2668 results about "Backwashing" patented technology

The invention provides a zero-discharge treatment process for recycling production wastewater, and relates to the technical field of water treatment and recycling, and the zero-discharge treatment process comprises the following steps: S1, oxidizing and degrading COD through ozone and a Fenton reagent, and generating a flocculatable intermediate; s2, intercepting suspended matters by using a gradient aperture filter bed in a grading manner, and monitoring a dynamic membrane resistance coefficient delta Rm in real time to automatically trigger backwashing; s3, coupling an ultrafiltration reverse osmosis membrane to realize that the organic matter rejection rate eta is greater than or equal to 98%, and synchronously regulating and controlling flux and operation pressure by an online spectrometry; s4, regulating and controlling the current density by adopting a rotational flow electric flocculation reactor for directional crystallization to produce industrial salt with Cl <-> less than or equal to 50mg / L; and S5, based on the total dissolved solid recovery rate TR and the comprehensive energy consumption, establishing a multi-target optimization model for real-time parameter adjustment. According to the method, a membrane pollution early warning and backwashing dynamic response mechanism is constructed through cross-scale cooperative regulation and control of delta Rm and the retention rate eta, and a catalytic oxidation effect strengthening and electric crystallization parameter self-tuning technology is combined, so that the problem of cooperative optimization of high-salinity wastewater salt gradient separation and pollutant deep removal is solved.

The invention relates to the technical field of water filtering treatment, in particular to a remote parameter self-regulation and control method based on a backwashing water filter. The method comprises the following steps: firstly, acquiring a water flow influence degree at the current moment according to a change condition of an inlet flow value in a preset influence time period at the current moment; according to the distribution difference condition of the flow velocity monitoring vectors of all the monitoring positions at the current moment, obtaining the blocking measurement at the current moment; and fusing the trend anomaly measurement, the water flow influence degree and the blocking measurement at the current moment, obtaining an adjustment demand degree at the current moment, adjusting a preset pressure difference threshold value, obtaining an adjusted pressure difference threshold value of the backwashing water filter at the current moment, and controlling the backwashing water filter. According to the invention, the preset pressure difference threshold value of the backwash water filter is dynamically adjusted, so that the requirement of the real-time operation condition of the backwash water filter is met, and the backwash accuracy is further guaranteed.

The invention provides an intelligent water-saving control method and system for an agricultural irrigation device, and the method comprises the following steps: generating a farmland state prediction index based on soil comprehensive information, weather information and crop information, and generating a farmland irrigation strategy; calculating an irrigation emergency degree based on the farmland state prediction index; if the irrigation emergency degree reaches the highest emergency degree, the filtering irrigation module is controlled to execute alternate irrigation operation; if the irrigation emergency degree does not reach the highest emergency degree, calculating to obtain the backwashing emergency degree of the filtering irrigation module; if the backwash emergency degree is greater than or equal to the irrigation emergency degree, generating a backwash strategy, and sequentially executing the backwash strategy and the farmland irrigation strategy; if the backwash emergency degree is smaller than the irrigation emergency degree, the filtering irrigation module is controlled to execute alternate irrigation operation on the target farmland. According to the invention, intelligent irrigation and backwashing control can be realized, and a better water-saving effect is achieved.

The invention discloses a purification device for aquaculture wastewater, and relates to the technical field of wastewater purification. Comprising a box body as well as a physical filter tank and a biochemical bacterium culture tank which are arranged in the box body, and further comprises a microfiltration assembly arranged in the physical filter tank, the microfiltration assembly comprises a filter cartridge rotationally connected to the interior of the physical filter tank, a backwashing pipe is fixedly connected to the interior of the physical filter tank, and a sewage collecting tank is arranged in the filter cartridge; a cleaning assembly matched with backwashing to improve the cleaning effect of the filter cartridge is arranged in the filter cartridge, the cleaning assembly comprises a floating plate arranged in the filter cartridge, a connecting rod slidably penetrates through the floating plate, and the upper end of the connecting rod penetrates through the dirt collecting tank and is fixedly connected with a first cleaning brush; stubborn attachments such as mycoderm and caustic soda attached to the inner wall of the filter cartridge can be brushed off by utilizing the first cleaning brush, and the cleaning effect on the filter cartridge can be improved by matching with backwashing, so that the attachments on the inner wall of the filter cartridge can be massively washed off, the backwashing period is shortened, and the blockage probability of the filter cartridge is reduced.

The invention relates to the technical field of ballast water treatment, in particular to a ballast water treatment-ultraviolet cooperative control method and system based on multi-parameter feedback, and the method comprises the steps: collecting turbidity, pressure gradient, ultraviolet light transmittance and biological activity data in real time through multiple types of sensors arranged at an inlet of a filter unit, the surface of a filter screen and an ultraviolet reactor; a composite control model fusing hydromechanics and optical characteristics is constructed, and closed-loop cooperation of aperture dynamic adjustment, ultraviolet dose compensation and directional backwashing is realized. The method is characterized in that an electrostriction filter screen is adopted to realize local aperture gradient control so as to balance flux and precision; an ultraviolet dose dynamic compensation algorithm is designed, and the irradiation efficiency is enhanced and improved in combination with a vortex flow field; and establishing a linkage optimization mechanism of the backwashing period and the service life of the equipment. A real ship verifies that the method can effectively reduce comprehensive energy consumption, can adapt to water quality fluctuation of different sea areas in the world, and meets the long-acting compliance requirement of the IMOD-2 standard.

The invention relates to the technical field of flood purification treatment, and discloses a flood percolation and purification system based on artificial intelligence. A flood data acquisition unit of the system acquires physical characteristics and chemical components of flood in real time, extracts multi-dimensional water quality indexes, identifies pollution concentration abnormal areas through a neural network, and generates an infiltration medium pollution load distribution diagram; a percolation layer state analysis unit calls high-load area data, recognizes percolation layer blockage and saturation segments in combination with historical percolation efficiency, and generates a percolation efficiency attenuation interval; the purification medium regulation and control unit extracts the purification efficiency and the regeneration state according to the attenuation interval, judges the medium failure condition and generates a purification medium dynamic adjustment strategy; and the purification process execution unit calls the regulation and control parameters, detects the pressure change and the pollutant interception amount, identifies the interlayer synergistic effect strength, and generates a purification medium backwashing instruction to control the start and stop of a purification layer high-pressure backwashing pump after reaching the standard.

The invention discloses a tap water advanced oxidation reactor, and relates to the technical field of tap water advanced oxidation, the tap water advanced oxidation reactor comprises a reactor shell, an ultraviolet lamp tube is installed in the reactor shell, the outer surface of the ultraviolet lamp tube is fixedly sleeved with a quartz sleeve, and the bottom of the reactor shell is provided with an inclination angle adjusting mechanism. According to the advanced oxidation reactor for tap water, by arranging the cleaning mechanism, the backwashing mechanism and the driving mechanism, cleaning of the outer surface of the quartz sleeve is achieved, meanwhile, all-directional backwashing of filter screen holes is facilitated, impurities accumulated in the filter screen holes can be effectively removed, and smoothness of a water inlet is guaranteed; the invention discloses a low-pressure ultraviolet reactor, which solves the problems that the resistance of water flow passing through a pipeline filter screen is increased and the water inlet speed is slowed down due to the condition that the existing equipment is inconvenient to regularly clean a low-pressure ultraviolet lamp tube in the low-pressure ultraviolet reactor and the pipeline filter screen is inconvenient to regularly clean and the pores of the pipeline filter screen are blocked due to long-time use.

The invention discloses continuous purification equipment for sewage treatment, and relates to the technical field of sewage treatment, the continuous purification equipment comprises a treatment cylinder, the top of the treatment cylinder is provided with a cylinder cover, and the side wall of the treatment cylinder is provided with a mounting rack. Through the arrangement of the baffle, the sealing plate, the L-shaped telescopic plate, the limiting column, the chute, a limiting plate, an adjustable-speed motor, a first bevel gear, a second bevel gear, a connecting shaft and a mounting block, the blockage time of the filtering mechanism is adaptively judged along with the adding amount of a flocculating agent, so that the backwashing frequency of the filtering mechanism is adjusted, manual adjustment is not needed, convenience and rapidness are achieved, and the practicability is high. The device is simple in structure and high in applicability, through the arrangement of the filtering mechanism, automatic overturning for backwashing along with the blocking speed of the first filter plate is achieved, no additional water resource is needed for backwashing, and through the arrangement of the second filter plate, when the first filter plate is overturned for backwashing, the second filter plate can continue to conduct certain filtration; continuous filtration of sewage is ensured, and the sewage treatment working efficiency is improved.

The invention discloses a filter intelligent backwashing control system based on a pressure sensor, and relates to the technical field of intelligent equipment, and the filter intelligent backwashing control system comprises the following steps: S1, the system firstly executes pressure difference reference initialization, and determines a pressure difference reference value; s2, constructing a corrected differential pressure offset model, and determining the current differential pressure offset of the system; s3, constructing a blockage risk assessment model, and pre-judging whether the system needs to start backwashing or not; s4, carrying out segmented pulse backwashing control; and S5, constructing a closed-loop judgment model, and evaluating the actual backwashing effect of each stage. According to the method, a high-credibility differential pressure reference is obtained through a reference calculation model; the blocking trend is tracked in real time through the moving average pressure difference offset; constructing a blockage risk coefficient fusing the offset, the offset rate and the duration, and judging the flushing opportunity in multiple dimensions; a three-section flow is adopted to distribute flushing strength and duration according to needs; and after each section of pulse is finished, the backwashing effect is evaluated in a closed-loop manner through the closed-loop judgment model.

The invention relates to the field of water treatment and video treatment, and discloses a water plant coagulating sedimentation effect estimation method, system, medium and equipment based on alumen ustum target tracking, and the method comprises the following steps: collecting alumen ustum video images, and aligning online flow water quality instrument data with the alumen ustum video images; inputting the aligned online flow water quality instrument data and alumen ustum video images into a video target tracking large model, tracking each alumen ustum target, and constructing the form and motion characteristics of alumen ustum to obtain alumen ustum characteristic data; based on alumen ustum characteristic data and online flow water quality instrument data, a sedimentation tank effluent turbidity estimation model is trained; reading alumen ustum video streams and online instrument data on line, inputting the alumen ustum video streams and the online instrument data into the large video target tracking model, and estimating the effluent turbidity of the sedimentation tank through the effluent turbidity estimation model of the sedimentation tank. The risk that the adding amount of the coagulant is not adjusted in time can be reduced, the water quality stability of effluent of the sedimentation tank is improved, and the backwashing frequency and economic cost of the filter tank are reduced.

The invention relates to a continuous flow AOA whole-course anaerobic ammonia oxidation self-enrichment enhanced denitrification system and method, and the system comprises a front anoxic tank, an aerobic tank and a rear anoxic tank which are connected in series, and is filled with a biological filler; the monitoring aeration device comprises an ammonia nitrogen detector and an aeration unit which are connected with the aerobic tank; the reflux device is used for communicating a reflux outlet of the rear anoxic tank with water distribution of the front anoxic tank; and the PID control unit is connected with the monitoring aeration device, the backwashing control valve and the reflux device. The method comprises the following steps: sewage flows into the front anoxic tank, the aerobic tank and the rear anoxic tank; regulating and controlling the reflux ratio to domesticate the biological membrane of the aerobic tank; the ammonia nitrogen concentration of effluent of the aerobic tank is detected in real time through an ammonia nitrogen detector, and the PI D control unit dynamically adjusts the aeration rate of the aerobic tank according to the ammonia nitrogen concentration value and a preset target value, so that the aerobic tank and the rear anoxic tank form an anaerobic ammonium oxidation bacteria self-enrichment environment; the backflow device is used for enabling effluent of the rear anoxic tank to flow back to the front anoxic tank according to a preset proportion, so as to form a whole-process anaerobic ammonia oxidation self-enrichment environment.

The detachable reactor comprises a water supply pipe, a communicating pipe and a plurality of barrel sets, each barrel set is formed by splicing a top cover, an upper barrel, an upper grating net, a main barrel, a lower grating net, a lower barrel and a bottom cover, and the bottom cover is connected with a water inlet pipe, a water drainage pipe and a series connection pipe through a first reversing valve; the top cover is provided with a water outlet pipe with a valve and flushing pipes, the water supply pipe is provided with a water supply pump and a box body, the box body is provided with a sewage pipe and a dosing mechanism, the communicating pipe is communicated with the series connection pipes and the flushing pipes and provided with a second reversing valve, inner cavities of the upper cylinder and the lower cylinder are filled with filter materials, and an inner cavity of the main cylinder is filled with catalytic filler. Sewage is filtered and catalytically decomposed by using the filter material and the catalytic filler in the cylinder group, the cylinder group is convenient to disassemble for cleaning and replacement, and series connection, parallel connection and backwashing work of the plurality of cylinder groups can be realized through cooperation of each pipeline and each valve, so that the sewage treatment effect is ensured, and the sewage treatment efficiency is improved.

The invention relates to a spray scrubbing tower with a built-in intelligent backwashing function, and aims to improve the industrial waste gas treatment efficiency and reduce the equipment maintenance cost, the spray scrubbing tower comprises a monitoring module, a control module, an execution module, an adjustment module and an analysis module, all the modules are connected with one another through data links to form a closed-loop control system, and the monitoring module is connected with the control module. Compared with the prior art, manual intervention is remarkably reduced, the cleaning efficiency is improved, the use amount of a backwashing medium is reduced, and the device has good economic benefits and environmental adaptability and is suitable for various industrial waste gas treatment occasions.

The invention discloses an ultra-large flow intelligent liquid inlet automatic backwashing filter station, and relates to the technical field of filter stations, the ultra-large flow intelligent liquid inlet automatic backwashing filter station comprises a mounting station, a filter assembly is arranged in the mounting station close to the front surface, and the filter assembly comprises a filter tank; according to the ultra-large-flow intelligent liquid inlet automatic backwashing filter station, when the ultra-large-flow intelligent liquid inlet equipment needs automatic backwashing, a first electromagnetic valve and a second water pump are closed through a controller, and two electromagnets are electrically connected with an external power supply, so that two lifting blocks move downwards and are inserted into two corresponding mounting grooves; the stepping motor is started to drive the filter element and the spray head to rotate, after the spray head enters the filter element, the first water pump is started, so that dirt on the inner wall of the filter element is cleaned, and the problem that the filter element which is seriously polluted and is not thoroughly cleaned is easily caused by unified backwashing in the filter equipment in the prior art is solved by separately cleaning each filter element.

The invention discloses an intelligent self-adaptive silt filtering system and method for a pumped storage power station, and belongs to the technical field of pumped storage power stations. The system comprises a multi-parameter water quality monitoring module, an intelligent self-adaptive filtering module, a hydraulic cyclone enhanced separation module, a self-cleaning and backwashing module and a central control and data processing module. According to the method, river sediment characteristics are monitored in real time, filtering parameters are dynamically adjusted through an artificial intelligence algorithm, efficient sediment interception is achieved by combining hydraulic cyclone separation and multi-stage filtering, the problem of filtering medium blockage is solved through a self-cleaning mechanism, and meanwhile the self-adaptive learning capacity is achieved so as to optimize system performance. The system can significantly improve the filtering efficiency, reduce energy consumption and operation and maintenance cost, adapt to complex water quality working conditions, and guarantee safe and stable operation of key equipment of the pumped storage power station.

The invention relates to the technical field of petroleum filtering, in particular to a petroleum filtering device and a using method.The petroleum filtering device comprises a filter body, a data collecting assembly and a data processor, and the data collecting assembly obtains petroleum state data of a liquid inlet and a liquid outlet of the filter body within a target time period; the data processor obtains suspected abnormal state data in the petroleum state data and corresponding suspected moments, and based on the suspected abnormal state data of all the suspected moments, target suspected pollution degrees of all the suspected moments are obtained; based on the numerical value change trend and the time continuity of the target suspected pollution degree of all the suspected moments, the pseudo-abnormal degree of the target time period is obtained, then the real pollution degree of the cut-off moment of the target time period is obtained, the next backwashing moment is obtained according to the real pollution degree, the accuracy of the backwashing moment is improved, and the backwashing efficiency is improved. And finally, the accuracy of backwashing starting control is improved, and the efficiency of the petroleum filtering device is improved.

The invention belongs to the technical field of natural gas transportation and distribution filtration of natural gas stations, and relates to a filter and a filter element backwashing method thereof without stopping natural gas transportation and distribution filtration. The filter comprises a main cylinder, a main filter element and a backwashing device, wherein the backwashing device comprises an air blowing cylinder arranged in the main filter element, a high-pressure hose used for conveying high-pressure gas into the air blowing cylinder and a driving mechanism used for driving the air blowing cylinder to reciprocate in the main filter element in the axial direction; the air blowing cylinder is of a cylindrical structure with two closed ends, and a plurality of air blowing holes are formed in the side wall; the high-pressure hose is located in the main filter element, the bottom end of the high-pressure hose is connected to the top end of the air blowing cylinder, the top end of the high-pressure hose is externally connected with a high-pressure air supply source, and high-pressure air entering the air blowing cylinder is blown out through the air blowing holes to backwash the main filter element from inside to outside. The air blowing cylinder of the filter can perform movable backwashing in the main filter element, so that the whole main filter element is helped to recover the filtering effect, and the backwashing device can independently operate to backwash the main filter element while the filter continuously filters natural gas.

The invention discloses a regulation and control method for stably improving the water quality of water produced by a reverse osmosis system of a power plant, and relates to the field of water quality regulation and control, which comprises the following steps: configuring a water inlet flow regulation device, performing initial setting, configuring the position of an online sensor, performing data acquisition, setting judgment rules of turbidity, differential pressure and transmembrane pressure difference, and determining the water quality. And configuring a flocculant adding device and adding control logic, configuring a backwashing and adding linkage control state machine, and carrying out data smoothing, trend analysis and self-adaptive threshold adjustment. When the water quality of the raw water fluctuates for a short time or the pollution load is increased, dynamically adjusting the water inlet flow, the backwashing intensity and the flocculant adding concentration based on parameters such as turbidity, pollution index, conductivity and pressure difference which are acquired by an online sensor in real time; and meanwhile, the concentrated water reflux proportion and the high-pressure pump frequency are automatically corrected by continuously calculating the desalting rates of the first-stage and second-stage reverse osmosis devices, so that the running state of the membrane component is kept in an optimal interval.

The invention relates to the technical field of ammonia water preparation, in particular to a raw water reverse osmosis treatment device for ammonia water preparation, which comprises a shell, the shell is formed by fixing an upper shell and a lower shell, a water inlet pipe is fixed in the middle of the top of the shell, a high-pressure water inlet component is arranged at the top of the water inlet pipe, and a concentrated water outlet pipe is fixed in the middle of the bottom of the shell. A drain valve is fixedly mounted at the bottom of the concentrated water outlet pipe; and the water pressure stabilizing assembly is arranged at the top of the inner wall of the shell. A multi-level pressure regulation and control mechanism is constructed in the reverse osmosis process, the problem of instantaneous pressure impact when the high-pressure pump is started is solved, physical damage to the membrane is avoided, a dual anti-blocking system of active rotary cleaning and back flushing is constructed, the membrane blocking probability is greatly reduced, meanwhile, the impact force of water flow is fully weakened in the back flushing stage, and the reverse osmosis efficiency is improved. It is ensured that the reverse osmosis membrane bears stable pressure all the time, and the problem of secondary damage to the reverse osmosis membrane caused by too large instantaneous pressure in the backwashing stage is avoided.

The utility model discloses a waste liquid treatment device, which relates to the technical field of metal smelting waste liquid treatment and comprises a mixing box and a filter box, the mixing box is fixedly mounted on the outer upper wall surface of the filter box, a guide pipe is connected between the mixing box and the filter box, and a first electromagnetic valve is fixedly mounted on the guide pipe. Waste liquid and liquid medicine are mixed through the stirring assembly in a stirring mode of a plurality of stirring plates which rotate and revolve, the mixing uniformity of the waste liquid and the liquid medicine is improved, the waste liquid is filtered through the liquid inlet pipe and the liquid outlet pipe, and the waste liquid and the liquid medicine are mixed through the liquid inlet pipe and the liquid outlet pipe. By closing the second valves on the liquid inlet pipe and the liquid outlet pipe, a water source enters through the second pipeline and is discharged from the first pipeline, backwashing of the filter screen plate is achieved, the stirring box and the filter box can be cleaned, the cleaning work efficiency of the filter screen plate is improved, and the cleanliness of the waste liquid treatment device is improved.

The invention discloses a self-adaptive adjustment magnetic separation-membrane filtration coupling sewage treatment system and a self-adaptive adjustment magnetic separation-membrane filtration coupling sewage treatment method. The system comprises a pretreatment unit, a magnetic separation core unit, a self-adaptive intermediate buffer unit, a membrane filtration unit and a sludge treatment unit which are communicated in sequence. The core of the system is that a plurality of on-line sensors are linked through a central control system, water quality parameters are monitored in real time, the adding amount of magnetic powder and a coagulant, the rotating speed of a stirrer, the membrane flux, the backwashing period and a cleaning program are adjusted in a self-adaptive mode, and intelligent cooperation and accurate regulation and control of magnetic separation and membrane filtration processes are achieved. According to the invention, the problems of easy membrane pollution, high magnetic powder consumption, high operation cost and dependence on manual operation in the traditional process are effectively solved, the service life of the membrane is obviously prolonged, the operation and maintenance cost is reduced, and the effluent quality is stable and meets the high-standard discharge or reuse requirement.

The invention relates to the field of ginsenoside extraction, in particular to a device and method for removing a plasticizer in a ginsenoside extract, and the device comprises a roll-over stand, a removal cabin and the like. According to the equipment and the method for removing the plasticizer in the ginsenoside extract, the filtering assembly and the adsorption resin blocks are distributed in the removal cabin in the vertical direction, so that fine filtering treatment and adsorption removal treatment of a ginsenoside extract solution are completed in sequence; and in addition, the filter assembly and the plurality of adsorption resin blocks can be subjected to backwashing treatment in a mutually separated state, so that the overall treatment process steps of the backwashing treatment work are reduced on the basis of ensuring that efficient backwashing treatment is synchronously performed on the filter assembly and all the adsorption resin blocks. The defects that multiple treatment devices need to be used in multiple filtering treatment and ion adsorption treatment processes of the ginsenoside extract solution, the plasticizer removal treatment efficiency is affected, and the plasticizer removal treatment period is delayed are overcome.

The invention discloses a sewage treatment system and method based on combination of ultrasonic micro-electrolysis and catalytic oxidation, and relates to the technical field of environmental protection, and the method comprises the following steps: sewage is pretreated by generating active free radicals through ultrasonic enhanced micro-electrolysis, and then enters a catalytic oxidation unit to be deeply mineralized together with ozone; the ultrasonic power, the ozone adding amount and the reflux ratio are dynamically adjusted through the fluid circulation and intelligent control unit; and the tail water is fed back through online monitoring to reach the standard. The system integrates an ultrasonic micro-electrolysis module, a catalytic oxidation module, an intelligent control module and an automatic backwashing module, and realizes closed-loop optimized operation. The method solves the problems of low treatment efficiency of refractory organic matters, strong drug dependence, easy damage of equipment, poor adaptability and the like in the prior art, obviously improves the COD removal rate to 95% or above, reduces the energy consumption by 20%, does not need additional drugs, is suitable for high-difficulty wastewater treatment of printing and dyeing, pharmacy and the like, and has the advantages of high efficiency, stability, low consumption and engineering.

The utility model discloses a prefilter which comprises a shell part and a filter element, the shell part is provided with a water inlet, a water outlet and a drain outlet, the filter element is arranged in the shell part and is matched with the shell part to form a raw water cavity communicated with the drain outlet and a purified water cavity communicated with the water outlet, a water inlet channel is arranged between the water inlet and the raw water cavity, and a water outlet channel is arranged between the water inlet and the purified water cavity. A backwashing channel is arranged between the water inlet and the water purification cavity, and a plugging piece for opening and closing the sewage draining exit is arranged at the sewage draining exit; and the water path switching mechanism is arranged on the shell part and is used for controlling the switching opening of the water inlet channel and the backwashing channel. When the pre-filter disclosed by the utility model is in a filtering state, the backwashing channel is in a closed state, so that if a backwashing filter screen is arranged on the backwashing channel, the backwashing filter screen cannot filter water flow in the filtering state, so that dirt on the backwashing filter screen can be reduced, and normal filtering of the backwashing filter screen in the backwashing state is ensured.

The invention relates to the technical field of water treatment equipment, in particular to a coaxial nested ultrafiltration and nanofiltration integrated water purification device and system.The coaxial nested ultrafiltration and nanofiltration integrated water purification device comprises a main shell, and an annular ultrafiltration treatment area and an inner nanofiltration treatment area are coaxially arranged in the main shell. An energy storage adjusting assembly is arranged in the nanofiltration treatment area and comprises an elastic breathing sleeve coaxially arranged outside the nanofiltration membrane assembly in a sleeving mode. The sleeve elastically expands during filtering, so that the effects of buffering pressure and storing energy are achieved; and turbulent flow convex ribs can be arranged on the inner wall of the sleeve, so that the nanofiltration membrane is physically cleaned when the sleeve retracts. Besides, a backwashing pipeline and a valve are arranged, linkage control is carried out when the control unit detects that expansion of the sleeve exceeds the limit, and ultrafiltration produced water stored on the nanofiltration side is reversely pushed by utilizing pressure energy released by retraction of the sleeve so as to backwash an ultrafiltration membrane. According to the invention, the cooperation of pressure buffering, online cleaning of the nanofiltration membrane and energy storage backwashing of the ultrafiltration membrane is realized, the operation is stable, the efficiency is high, and the energy is saved.

The invention belongs to the technical field of water treatment, and particularly relates to bypass flow water treatment equipment which comprises a base, a purification tank, a water path control assembly and a water pump are fixed to the upper side of the base, and the water pump is fixedly connected with the purification tank through the water path control assembly. Therefore, the damage of impurities in water to the pump body can be greatly reduced, the service life of the pump body can be prolonged, and particularly, the water treatment system of the equipment does not need to be additionally provided with a prefilter, so that the use cost and the maintenance frequency of the equipment can be reduced; when backwashing is carried out, water flow enters from the water inlet pipe, flows to the second connecting part and then enters the purification tank from the second connecting part, and then the water flow entering the purification tank is discharged through the first connecting part, so that a water pump of the equipment does not work while backwashing is realized; therefore, the energy consumption of the equipment and the service life of the water pump can be reduced.

The invention discloses an integrated device and method for comprehensively evaluating and measuring the filtering performance of a filter material in a filter tank. The integrated device comprises a box body structure, wherein a water inlet and outlet system, a filtering system, a backwashing system, a pressure difference measuring pipe system, a PLC control system and the like are arranged in the box body; the device adopts a water pump to feed water, the water inlet pressure adjusting range is wide, and the pressure drop difference of the filter layer can be equal to the thickness in a proper particle size range; when the filtering speed is too high, the permeability coefficient can be analyzed by adopting two or more than two pressure drop differences and an instantaneous filtering speed fitting change curve. The filtering system can set constant filtering speed and turbidity (suspended solids), the turbidity (suspended solids) and head loss are measured after the filtering system runs for a certain time, and the filtering performance of the filtering system is analyzed according to an index system. The water inlet and outlet ports of the filter column are arranged at equal intervals and in equal size, the measuring pipe can be detached and heightened, filter materials do not need to be replaced, gas and water backwashing can be achieved, integrated movement can be achieved, and switching of analysis and measuring modes of filter layers with different heights in the filter column is facilitated.

The invention relates to the technical field of membrane cleaning, in particular to a ceramic membrane backwashing method, electronic equipment and a storage medium. The invention provides a backwashing method of a ceramic membrane. The backwashing method comprises the following steps: firstly, acquiring process parameters of the ceramic membrane during operation in real time; then analyzing a pollution mechanism based on the process parameters, and calculating a comprehensive pollution degree and a dominant pollution type; then, according to the comprehensive pollution degree and the dominant pollution type, a multi-stage backwashing flow state sequence is matched and generated from a predefined multi-stage flow state strategy library; and finally, aiming at each target flow state in the multi-stage backwashing flow state sequence, respectively generating a corresponding gas pulse control parameter and a corresponding water pulse control parameter, and sequentially executing the gas pulse control parameter and the water pulse control parameter. According to the present invention, the multi-stage flow state control dynamically adapting to the pollution characteristics is adopted to replace the traditional fixed flow state mode, such that the problems of insufficient pertinence and poor backwashing effect caused by the fixed flow state are solved, and the backwashing efficiency of the ceramic membrane is improved.

The invention relates to the technical field of filtering devices, and particularly discloses a refined sulfuric acid filtering device which comprises a tank body, a plurality of vertical filter elements, a backwashing mechanism and a slag removal ring, the backwashing mechanism comprises a piston, a push rod and a driving assembly, a first magnetic component is embedded in the piston, and the piston can move downwards in the filter element, so that the pressure of filtrate is increased, and backwashing is realized; each filter element is sleeved with the slag removal ring, a second magnetic component is embedded in the slag removal ring, and the slag removal ring is driven by the piston to remove filter residues on the outer wall of the filter element. According to the refined sulfuric acid filtering device, filter residues on the outer wall of the filter element can be removed, the filter element can be backwashed, the cleaning treatment effect is good, the filtering efficiency of the filter element can be guaranteed, and the working life is remarkably prolonged; the whole equipment is based on automatic design, the cleaning treatment work is fast and efficient, online operation is achieved, and the production process cannot be remarkably affected; the filtering device is simple in structure, easy to implement, less in energy consumption during backwashing, low in operation cost, energy-saving and environment-friendly.

The invention discloses a sewage treatment device, and belongs to the field of sewage treatment.The sewage treatment device comprises a treatment box, a primary filtering chamber, a secondary filtering chamber and a dosing chamber, the primary filtering chamber, the secondary filtering chamber and the dosing chamber are sequentially arranged in the treatment box, the two ends of the secondary filtering chamber communicate with the primary filtering chamber and the dosing chamber correspondingly, and a filtering cylinder is vertically and rotatably arranged in the secondary filtering chamber; the filter cartridge is connected with a rotary driving motor fixed at the top end of the treatment box through a belt pulley and a belt, and a backwashing mechanism is also arranged on one side of the filter cartridge and is communicated with a water outlet of the secondary filter chamber. By adopting the sewage treatment device, efficient, reliable and energy-saving sewage treatment is realized through multi-stage filtration, efficient backwashing, automatic operation and modular design, and the sewage treatment device is suitable for being applied to various sewage treatment scenes.