnetic adsorption component.

4. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: In the precision filtration layer, the degradation rate β of the photocatalytic coating on detergent residues can be calculated by the following formula: Among them, C1 is the concentration of detergent residue in the wastewater before entering the precision filtration layer, and C2 is the concentration of detergent residue in the wastewater after passing through the precision filtration layer.

5. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: In the biological purification module, the formula for adjusting the aeration volume Q using the PID algorithm is: Among them, e(t) is the deviation between the set value and the real-time monitoring value of dissolved oxygen, K p is the proportionality coefficient, K i is the integral coefficient, K d is the differential coefficient.

6. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: In the AI ​​water quality prediction system, the output value y of the LSTM neural network t The calculation formula is: Among them, x t is the input vector, h t is the hidden state vector, c t is the cell state vector, i t is the input gate, f t is the forget gate, g t is the candidate cell state, o t is the output gate, σ is the Sigmoid function, tanh is the hyperbolic tangent function, ⊙ is the element-by-element multiplication, W is the weight matrix, and b is the bias vector.

7. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: The multi-stage filtration module is provided with an intelligent flushing unit, which is integrated with a positioning tube, a rotating sleeve and a brush. The rotating sleeve is driven to rotate by a magnetic ring, and the brush cleans impurities on the surface of the ceramic membrane to clean the pollutants on the surface of the ceramic membrane; the rotation speed of the brush is dynamically adjusted according to the degree of membrane contamination, and the degree of membrane contamination can be measured by the ratio of the membrane pressure difference ΔP to the initial membrane pressure difference ΔP0. When the brush speed increases to 100-150rpm; when The brush speed is maintained at 50-100rpm.

8. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: In the water-saving water supply design of the clean water storage module, the relationship between the water supply volume V of the water pump and the cleaning mode of the floor scrubber can be determined by the following formula: V = k × V0; Among them, V0 is the water supply in the standard cleaning mode, k is the coefficient, k=1 in the standard mode, and k=1.5-2 in the strong mode.

9. The household floor scrubber wastewater recycling device according to claim 1, characterized in that: The device adopts a modular integrated design, and the multi-stage filtration module adopts a quick-release design to reduce the time of filter element replacement; the biological purification module and the clean water storage module adopt an upper and lower stacking layout, utilizing the top space of the floor scrubber sewage tank.

10. A method for recycling wastewater from a household floor scrubber, based on a device for recycling wastewater from a household floor scrubber according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The wastewater enters the pretreatment enhancement module, first passing through the centrifugal pre-separation unit for solid-liquid separation, and then passing through the magnetic adsorption component to adsorb ferromagnetic impurities; Step 2: The pretreated wastewater enters the multi-stage filtration module and is filtered through the pre-filtration layer, precision filtration layer and deep adsorption layer in sequence; Step 3: The filtered wastewater enters the biological purification module and undergoes biodegradation through a dynamic cultivation system; Step 4: The purified water enters the clean water storage module, first passes through the deep purification unit for disinfection and mineral balance adjustment, and then is transported to the floor scrubber for recycling through the water-saving water supply design; Step 5: The intelligent control module monitors the operating status of each module and water quality data in real time, automatically adjusts the processing parameters based on the results of the AI ​​water quality prediction system and the PID algorithm, and realizes remote monitoring and firmware OTA upgrades through the IoT interaction module.

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