1243 results about "Water processing" patented technology

A clothes dryer using an LED light source is proposed. Instead of using a heater, a blowing fan, and a heat exchanger, the clothes dryer employs a plurality of LED light source modules provided in a body and efficiently arranged therein and an air circulation structure of an air circulation part having a blowing fan arranged in the inner rear side thereof, and is configured to sterilize air through an air sterilization part, absorb and dry moisture by a ceramic filter, and then finally discharge the air to the outside through an exhaust fan. Therefore, without requiring a separate water discharge treatment process in an existing method, the clothes dryer can achieve efficient drying of clothes and drying of clothes without damage.

The invention discloses wastewater treatment circulating equipment for water-based ink production, and relates to the technical field of wastewater treatment.The wastewater treatment circulating equipment comprises a box body, a bottom plate is fixedly connected to the bottom face of the box body, mounting grooves are formed in the two sides of the bottom plate, and a control panel is fixedly mounted on the surface of the box body; a drainage pipe is fixedly connected to one side of the box body, a valve is arranged on the drainage pipe, a frame is fixedly installed on the surface of the box body, handles are fixedly connected to the two sides of the frame, supporting plates are fixedly connected to the front side and the rear side of the frame, and supporting plates are fixedly connected to the supporting plates. The device is reasonable in structure, a mixed solution in the box body can be fully reacted conveniently through cooperative use of the adjusting assembly and the stirring assembly, and then liquid attached to the surfaces of the stirring blades is scraped off through the control assembly.

The invention relates to the field of wastewater treatment, in particular to an online analysis method and system for ink-jet printing wastewater treatment data, and the method comprises the steps: obtaining the water quality, process and equipment state parameter data of ink-jet printing wastewater based on each sensor, and constructing an original data matrix through preprocessing; decomposing the matrix, selecting a preset number of principal components for reconstruction, and generating a reconstructed data matrix; a reconstruction error is calculated by analyzing the difference between an original matrix and a reconstruction matrix, a correlation distortion index is analyzed based on row vector similarity, and an objective function is constructed to determine the number of optimal principal components; and clustering is carried out by using reconstruction errors and distances, abnormal data points are screened, and process parameters are regulated and controlled. According to the method, by optimizing the number of principal components and improving clustering analysis, the noise interference problem under complex water quality changes is effectively solved, the anomaly detection precision and the system stability are remarkably improved, and the robustness and the adaptability of an ink-jet printing wastewater treatment system are enhanced.

The invention relates to the technical field of electric digital data processing, in particular to an intelligent control method and system for boiler wastewater treatment, and the method comprises the steps: obtaining the fluctuation degree of boiler wastewater equipment at a current time node, the fluctuation degree is positively correlated with the abnormal degree of the boiler wastewater equipment at the current time node and is negatively correlated with the dynamic lag time of the boiler wastewater equipment at the current time node; and inputting the fluctuation degree into an improved machine learning model, inputting an operation state of the boiler wastewater equipment at the current time node, and controlling start and stop of the boiler wastewater equipment based on the operation state. The problem that an existing machine learning model is not high in prediction accuracy is solved.

The invention discloses a flocculation sedimentation tank for sewage treatment in oxford fabric production, and belongs to the technical field of oxford fabric production, the flocculation sedimentation tank comprises a tank body, a water inlet pipe is arranged on the upper side of one end of the tank body, a drainage pipe is arranged on the lower side of the other end of the tank body, and isolation plates are mounted on the two sides in the tank body; according to the invention, by arranging the collecting assembly, a collecting box is placed on a lifting plate, and supporting strips on two sides of the lower end of the collecting box enter grooves in the upper end of the lifting plate, so that the collecting box and the collecting box can be separated into a first water storage tank, a second water storage tank and a third water storage tank; a first magnetic strip at the lower end of a supporting strip and a second magnetic strip in a groove are adsorbed to adsorb and fix a collecting box, flocculation groups are guided into the collecting box through an inclined plate during flocculation work, meanwhile, when a lifting plate ascends, the inclined plate moves to clean the side edge of a separation plate, and the collecting box can be taken out of the lifting plate through a lifting rod to be cleaned. By arranging the mounting assembly, flocculation groups can be collected, and centralized collection and cleaning of the flocculation groups are facilitated.

The invention belongs to the technical field of metallurgical steelmaking production, and particularly relates to a control method for B-type inclusions in ultralow-sulfur steel. The production process comprises the steps of molten iron treatment, converter smelting, LF refining, RH refining, calcium treatment and soft blowing, continuous casting and hot rolling, and is characterized in that in the calcium treatment and soft blowing process, after RH is finished, a calcium line is fed for calcium treatment, the content of calcium in molten steel is reduced, and the content of calcium in tundish molten steel is controlled to be 5-10 ppm; the total air volume of soft blowing is controlled to be 80-180 NL / min, and the soft blowing time is controlled to be 7-12 min. According to the method, large-size CaO-Al2O3 series and CaS-CaO series inclusions do not exist in the molten steel, the large-size strip-string-shaped inclusions are obviously improved after hot rolling, and the cleanliness of the molten steel and the product quality are obviously improved; meanwhile, the consumption of calcium lines in the production process is reduced, and the production cost is reduced.

The invention discloses a digital control integrated system for an auxiliary workshop of a power plant, and relates to the field of digital control, which comprises the steps of configuring sensor layout and measuring points, acquiring operating parameters based on sensors, acquiring processing parameters based on sensors, acquiring noise data based on sensors, and acquiring parameters of a heat supply system based on sensors. A multi-level sensor arrangement and operation parameter acquisition module, an industrial Ethernet control and multi-protocol interconnection communication module, a dynamic threshold comparison and combined cycle working condition analysis module and a cooperative control and multi-system synchronous scheduling module are configured in a power plant auxiliary workshop. The closed-loop monitoring and secondary correction control module and the historical database archiving and optimization learning module realize unified acquisition, centralized control and intelligent optimization of a gas turbine control system, a steam turbine control system, a waste heat boiler control system, a chemical water treatment control module, an environmental protection monitoring system and a heat supply system adjusting device.

A membrane a feed flow inlet, a retentate flow outlet and a permeate flow outlet. The membrane further includes a membrane interface portion comprising a plurality of feed flow channels fluidly connected to the feed flow inlet and to the retentate flow outlet, and a plurality of permeate flow channels fluidly connected to the permeate flow outlet, wherein the membrane interface portion is operable to allow for fluid communication between the feed flow channels and the permeate flow channels through a membrane portion. The membrane interface portion includes a reduction in a dimensional property from toward the feed flow inlet to toward the retentate flow outlet so that the membrane interface portion is operable to produce a higher cross-flow velocity at the membrane portion toward the retentate flow outlet. Also provided is a water treatment module including the membrane and a process for making the membrane.

The invention discloses a boiler water treatment agent supplementing device which comprises at least one agent storage mechanism, and each agent storage mechanism comprises an agent storage tank, an agent supplementing valve communicated with the agent storage tank, an agent discharging valve and a one-way air inlet valve; and the medicine barrel clamping platform is used for fixing the medicine adding container. According to the device, the medicine barrel clamping platform is arranged to fix the medicine adding container, then the first moving assembly is used for driving the liquid outlet end of the pumping mechanism to be connected to a medicine supplementing valve of the corresponding medicine storage tank, then the second moving assembly is used for driving the cap screwing mechanism to move to a bottle cap of the medicine adding container, and the bottle cap of the medicine adding container is clamped and driven to be screwed off in a rotating mode; then the third moving assembly is matched with the second moving assembly to enable the pumping mechanism to move to the bottle opening of the dosing container, then the fourth moving assembly operates the pumping mechanism to be inserted into the dosing container, liquid in the dosing container can be extracted and injected into the medicine storage tank through the medicine supplementing valve, manual participation in the medicine supplementing process is effectively reduced, and the medicine supplementing efficiency is improved. And the purpose of improving the operation safety is achieved.

The invention belongs to the technical field of direct drinking water processing, and particularly relates to a direct drinking water softening and sterilizing device which comprises a bottom plate, the two sides of the upper end face of the bottom plate are fixedly connected with a softening pool and a sterilizing pool respectively, one side of the bottom of the softening pool is communicated with the sterilizing pool through a connecting pipe, and a drainage pipe is arranged on one side of the sterilizing pool. An ultraviolet germicidal lamp is arranged at the top of an inner cavity of the sterilization tank, and a feeding auxiliary mechanism used for uniformly adding lime and soda into the softening tank is further arranged on the softening tank. By means of the feeding auxiliary mechanism, lime and soda discharged from the discharging port can make contact with leaves, the lime and the soda are scattered, the distribution area of the lime and the soda on the water surface is enlarged, meanwhile, the caked and coagulated lime and the soda can also be scattered, and therefore the lime and the soda can be evenly added into water, and the situation that the lime and the soda are not prone to falling off due to the fact that the water surface area is too large is avoided. And an operator is not easy to uniformly add lime and soda into water.

The invention relates to the technical field of cooking equipment, and discloses a cooking equipment control method and device, cooking equipment and a storage medium, and the method comprises the steps: monitoring the temperature of a cooking cavity of the cooking equipment and the working duration of a steam generation module after the cooking equipment starts a steaming function; when the current cooking cavity temperature is smaller than the first preset temperature, the temperature difference between the set temperature corresponding to the steaming function and the current cooking cavity temperature is calculated; based on the temperature difference and the current working duration of the steam generation module, the working duration of the condensate water treatment module is determined so as to control the condensate water treatment module to start working. The starting time of the condensate water treatment module is determined, and the working time of the condensate water treatment module is determined by comprehensively considering the temperature difference between the real-time temperature of the cooking cavity and the set temperature and the working time of the steam generation module, so that the condensate water treatment module is accurately controlled to work, and the steam amount in the cooking cavity is accurately controlled; the user experience is improved, and the after-sales service cost is saved.

The utility model discloses circulating water treatment automatic dosing equipment which comprises a circulating water pipeline, the top end of the circulating water pipeline is fixedly connected with a feeding pipe, the top end of the feeding pipe is fixedly connected with a medicine box, and the upper portion of the interior of the medicine box is rotationally connected with a first stirring rod; a first stirring rod is rotatably connected to the lower portion of the interior of the pesticide box, a second stirring rod is rotatably connected to the lower portion of the interior of the pesticide box, the first stirring rod and the second stirring rod are arranged in a staggered mode, the ends of the first stirring rod and the second stirring rod extend out of the pesticide box, and one end of the first stirring rod and one end of the second stirring rod are fixedly connected with a first gear and a second gear correspondingly; and the first gear is meshed with the second gear. Through the first motor, the medicine adding roller and the feeding pipe, the medicine is stored in the storage tank through driving of the first motor, and through rotation of the medicine adding roller, the medicine can be discharged downwards to fall into the feeding pipe after rotation, and automatic medicine adding work is achieved through the structure.

The invention relates to the technical field of water treatment, in particular to a water plant process modularization deconstruction integration system, which comprises a physical module layer, a water treatment layer and a control layer, the edge intelligent control layer is connected with the physical module layer and is used for real-time data acquisition and bottom layer control; the digital twin platform layer communicates with the edge intelligent control layer and is used for constructing a high-fidelity virtual model for the physical module layer and realizing virtual-real interaction; the cloud platform AI center communicates with the digital twin platform layer and is used for operating an artificial intelligence optimization algorithm; and through self-adaptive optimization of the DRL intelligent agent, accurate control of key process parameters (such as dosage and aeration rate) can be realized, and it is predicted that the drug consumption can be reduced by 10%-25% and the aeration energy consumption can be reduced by 15%-30%.

This invention discloses a railway sleeper surface roughness treatment device and method, relating to the field of railway sleeper surface treatment technology. Key technical features include an installation area, with a traction component installed on one side of the upper end of the installation area, and a railway sleeper conveying component installed on the other side of the upper end of the installation area. A water spraying component is installed at the upper end of the installation area, outside the railway sleeper conveying component. The water spraying component includes two symmetrically installed installation boxes at the top of the installation area, with a protective cover between the two installation boxes. Two hydraulic rotating heads are installed inside the installation boxes, with a rotating disk at one end of each hydraulic rotating head and multiple nozzles installed at the other end of the rotating disk. The technical advantage of this design is that it uses a continuous conveying and processing method to treat the surface roughness of the railway sleeper body, improving overall production efficiency.

The utility model belongs to the technical field of water treatment agent feeding, and provides a pressure pump device for water treatment agent feeding, which comprises two pressure pump units, the pressure pump unit comprises a pump, a pressure gauge and a main pipe; the pump inlet is communicated with the main pipe through a liquid inlet pipe, a third valve is arranged on the liquid inlet pipe, the pump outlet is communicated with a liquid outlet pipe, a fifth valve is arranged on the liquid outlet pipe, the pressure gauge is arranged on the liquid outlet pipe through a pressure detection pipe, and a first valve is arranged on the pressure detection pipe; the pressure pump unit further comprises a back pressure valve and a return pipe, one end of the return pipe is communicated with the main pipe, the other end of the return pipe is communicated with the liquid outlet pipe, the back pressure valve is arranged on the return pipe, and a second valve is arranged on the return pipe. According to the device, the two pressure pump units are arranged for chemical feeding, and the two pressure pump units are standby for each other, so that interruption of chemical feeding can be avoided. By arranging the backflow pipe, when the pressure of the liquid outlet pipe exceeds the set pressure of the back pressure valve, the back pressure valve can be automatically opened, and the medicament in the liquid outlet pipe flows back into the main pipe.

The invention discloses waste water purification treatment equipment for dyeing and printing production, and relates to the field of waste water treatment.The waste water purification treatment equipment comprises an equipment shell and a feeding connecting pipe installed at the top of the equipment shell, a discharging pipe is installed at the bottom of the equipment shell, and four buffer tanks distributed in a central symmetry mode are arranged on the inner side of the equipment shell; a material opening is formed in one end, close to the inner side of the equipment shell, of the buffer tank; the device further comprises an exchange mechanism used for changing the positions of the four buffer tanks, the exchange mechanism is installed on the inner side of the device shell, and the exchange mechanism comprises sealing rings installed among the four buffer tanks; by means of the exchange mechanism, the water solution can be injected into the buffer tanks through the feeding connecting pipe, the positions of the four buffer tanks are adjusted, when the material openings of the buffer tanks are aligned to the discharging pipe, the water solution in the buffer tanks can be discharged downwards through the discharging pipe, feeding of waste water is achieved, and therefore the effect of continuous feeding is achieved.

The invention relates to the technical field of water treatment equipment cleaning, and discloses a hollow fiber membrane universal cleaning head track intelligent planning method and system. The method comprises the following steps: acquiring membrane bundle installation parameter information to generate three-dimensional position data of an area to be cleaned; calculating an effective cleaning range of a cleaning nozzle to determine a lap joint degree and a track interval; dividing the surface of the membrane cluster into a plurality of sub-regions and sorting the sub-regions according to the distribution density of pollutants; cleaning path coordinate points are calculated based on the effective cleaning range, the lap joint degree and the track interval parameters, and a cleaning track is determined; and converting into a motion control instruction. The membrane surface is accurately and uniformly cleaned, and the cleaning efficiency and quality are improved.

The invention provides a garment washing wastewater treatment device, and relates to the technical field of wastewater treatment.The garment washing wastewater treatment device comprises a pretreatment pool, fixing plates are symmetrically and fixedly installed at the upper end of the pretreatment pool, a fiber collecting structure is arranged between the interior of the pretreatment pool and the fixing plates, and the fiber collecting structure comprises a plurality of transmission rollers and a synchronous belt; a plurality of transmission rollers are rotatably mounted in the pretreatment tank and between the fixed plates, a fiber collecting structure is arranged, in the pretreatment tank, a synchronous belt rotating at a high speed drives part of wastewater to rotate together by virtue of a certain linear speed and surface area, and fibers doped in the wastewater are separated from each other by virtue of the fiber collecting structure; under the action of water flow coercing and centrifugal force generated by rotation of the synchronous belt, the scraping comb plate fixedly installed on the filtering structure on the surface of the synchronous belt can collect fibers, and the situation that fibers and fuzzy balls wrap flocculant molecules, the effective drug concentration is reduced, and the subsequent wastewater treatment effect is affected due to the fact that the fibers are left in wastewater is avoided.

The utility model relates to the technical field of cooling water treatment, and discloses a casting machine cooling water treatment device which comprises a water tank, a top plate is fixedly connected to the upper portion in the water tank, a filtering mechanism is arranged above the top plate, and a fixing plate is fixedly connected to the position, located on the right side of the lower portion of the top plate, in the water tank. The water tank is internally provided with a fixing plate, the fixing plate divides the interior of the water tank into two cavities, and a first refrigerator is arranged at the bottom end of the interior of the water tank and located in the cavity on the left side of the fixing plate. And the sprayed cooling water makes contact with the casting, the temperature rises to form warm water, the warm water falls into a cavity, on the right side of the fixing plate, in the water tank, the sprayed warm water is fully refrigerated and used for circulating spraying again, the cooling efficiency is improved, and the cooling effect is good.

The invention relates to a smart factory production process supervision method based on data elements, and belongs to the technical field of production data processing and analysis. According to the method, the value conditions and fluctuation conditions of various operation data under each type of equipment in a historical fault-free operation period are analyzed, and the influence of each type of operation data on the state characterization of the corresponding equipment is accurately determined; and integrating the influence of all kinds of operation data on the state representation of the corresponding equipment to obtain a fusion state coefficient capable of representing the overall state of the corresponding equipment, and constructing a threshold range corresponding to the equipment type according to the fusion state coefficient of each kind of equipment. And more accurate fault judgment of corresponding types of equipment is completed in a subsequent operation cycle, and the production supervision efficiency of water treatment products is improved.

A water treatment plant or system for the production of permeate includes a reverse osmosis stage and a permeate stage. The reverse osmosis stage can include a piping system having a supply line for process input water, a reverse osmosis pump, and a reverse osmosis tank. The reverse osmosis tank has an inlet for process input water coming from the reverse osmosis pump, a membrane, and an outlet for permeate. The permeate stage, which can have a line system forming a circuit, can include a permeate tank, a permeate pump, and a tapping point for connecting at least one consumer or user of permeate. The reverse osmosis stage and the permeate stage can be connected to one another via a connecting line in such a way that the reverse osmosis stage feeds the permeate stage with permeate. The circuit of the permeate stage can include a sterile filter.

The invention discloses sleeper surface roughness treatment equipment and a treatment method thereof, and relates to the technical field of sleeper surface treatment.The sleeper surface roughness treatment equipment is technically characterized by comprising a mounting area, a traction component is mounted on one side of the upper end of the mounting area, and a sleeper conveying component is mounted on the other side of the upper end of the mounting area; a water spraying treatment part is mounted at the upper end of the mounting area and located on the outer side of the sleeper conveying part; the water spraying treatment part comprises two mounting box bodies symmetrically mounted at the top end of the mounting area, a protective cover is mounted between the two mounting box bodies, two hydraulic rotating heads are mounted in the mounting box bodies, a rotating disc is arranged at one end of each hydraulic rotating head, and a plurality of nozzles are mounted at one end of each rotating disc; according to the design, a continuous conveying treatment mode is adopted, the surface roughness of the sleeper body is treated, and the overall production efficiency is improved.

The invention discloses a multi-class mechanical water treatment metering instrument reading method based on machine vision, and the method comprises the steps: collecting and preprocessing a video, building an instrument image database, building an instrument type recognition algorithm, and carrying out the recognition of the type of an instrument which is recognized as a pointer type instrument. The position of a pointer tip relative to two nearest scale numbers is obtained through instrument scale number recognition and pointer position recognition of the pointer type instrument, and then instrument reading is obtained through calculation after the distance proportion between the point of the pointer and the two nearest numbers is calculated. For the instrument identified as the floater type instrument, the position of the upper edge of the floater and two scale readings closest to the position are obtained through instrument scale number identification and floater position identification, and then the numerical value corresponding to the coordinate where the intersection point of the center connecting line of the two scale numbers and the upper edge of the floater is located is calculated. According to the method, the aim of automatically identifying various common mechanical instruments of the water treatment device can be fulfilled by fusing machine vision with machine learning, and the method has the advantages of high real-time performance, high universality and the like.

The invention relates to the technical field of gas diffusion layers, and discloses a preparation method and application of a crystalline porous material doped gas diffusion layer, and the preparation method comprises the following steps: S1, adding 6-9 parts by mass of carbon black, a crystalline porous material, 0.1-0.2 part by mass of a thickening agent, 2-4 parts by mass of a water repellent agent and 5-8 parts by mass of a dispersing agent into 75-85 parts by mass of a solvent, and uniformly stirring; wherein the mass ratio of the carbon black to the crystalline porous material is 1: (0.3-1.5), stirring and defoaming to obtain microporous layer slurry; and S2, coating carbon paper subjected to hydrophobic treatment with the microporous layer slurry, and then sequentially drying and sintering to obtain the gas diffusion layer. The gas diffusion layer is prepared from the crystalline porous material with a stable structure and uniform pore size, so that the gas-liquid transmission capability of the gas diffusion layer can be enhanced, the performance of the fuel cell is further improved, and the service life of the fuel cell is further prolonged.

The device is provided with a photocatalytic reaction area, a diversion area and a settling area piezoelectric photocatalytic particle hopper, a spiral rod is driven to lift piezoelectric photocatalytic particles to the upper part of a reactor by utilizing the driving effect of water flow jet flow on a spiral blade, and meanwhile, a stirring blade is driven to fully mix the particles with a wastewater solution; a piezoelectric field is generated in the piezoelectric material under the action of double external pressure of aeration and stirring to realize coupling of a photocatalytic effect and a piezoelectric effect, then photocatalytic particles are uniformly distributed in the reactor through a baffle by virtue of the rotation action of a screw rod, and the piezoelectric photocatalytic particles can be self-cleaned by hydraulic stirring, so that the photocatalytic effect is greatly improved. Therefore, the efficiency of the photocatalytic reaction and the recycling of the photocatalyst are improved. And low-cost and high-efficiency operation of the photocatalytic reactor is realized.

The invention discloses a ceramic nanofiber membrane and preparation thereof, a catalytic ceramic nanofiber membrane and preparation and application thereof. The preparation method of the ceramic nanofiber membrane comprises the following steps: (1) cleaning a particle accumulation state ceramic membrane support body; (2) spraying the mullite fiber membrane layer slurry on one surface of a supporting body for multiple times by using a spraying method, after each spraying, applying negative pressure to a membrane for a preset time, then drying, and after the last drying, forming a spraying layer on one surface of the supporting body; and (3) sintering the obtained membrane at high temperature to obtain the ceramic nanofiber membrane which is provided with a support body and a mullite fiber membrane layer which is stably attached to one surface of the support body and is of a net-shaped structure formed by staggering and stacking mullite fibers. The catalytic ceramic nanofiber membrane comprises a ceramic nanofiber membrane and a catalyst loaded on the surface of the ceramic nanofiber membrane and in membrane holes. The ceramic nanofiber membrane provided by the invention has the advantages of high porosity, high mechanical strength, high membrane flux and the like, and is beneficial to subsequent catalyst loading and application in water treatment.

An integrated energy system including a power plant is discussed herein. In some examples, the integrated energy system may include at least one nuclear reactor and electrical power generation system configured to generate steam and electricity, a water treatment plant configured to produce Sodium Hydroxide (NaOH) from salt water, a Sodium Formate (HCOONa) production plant configured to receive the Sodium Hydroxide (NaOH) to produce Sodium Formate (HCOONa), a Thermal Decomposition reactor configured to receive the Sodium Formate (HCOONa) and configured to receive at least a first portion of the steam or at least a second portion of the electricity from the power plant to indirectly heat the Thermal Decomposition reactor to produce Hydrogen (H2), Carbon Dioxide (CO2), and Carbon Monoxide (CO) from the Sodium Formate (HCOONa), and a Methanol (CH3OH) reaction chamber configured to receive the Hydrogen (H2), the Carbon Dioxide (CO2), and the Carbon Monoxide (CO) to produce Methanol (CH3OH).

The invention provides a self-adaptive adjustment method and system for steam exhaust of a steam turbine, and belongs to the technical field of steam exhaust of steam turbines. The self-adaptive adjustment method comprises the following steps: acquiring multi-dimensional data based on a sensor deployed on a steam turbine, and preprocessing the multi-dimensional data to generate a preprocessed data packet; performing feature vector extraction and weighted fusion according to the preprocessed data packet, and determining an operation mode identifier of the steam exhaust system of the steam turbine in combination with a preset state evaluation rule base; generating a hierarchical cooperative control strategy based on the identified operation mode identifier and the weighted fusion feature vector, dynamically adjusting the priority and the activation state of the hierarchical cooperative control strategy, and generating a comprehensive control instruction packet; and executing the comprehensive control instruction packet by using a multi-stage actuator, and performing execution confirmation and feedback. The purposes that the waste heat recovery amount is increased, the system back pressure fluctuation is reduced, the service life of water treatment resin is prolonged, the manual intervention frequency is reduced, and the operation and maintenance efficiency is improved are achieved.

The invention relates to the technical field of chromium-containing wastewater treatment, and discloses a chromium-containing coating waste liquid and sludge treatment and wastewater recycling system which comprises a chromium-containing waste liquid storage tank, a tail gas absorption tower, an acidification reduction tank, a neutralization tank, a sludge dewatering machine, a sludge drying machine and a spray cooling tower which are connected through pipelines, the acidification reduction tank is connected with a chemical adding control module and a reducing agent liquid preparation tank, the spray cooling tower is connected with the reducing agent liquid preparation tank through a pipeline, high-temperature cured resin is ground through the grinding pump, the problem that Cr < 6 + > is wrapped in large-particle resin and is difficult to be thoroughly reduced is avoided, and the production efficiency is improved. Meanwhile, the acidification reduction tank is connected with the tail gas absorption tower, SO2 gas released in the acidification process is absorbed, direct emission is avoided, the spray cooling tower and the sludge dewatering machine are connected with the sludge drying machine, and hot steam generated by the sludge drying machine can be subjected to spray cooling through filtrate of the sludge dewatering machine; and meanwhile, the mixed filtrate is recycled.

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of water treatment. When the water treatment filtering material is prepared, polyacrylonitrile reacts with sodium azide to prepare graft modified polyacrylonitrile; alkali lignin is subjected to chloroethylation, and chlorinated modified lignin is prepared; the preparation method comprises the following steps: hydrolyzing tetrabutyl titanate, doping nickel and iron elements, and growing on a graphene nanosheet in situ to prepare modified titanium dioxide loaded graphene; modifying the graphene loaded with the modified titanium dioxide by using a silane coupling agent to prepare modified graphene; reacting the casting membrane base solution with the modified graphene and potassium carbonate to prepare a casting membrane solution A; reacting the membrane casting base solution with chlorinated modified lignin and polyethyleneimine to prepare a membrane casting solution B; and mixing the membrane casting solution A and the membrane casting solution B, and scraping into a membrane to prepare the water treatment filtering material. The water treatment filtering material prepared by the invention has the advantages of hydrophilicity, oil stain resistance, self-cleaning property, antibacterial property and good filtering property.