336 results about "Fouling" patented technology

A pneumatically controlled aquaculture apparatus is provided. The apparatus has a lift vessel that lifts containers holding shellfish out of the water when the lift vessel is floating in order to allow air desiccation to prevent bio-fouling of the equipment and shellfish. The apparatus has a floatation control tank positioned above the containers holding shellfish in a centered position of the apparatus. The apparatus also has a suspension buoy for suspending the apparatus in the water column. The apparatus may be deployed in two different suspended positions with either the floatation control tank or the suspension buoy floating on the water surface and the containers holding shellfish suspended below the surface. The apparatus may also be deployed in a submerged position in which the apparatus is resting on the water bottom.

The invention relates to the technical field of water treatment, and provides a reverse osmosis membrane cleaning method, a cleaning agent composition and application. According to the method, whether cleaning is needed or not is determined by comparing initial operation parameters and current operation parameters of a system; the pollutant type is accurately judged by observing the appearance characteristics of the membrane surface and detecting related index parameters; and selecting a corresponding cleaning agent formula according to the pollutant type, and sequentially performing physical washing and chemical cleaning. The cleaning agent composition comprises a biological pollution cleaning agent, an organic pollution cleaning agent and / or an inorganic scaling cleaning agent. By establishing a scientific pollution diagnosis system and a targeted cleaning strategy, the problems of fixed cleaning scheme and low pertinence in the prior art are solved, the pressure difference recovery rate after cleaning can reach 90% or above, the desalination rate recovery rate can reach 99% or above, the cleaning efficiency is remarkably improved, the operation cost is reduced, and the service life of the membrane is prolonged.

The present invention discloses a method for synergistically preparing a superhydrophobic membrane by spray-induced nonsolvent phase inversion and click chemistry. The method uses a polymer with a polyvinylidene fluoride as the main structure as a raw material, constructs a micro-nano hierarchical structure in bulk by the spray-induced nonsolvent phase inversion method, and covalently bonds a low surface energy substance to the membrane surface with the assistance of click chemistry technology to achieve the superhydrophobicity of the membrane. The superhydrophobic membrane of the present invention can resist the wetting of liquids with different surface tensions, has good anti-wetting and anti-inorganic fouling properties as well as excellent wastewater treatment capabilities, and can be applied to fields such as membrane distillation seawater desalination, deep treatment of shale gas wastewater and clean water regeneration, etc., broadening the types and application ranges of MD membrane materials.

The invention relates to the technical field of biological fouling prevention and treatment of water delivery pipelines, in particular to a multi-channel array ultraviolet advanced oxidation viscapula fouling prevention and treatment device for a water delivery pipeline, which comprises a front double-channel basket type filter used for filtering adult viscapula in a target risk pipeline in a single channel and switching to a standby channel when blockage reaches a limit value; the array ultraviolet water distribution pipe is used for distributing water flow in a balanced manner to prolong the total killing duration; the oxidant auxiliary cleaning module is used for feeding an environment-friendly medicament; the array ultraviolet killing tube is used for directly killing larvae and adult shellfishes of the macrobrachium nipponense through ultraviolet rays, and removing the larvae and byssus proteins of the macrobrachium nipponense attached to the tube through an ultraviolet activation environment-friendly medicament; the numerical control system is used for controlling the flow speed of the ultraviolet water distribution pipe, starting and stopping of the ultraviolet killing pipe and the putting amount of the oxidant auxiliary cleaning module. Therefore, the problem that it is difficult to conduct comprehensive, efficient, non-stop maintenance and environment-friendly confined water prevention and treatment on fouling of larvae and adult shellfish of macrobrachium fortunei in a water conveying pipeline through an existing method is solved.

The invention discloses a groundwater dynamic monitoring well pattern optimization method based on fouling and risk partitions. The method comprises the following steps: determining a hydrogeological background and groundwater function partitions of a to-be-optimized region; analyzing the fouling property according to the hydrogeological background, and obtaining a fouling property grade; obtaining a groundwater protection urgency level according to the fouling level and the groundwater function partition; determining an existing monitoring well in a to-be-optimized area and sampling, and analyzing the water quality principal component to obtain the water quality principal component of underground water in the to-be-optimized area; the underground water pollution degree is obtained; according to the groundwater pollution degree and the groundwater protection urgency level, obtaining a groundwater pollution risk level; and according to the groundwater pollution risk level, dynamically monitoring the to-be-optimized area, and optimizing the monitoring well pattern. According to the invention, dynamic adjustment and optimization are carried out according to the pollution degree of the underground water, so that the new underground water dynamic monitoring well pattern can obtain enough amount of underground water information data with higher precision under the precondition of using less manpower and material resources.

The invention discloses a calculation method and a calculation device for a film state boiling starting point of a surface with dirt, and belongs to the field of nuclear power. The calculation method for the membrane state boiling starting point of the surface with the dirt comprises the following steps: establishing a fuel rod cladding surface heat exchange model with the dirt according to a fuel rod cladding model with the dirt and thermal parameters, and calculating to obtain a heat conductivity coefficient and permeability of a dirt area; calculating the gas film thickness at the beginning of film boiling; according to the pressure balance and energy conservation equation, the heat flux corresponding to the minimum gas film thickness value is obtained through calculation and serves as the initial heat flux of film boiling. The method can accurately calculate the initial heat flux density of membrane boiling under the influence of dirt, and improves the precision of systematically analyzing the influence of dirt on the thermal hydraulic performance of a reactor.

The invention provides a composite acrylic acid low-surface-energy antifouling coating, a preparation method and application, and belongs to the technical field of marine antifouling materials, the composite acrylic acid low-surface-energy antifouling coating comprises a three-layer composite structure, the three-layer composite structure comprises a bottom layer, a middle layer and a surface layer from bottom to top, the bottom layer is capsaicin-loaded polymethyl methacrylate, and the middle layer is a polymethyl methacrylate surface layer. The bottom layer is made of capsaicin, the middle layer is made of pressure-sensitive adhesive activated by oxygen plasma, the surface layer is made of dihydroxyl-terminated polydimethylsiloxane, the mass ratio of the bottom layer to the middle layer to the surface layer is (23-25): 1: (23-25), and the mass content of capsaicin in the bottom layer accounts for 5.82-5.75% of the total mass; based on the bonding strength change of the pressure-sensitive adhesive generated by oxygen plasma jet and the capsaicin for effectively inhibiting biological growth, polyacrylic acid is used as a self-polishing reservoir to continuously release an environment-friendly antifouling agent; the pressure-sensitive adhesive adheres to the polydimethylsiloxane layer through the adhesive force change generated by oxygen plasma to achieve the low-surface-energy antifouling effect, synergistic gain is achieved, the composite material intervenes into the biological fouling process from multiple aspects, and the composite material copes with the marine biological fouling process jointly.

The invention relates to the technical field of thermal power generation, in particular to a direct air cooling condenser fouling thermal resistance estimation method combined with a scaling mechanism, and aims to realize stable and accurate real-time estimation of the fouling thermal resistance of a condenser. The method includes the steps that operation parameters of the direct air cooling unit are collected and preprocessed to form a continuous time sequence; calculating multiple groups of cleaning total heat transfer coefficients based on the cleaning period operation parameters, training a machine learning model based on the cleaning total heat transfer coefficients, and establishing a cleaning heat transfer coefficient reference model; calculating an actual total heat transfer coefficient based on the current operation parameters, inputting the reference model to obtain a corresponding cleaning coefficient, and calculating initial fouling thermal resistance according to the cleaning coefficient; and establishing a discrete linear recursion physical filtering model based on a dirt deposition-denudation mechanism, identifying model parameters on line by taking the initial dirt thermal resistance as an observed quantity, performing physical constraint filtering on the model parameters, and outputting a final dirt thermal resistance online estimated value.

The invention relates to the technical field of oil field yield increase and transformation, in particular to environment-friendly biological blockage removal liquid and application thereof, and aims to solve the problem that a current biological blockage removal product can only remove organic blockage. The environment-friendly biological unblocking liquid provided by the invention is prepared from the following components in percentage by mass: 2-5% of biological enzyme, 1-5% of surfactant, 1-5% of pH (Potential of Hydrogen) regulator and the balance of water. 1%-3% of a biological enzyme stabilizer; 3-5% of a chelating agent; 0.5%-1% of a surfactant; 0.5%-1% of a dispersion suspending agent; and the balance of water. The biological blockage removal liquid provided by the invention can effectively remove organic blockage of a stratum caused by wax and asphaltene precipitates, so that crude oil is released from the surfaces of rock particles, the flowing of the crude oil in pores of the stratum is improved by changing the wetting state of rock, and inorganic blockage is removed through permeation dispersion and chelation solubilization effects, so that the mechanical property of the stratum is improved. Mixed scales formed by mutual deposition of inorganic scales and organic matters (wax and asphaltene) are effectively removed, and the requirement for plugging removal of a complex scaling reservoir of an oil well is met.

The invention provides a cooling tower cleaning period decision-making method based on filler layer resistance characteristic online identification, which comprises the following steps: acquiring multi-dimensional time sequence data such as differential pressure, water temperature, conductivity, turbidity and microbial concentration based on a multi-source sensor, and constructing a structured trend characteristic matrix through time synchronization, abnormal value elimination and statistical characteristic extraction; in combination with expert knowledge, constructing a multi-modal combined pollution knowledge graph, and learning pollution factor interaction weights by using a graph neural network to realize causal reasoning of combined pollution mechanisms such as scaling, biological slime and the like; according to the method, an abnormal causal chain path is efficiently matched in a knowledge graph by adopting improved A * search, causes and evolution stages are output, automatic attribution and intelligent cleaning suggestion optimization are realized, and the resistance abnormity diagnosis accuracy and the adaptability of a cleaning strategy are improved by continuously feeding back diagnosis results and dynamically expanding a knowledge graph structure.

The invention relates to the technical field of biological blockage risk assessment, and discloses a nuclear power cooling water system biological blockage risk assessment method and device, and the method comprises the steps: 1, collecting underwater image information, carrying out the recognition of the underwater image information, and carrying out the recognition of the biological types and the corresponding number in the underwater image information; 2, collecting the liquid level and the water flow speed of the position of the drum net and the pulling force borne by the trash holding net; 3, pre-estimated blockage risk analysis is carried out on the basis of the species and number of organisms in the underwater image information identified at different position points and time points, and a first blockage risk result is obtained; a predicted trash holding net stress curve is obtained based on the liquid level of the drum net position and the water flow speed collected within a period of time, the predicted trash holding net stress curve and the tensile force borne by the trash holding net collected within the period of time are compared and analyzed, and a second blocking risk result is obtained according to the comparison and analysis result; and evaluating the biological clogging risk according to the first clogging risk result and the second clogging risk result.

The invention discloses a detoxification system for washed household garbage incineration fly ash, and belongs to the technical field of hazardous waste treatment. Comprising a fly ash temporary-storage tempering unit, a low-temperature anti-sticking drying unit, a temperature-control anti-scaling pyrolysis unit and a gas-solid separation unit which are connected in sequence. The fly ash caching and tempering unit is provided with a calcium salt content online detector and an anti-caking agent adding device, so that accurate tempering is realized; the low-temperature anti-sticking drying unit realizes low-temperature anti-sticking drying; the temperature-control anti-scaling pyrolysis unit adopts an indirect heating type rotary kiln and is provided with a plasma catalysis assembly, so that medium-temperature degradation of dioxin and scaling prevention are realized; the gas-solid separation unit comprises an efficient cyclone separator, a high-temperature ceramic dust remover and a water-cooled conveyor, and efficient separation and cooling are achieved. Through systematic structural design and integration, the technical problems that the calcium salt-containing fly ash after water washing is prone to caking and scaling in the treatment process, and dioxin degradation is not thorough are effectively solved.

The utility model relates to a low-concentration organic wastewater recovery treatment system which is provided with a pretreatment part, a biological activated carbon treatment part, a self-cleaning filter treatment part, an ultrafiltration treatment part and a reverse osmosis treatment part which are communicated through pipelines according to a treatment flow, wherein the pretreatment part is provided with an air flotation device, the biological activated carbon treatment part is internally provided with a ferrous iron doser, and the ultrafiltration treatment part is internally provided with a charge neutralizer doser; part of particulate matters in the wastewater are removed through the air flotation device, so that the pollution and blockage risk of subsequent equipment is reduced; through ferrous ions released in water, the activity of microorganisms in water and sufficient reaction of organic matters can be promoted, so that polar substances are passivated; the charge neutralizer is released in water, so that the adhesion of polar substances to the ultrafiltration membrane can be reduced, and the service life of the ultrafiltration membrane is prolonged.

The invention relates to a reverse osmosis membrane pollution control method based on green biological scale inhibition, which is especially suitable for reverse osmosis membrane pollution treatment in an industrial wastewater zero discharge system. The method comprises the following steps: regulating and controlling the composition of organic components of inlet water through a sand filtration pretreatment unit, and directly interfering the nucleation and crystallization processes of inorganic scaling on a membrane surface by utilizing naturally enriched microbial communities and extracellular polymeric substances thereof in a sand filtration process without adding a fungicide or a chemical scale inhibitor, so as to form a loose and reversible pollution layer structure. The method effectively reduces the scaling rate of inorganic salts such as calcium carbonate and the like, inhibits membrane surface biological pollution, delays compaction of a pollution layer, improves the membrane flux retention rate, prolongs the membrane operation cycle and reduces the cleaning frequency. Compared with an existing traditional physical or chemical pretreatment method, the natural scale inhibition effect of an ecological system in the sand filtration unit is fully utilized, and the method has the remarkable advantages of being low in operation cost, environmentally friendly, high in adaptability and the like.

The invention discloses a modularized regulation and storage tunnel and ecological landscape integrated system, which relates to the technical field of ecological water conservancy projects and comprises a regulation and storage tunnel module, an ecological landscape module and an intelligent regulation and control module, the regulation and storage tunnel module comprises an electroactive biological membrane-plant root system coupling reactor and an intelligent secretion capture-slow release module and is used for realizing regulation and storage of water and treatment of heavy metal ion pollutants; according to the method, the problem of bioelectrochemical coupling failure of a microorganism-plant interface is solved through construction of an artificial electron transfer path, intelligent regulation and control of the phenol concentration and multi-field coupling simulation, the heavy metal ion removal rate is stably increased, pipeline scaling is reduced, and traditional monitoring and model limitation is broken through; meanwhile, by means of ecological module collaboration, the biological diversity and the system stability are enhanced, the operation and maintenance cost is reduced, the service life of materials is prolonged, and a new interdisciplinary precise regulation and control solution is provided for urban water environment treatment.

The utility model discloses a gas distributor scaling cleaning system, which relates to the technical field of biological fermentation, and comprises a configuration tank, a fermentation tank, a gas distributor, a cleaning liquid inlet pipe and a cleaning liquid return pipe, the configuration tank is used for accommodating cleaning liquid, the configuration tank is provided with a cleaning liquid outlet and a cleaning liquid return port, the gas distributor is arranged in the fermentation tank, and the gas distributor is arranged in the fermentation tank. The gas distributor is provided with a gas inlet, one end of the cleaning liquid inlet pipe is communicated with the cleaning liquid outlet, the other end of the cleaning liquid inlet pipe is communicated with the gas inlet, the cleaning liquid inlet pipe conveys cleaning liquid in the preparation tank to the gas distributor, one end of the cleaning liquid return pipe is communicated with the cleaning liquid return port, and the other end of the cleaning liquid return pipe is communicated with the liquid outlet of the fermentation tank. And the cleaning liquid return pipe conveys the cleaning liquid in the tank cavity of the fermentation tank to the preparation tank. According to the system, the gas distributor in the fermentation tank is cleaned, the gas-liquid mass transfer effect can be enhanced, the pressure drop at the gas distributor is reduced, the energy consumption of a compressor connected with the gas distributor is reduced, and the effects of saving energy and improving efficiency are achieved.

The invention provides a ship underwater fouling organism image enhancement and intelligent identification collaborative optimization method, which comprises the following steps of: acquiring ship bottom initial three-dimensional point cloud data based on a three-dimensional reconstruction sensor, constructing and dynamically updating a ship bottom curved surface three-dimensional model and contour data, and planning and adaptively adjusting a scanning track according to the ship bottom curved surface three-dimensional model and the contour data; detecting the turbidity of a water area in real time, switching a multi-mode illumination mode, synchronously collecting an image, enhancing the image by adopting a matching algorithm, and outputting the enhanced image; and carrying out registration association on the enhanced image and the three-dimensional contour data of the ship bottom, training an intelligent identification model by using fused multi-modal data, and realizing fouling type classification and coverage area classification. According to the method, a track is dynamically adjusted to adapt to a complex ship bottom, illumination and an enhancement algorithm are switched according to turbidity to ensure image quality, multi-modal features are fused to improve recognition precision, efficient classification and grading are achieved by means of an intelligent model, and manual errors are reduced.

The invention relates to the field of garbage treatment equipment, in particular to biological medium type oil stain separation sewage treatment equipment which structurally comprises a machine body, a garbage processor is mounted in the machine body, a discharging groove is further formed in the side edge of the machine body and connected with the discharging end of the garbage processor, and a stirring bin is arranged at the top of the machine body; the stirring bin comprises a bin body, a plurality of sets of rotatable stirring shafts are arranged in the bin body, bottom grooves are formed in the bottom of the bin body, a rotatable conveying belt is installed between the bottom grooves, a driving roller of the conveying belt penetrates through the side edge of the bin body, and the conveying belt rotates in the axial direction of the driving roller. When the conveying belt downwards moves and rotates towards one side of the auxiliary side plate, a cavity is formed between the surface of the conveying belt and the auxiliary side plate so that the biological balls needing to be cleaned can be concentrated, the biological balls can be turned over under rotary conveying of the belt body, and a better cleaning effect can be achieved under washing of a jet flow device; and peculiar smell caused by biological ball blockage is avoided.

The invention discloses a dirt detection and treatment system for a sea drainage pipeline. The dirt detection and treatment system comprises a detection device and a dosing device, according to the detection device, the type and content of dirt are analyzed through a Fourier infrared spectrometer, the agent release amount of the agent adding device is adjusted in real time through an electromagnetic valve according to the result, and accurate agent release is achieved. The dirt detection and treatment system disclosed by the invention can accurately detect the scaling and corrosion states of a pipeline in real time and accurately control the addition amount of an upstream scale inhibitor and a bactericide, so that marine pollution caused by abuse of chemicals is greatly reduced, and an efficient, environment-friendly and real-time automatic pipeline dirt solution is realized.

The present invention provides biosurfactants and uses thereof for, for example, effective removal of contaminants and / or fouling species (e.g., paints, molds, and algae) on porous surfaces, and / or enhanced cleaning of contaminants on non-porous surfaces.

The invention provides a composite polyurethane film capable of preventing fouling and adsorbing bivalent copper ions in seawater and a preparation method and application thereof.The method comprises the steps that firstly, polyurethane is prepared through a high-molecular organic polymerization reaction, and a tannic acid / collagen compound is used for modifying the polyurethane; the adsorption performance of the original polyurethane is improved, and meanwhile, the antifouling function is given to the polyurethane. Besides, tannic acid is poor in stability in water and easy to dissolve in water, however, tannic acid and collagen are co-precipitated in water, and then the precipitate is grafted to polyurethane, so that the problem of water stability of tannic acid is solved, and meanwhile, because collagen is rich in amino groups, adsorption of bivalent copper ions can be further improved. The preparation method has the advantages that the operation is simple and convenient, the production efficiency is high, the raw materials are easy to obtain and the like, a feasible technical route is provided for industrial production, and a new thought and a new method are provided for reducing the concentration of bivalent copper ions in a marine environment and reducing marine biofouling.

The invention belongs to the technical field of coatings, and discloses a preparation method of a photocatalytic marine antifouling coating, which comprises the following steps: mixing urea, ferric oxide and water, uniformly stirring, drying and calcining; mixing the obtained oxide drug with aniline, sodium dodecyl benzene sulfonate and water, and uniformly stirring; and adding an ammonium persulfate aqueous solution, alternately washing the material with water and absolute ethyl alcohol by virtue of refrigeration, freeze-drying to obtain a brown solid, grinding into powder, and finally uniformly mixing the obtained catalyst powder with a conventional hull paint coating in proportion to obtain a final product. The photocatalytic marine antifouling paint provided by the invention utilizes the catalytic oxidation capacity of active free radicals in a photocatalytic material. Electrons are excited through illumination to form electron-hole pairs, and further react with water and oxygen on the surface of the material to generate active oxygen species such as hydroxyl free radicals and the like. As the active oxygen species have strong oxidizing property, marine microorganisms can be effectively prevented from being attached and causing fouling.

The application provides a solid super-smooth surface and a construction method and application thereof, and relates to the technical field of marine antifouling. The solid super-smooth surface constructed by the application is composed of linear polyfluorosiloxane, the linear polyfluorosiloxane is combined with a substrate through a chemical covalent bond, the chemical covalent bond is firm, the problem that traditional biomimetic super-smooth surface lubricating oil is prone to loss in an underwater environment is solved, and the solid super-smooth surface has a longer performance of preventing and treating biological fouling. The solid super-smooth surface provided by the application has a linear structure and reliable underwater transparency, and the underwater visible light transmittance of the material can reach more than 95%.

The invention relates to the technical field of membrane scale inhibitor performance testing, in particular to a membrane scale inhibitor performance dynamic testing method and system. The operation condition of the same section of membrane element is simulated in the mode that multiple circulation periods are carried out, membrane inlet water is concentrated step by step, the frequency of a high-pressure plunger pump is reduced step by step along with the increase of the number of circulation periods so as to reduce the water inlet flow of a membrane assembly, and the recovery rate of the membrane assembly is synchronously adjusted to a proper set value in each circulation period; by monitoring turbidity data of an online turbidity meter on the membrane concentrated water side, when the turbidity of the concentrated water suddenly and abnormally rises, the scaling phenomenon can be judged to occur, a test end point is reached, and the periodic concentration cycle operation is ended. The technical problems that in the prior art, the actual membrane system operation condition cannot be simulated, the operation condition is greatly different from the actual scaling process, the experiment end point and the evaluation result are easily influenced by ion measurement errors, the operation is complex, the operation intensity is large, the reagent consumption and cost are high, and the test time is long are solved.

The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method for treating high-sulfonic-group wastewater by advanced oxidation, which comprises the following steps: regulating the pH value of the wastewater to 3.0-4.0, then carrying out photo-Fenton oxidation, controlling the molar ratio of H2O2 to Fe < 2 + > to be 300: 1-400: 1, regulating the pH value of the effluent to 5.0-6.0, adding sodium sulfite to quench residual H2O2 and flocculate and precipitate iron mud, and finally, carrying out secondary oxidation on the wastewater to obtain the high-sulfonic-group wastewater. Performing anaerobic-aerobic biochemical treatment on the supernate, adding sodium carbonate and sodium hydroxide into biochemical effluent to soften and descale, concentrating in a mechanical vapor recompression evaporator, washing and recrystallizing crystallized mother liquor, and adsorbing and purifying the crystallized mother liquor with activated carbon to obtain an industrial salt product. The problem of MVR evaporation scaling is effectively solved by accurately controlling the neutralization pH and combining the softening step, finally, wastewater standard treatment and salt high-quality recovery are achieved, the COD removal rate can reach 95% or above, and excellent environmental and economic benefits are achieved.

The application discloses an electrolyte analyzer maintenance liquid and a preparation method thereof. The maintenance liquid comprises cleaning components, electrode protection components, a buffer system, a preservative and a solvent. The cleaning components comprise a decomposition enzyme and a chelating agent, and the electrode protection components comprise inorganic salts, stabilizers and protective agents. Through the synergistic effect of the cleaning components, the electrode protection components, the buffer system and the preservative, the dual effects of cleaning and electrode protection of the electrolyte analyzer flow path can be simultaneously achieved. The decomposition enzyme in the cleaning components can decompose biological pollutants on the flow path and the electrode surface, the chelating agent can chelate metal ions, dissolve metal salt deposits and prevent inorganic salt fouling. The electrode protection components can maintain the stable potential of the electrode after the cleaning components remove the pollutants, prevent the electrode potential from drifting and prolong the service life of the electrode. The electrolyte analyzer maintenance liquid is mild and non-corrosive, avoids damaging the electrode sensitive film, is safe and environmentally friendly, does not release heavy metals and is easy to produce and prepare.

The invention provides an online monitoring method, device and equipment for heat exchanger dirt, and relates to the field of heat exchangers. The problem that the gathering condition of dirt in the heat exchanger cannot be monitored online in real time in the prior art is solved. The detection method comprises the steps that current operation parameters of a target heat exchanger are obtained; determining the current dirt resistance value of the target heat exchanger according to the current operation parameters and the equipment parameters of the target heat exchanger; the current heat exchange coefficient of the target heat exchanger is determined according to the current dirt resistance value and the initial heat exchange coefficient of the target heat exchanger; and according to the current heat exchange coefficient of the target heat exchanger, a dirt detection result of the target heat exchanger is determined, and the dirt detection result is output and displayed. According to the scheme, real-time detection of dirt in the heat exchanger and real-time monitoring of the heat exchange efficiency of the heat exchanger are achieved, the heat exchange efficiency of the heat exchanger is improved, and the maintenance cost of the heat exchanger is reduced.

The invention belongs to the technical field of marine corrosion and protection, and discloses an antibacterial peptide for marine corrosion prevention and fouling prevention and application of the antibacterial peptide, the sequence of the antibacterial peptide is H-NIle-NVal-NLys-NLU-NPhe-NLU-NTyr-NArg-NSer-NTrp-NLU-NHis-NLU-NLU-NIle-NH2, the antibacterial and preservative effects of common corrosion inhibition bactericides such as quaternary ammonium salts, organic guanidines and aldehydes can be effectively enhanced, and the antibacterial peptide can be applied to marine corrosion prevention and fouling prevention. The generation of a corrosive biological membrane and the microbial corrosion rate can be effectively inhibited, the dosage of a bactericide can be reduced by 60% or above, and continuous antibacterial and anticorrosion for 30 days can be realized.

The present invention provides potent antibiofilm and antifouling compounds albofungin and derivatives thereof isolated from Streptomyces chrestomyceticus BCC 24770, the construction of high-yield strains for albofungin production, and application of albofungin-based copolymer coatings to object or surfaces, particularly to inhibit fouling by marine organisms using hydrolysable and degradable antifouling coatings incorporated with albofungins.

The embodiment of the present application discloses a control method of a water purification system with cleaning and disinfecting functions, which determines the working procedure of the water purification system; the working procedure includes pure water preparation and cleaning and disinfecting; when the pure water is prepared, the waterway pipeline of the water supply module and the water preparation module is connected, and the wastewater discharge pipeline of the sewage module and the water preparation module is connected; the water preparation module is controlled to prepare pure water; when the cleaning and disinfecting is performed, the cleaning and disinfecting module is controlled to prepare an oxidizing solution; the waterway pipeline of the cleaning and disinfecting module and the water preparation module is connected, and the wastewater discharge pipeline of the sewage module and the water preparation module is connected; the oxidizing solution is controlled to clean the waterway pipeline of the water preparation module and the wastewater discharge unit discharges the used oxidizing solution. The water purification system can improve the problem of odor caused by bacteria breeding during use and storage, remove the pollutants such as scale and biological membrane formed on the surface of the RO membrane filter element, and thus prolong the service life of the water purification system.