70 results about "Sodium hypochlorite" patented technology

The application discloses a kind of synthesis methods of high-purity electronic grade sodium hypophosphite, dilute phosphine gas is passed into to the mixed solution of sodium hypochlorite and sodium hydroxide that has been pre-cooled with sufficient stirring, and sodium hydroxide is added to carry out reaction;After reaction is completed, filtration, concentration, crystallization, separation are carried out, and the obtained product is purified by resin to obtain high-purity electronic grade sodium hypophosphite product.Compared with the traditional "yellow phosphorus-lime-soda" oxidation-reduction method for preparing industrial grade product and then preparing high-purity electronic grade sodium hypophosphite, the product purification difficulty of the application is low, by using 7N grade ultra-high purity phosphine without any metal impurities, the problem that arsenic, silicon, germanium, nickel, chromium and other metal impurities cannot be completely removed by traditional process can be effectively solved.In addition, the application also has the advantages of effectively solving the problem of three wastes, high recycling rate of by-products, high economy and the like.

The present application belongs to the field of environmental functional materials and water treatment technology, and aims to provide a preparation method of ceramic membrane based on endogenous pore forming and catalysis of sludge containing algae. The method comprises the following steps: taking dewatered sludge of water supply plant in algae outbreak period of water source, drying, ball milling and sieving to obtain sludge powder; soaking and washing after using organic acid with complexing ability as heavy metal removal agent, pre-carbonization treatment, dry pressing into embryo, sintering into membrane sheet; primary activation treatment in weak oxidizing strong acid, washing and heating treatment for secondary activation to obtain ultrafiltration ceramic membrane product. The method is simple in operation steps, easy to implement and green and environmental protection; the prepared ceramic membrane has good separation performance and high mechanical strength, can catalyze oxidizing agent commonly used in water treatment while filtering, and free radicals are generated by decomposition to degrade organic matter; or catalyze common cleaning agent sodium hypochlorite during membrane cleaning to generate free radicals to strengthen the cleaning effect.

This invention discloses a method for improving the resistance to postharvest black spot disease in sweet potato tubers and maintaining their quality, belonging to the field of postharvest preservation technology for agricultural products. The method includes: selecting undamaged sweet potato tubers for callus treatment at room temperature for 48 hours, disinfecting with 1% sodium hypochlorite, rinsing with sterile water and air-drying, then soaking them in a 9.0 mmol / L benzothiadiazole (BTH) solution (containing 0.05% Tween 80) at room temperature for 60 minutes, removing them and air-drying them to complete the treatment. This invention induces the activation of the sweet potato tuber's own defense system through BTH, increasing the activity of key enzymes in phenylpropane metabolism, chitinase and other disease-resistant enzymes, promoting the accumulation of total phenols and lignin, maintaining cell membrane integrity, inhibiting starch degradation and abnormal increase in soluble sugars. Under storage conditions of 28±1℃ and 80-85%RH, it can significantly inhibit the expansion of black spot disease lesions and extend the storage period to more than 25 days. This method has no pesticide residues, is unlikely to cause pathogen resistance, is environmentally friendly, simple to operate, and cost-controllable, and is suitable for large-scale postharvest preservation of sweet potato tubers.

The application belongs to the field of organic synthesis, and discloses a preparation method of 1-amino cyclobutanecarboxylic acid, which comprises the following steps: S1. 1-cyanocyclobutyl carboxylic acid ethyl ester is reacted under acidic conditions to obtain 1-formylaminocyclobutane carboxylic acid ethyl ester; S2. 1-formylaminocyclobutane carboxylic acid ethyl ester is reacted under the action of sodium hypochlorite to obtain 1-amino cyclobutanecarboxylic acid ethyl ester; S3. 1-amino cyclobutanecarboxylic acid ethyl ester is reacted under the action of a base catalyst and di-tert-butyl dicarbonate to obtain BOC-1-amino cyclobutane carboxylic acid ethyl ester; and S4. BOC-1-amino cyclobutane carboxylic acid ethyl ester is reacted under the action of an acid catalyst to obtain 1-amino cyclobutanecarboxylic acid. The product obtained by the preparation method is pure, has no inorganic salt residue, and is simple to operate, low in cost and suitable for industrialized production.

The invention discloses a method for preparing a cobaltous sulfate solution and cobaltous sulfate crystals by using cobalt-containing solid raw materials, which comprises the following steps of: carrying out slurrying pretreatment on the cobalt-containing solid raw materials such as cobalt concentrate, cobalt slag or waste lithium battery positive electrode materials and the like as starting materials; through continuous operation of multi-stage dissolution and multi-stage iron removal (an oxygen and sodium carbonate iron removal system is adopted to replace a traditional sodium hypochlorite and sodium carbonate iron removal system), the cobalt leaching rate is larger than or equal to 97%; subsequently, P204 extraction and impurity removal, P507 nickel-cobalt separation, oil removal and purification are carried out, and a high-quality cobalt sulfate solution is obtained; the solution can be directly supplied to a ternary product production line in a short distance (less than or equal to 8km), or through MVR evaporation concentration, Olso cooling crystallization, centrifugal separation and drying, cobalt sulfate crystals suitable for long-distance transportation are obtained. Meanwhile, MVR evaporation condensate water and high-impurity centrifugal mother liquor are returned to be used for preparing reverse extraction acid needed by P507 extraction, dryer steam condensate water is returned to be used for heating of the slurrying procedure, cyclic utilization of water resources and energy in the whole process is achieved, and the method is suitable for industrial production of high-quality cobalt sulfate products.

This utility model relates to the field of sodium hypochlorite production technology and discloses a sodium hypochlorite production system, including a feeding unit, an electrolysis unit, and a storage unit. The feeding unit includes a softening section, a heat exchange section, and a salt dissolving section. The softening section generates softened water. The heat exchange section and the salt dissolving section are connected in parallel on one side of the softening section. The heat exchange section is used to regulate the temperature of the softened water to generate dilution water. The salt dissolving section is used to dissolve the softened water and salt to obtain brine. The electrolysis unit includes a dilution tank and an electrolytic cell. The dilution tank is used to mix and dilute the dilution water and the brine to obtain diluted brine. The electrolytic cell is used to electrolyze the diluted brine to generate sodium hypochlorite. The storage unit is used to store the sodium hypochlorite generated by the electrolysis unit. This utility model has the beneficial effect of high sodium hypochlorite production efficiency.

The application relates to a safe treatment device for phosphorus-containing and arsenic-containing waste liquid, which comprises a crushing mechanism for containing the phosphorus-containing and arsenic-containing waste liquid and crushing solid matters in the waste liquid; a first closed reaction container for receiving the waste liquid from the crushing mechanism; an oxidation mechanism comprising a sodium hypochlorite storage tank one and a sodium hydroxide storage tank two; a second closed reaction container for receiving the waste liquid from the first closed reaction container; and a precipitation mechanism comprising a calcium chloride storage tank three, a lime milk storage tank four, a ferric chloride storage tank five and a polyaluminum chloride storage tank six. The application can effectively treat elemental phosphorus and simultaneously dispose of the arsenic-containing waste liquid, solves the problem that the prior art lacks a device for simultaneously and safely treating the phosphorus-containing and arsenic-containing waste liquid, reduces equipment investment and operation cost, and improves the treatment efficiency.

This invention discloses an antibacterial air filter material and its preparation method, relating to the field of filter material technology. In preparing the antibacterial air filter material, terephthalaldehyde is reacted sequentially with 2-aminobenzimidazole and diethyl phosphite to obtain a phosphorus-nitrogen composite flame retardant; silica is reacted sequentially with γ-glycidyl etheroxypropyltrimethoxysilane and 1-hydroxymethyl-5,5-dimethylhydantoin to obtain modified silica; the modified silica is chlorinated with sodium hypochlorite to obtain haloaminated silica; 70-80 parts of polyacrylonitrile, 5-6 parts of the phosphorus-nitrogen composite flame retardant, and 3-4 parts of haloaminated silica are formulated into a spinning solution, and electrospinned to obtain a polyacrylonitrile fiber membrane; the polyacrylonitrile fiber membrane is reacted sequentially with ethylenediamine and curcumin to obtain the antibacterial air filter material. The antibacterial air filter material prepared by this invention has the advantages of both antibacterial and flame retardant properties.

The utility model provides a kind of water plant sodium hypochlorite stock solution automatic dilution system, including sodium hypochlorite stock solution bucket, venturi water jet, dilution bucket, liquid level sensor, electric valve and water level control module.System uses venturi water jet principle, with water pressure as power to add stock solution, replace traditional chemical pump, solve low temperature crystallization jam problem;Water level control module automatically controls electric valve action according to liquid level sensor data, realizes stock solution and clean water according to proportion dilution, without manual intervention;Through valve interlock, time delay judgment, low liquid level alarm and anti-overflow protection etc. Design, improve dilution precision and system safety.The utility model is applicable to automatic dilution of sodium hypochlorite of waterworks, reduces the cost of using people, improves disinfection process stability.

The application discloses a preparation method of modified manganese sand based on phosphate bridging. Phosphate ions are used as a bridge to form stable covalent bonding with hydroxyl groups on the surface of manganese sand. Iron species are firmly fixed on the surface of the carrier in the form of chemical bonding through the action of phosphate bridging to construct stable Fe-Mn bimetallic active centers. The dissolution rate of iron ions is greatly reduced, the service life of the catalyst is prolonged, and secondary pollution caused by the loss of metal ions is avoided. The application scene of manganese sand is expanded from the traditional removal of iron and manganese in underground water to rainwater treatment, advanced treatment of tail water in sewage plants, treatment of refractory organic wastewater and other fields, and is especially suitable for advanced treatment of industrial wastewater with complex components. Through the Fe-Mn bimetallic active center, the decomposition path of sodium hypochlorite is changed, and high-valence iron oxygen species and singlet oxygen are preferentially generated.

This invention discloses a sodium hypochlorite dosing device for a wastewater treatment plant, belonging to the technical field of wastewater treatment equipment. It includes an operating room with a base connected to its lower end. A dosing component is connected to the upper end of the base. Storage components are connected to both sides of one end of the dosing component, and a data cable is connected to the end of the dosing component furthest from the storage components. A PLC controller is connected to the end of the data cable furthest from the storage components. The PLC-controlled system is linked with a flow meter in real time. A data acquisition module collects the instantaneous flow rate of the effluent in seconds. An algorithm model automatically calculates and adjusts the appropriate dosing amount. An instruction execution module dynamically adjusts the speed of the peristaltic pump, achieving precise matching of more dosing for large volumes and less for small volumes, eliminating errors from manual adjustment. This avoids incomplete disinfection and excessive fecal coliform levels due to insufficient dosing, while also preventing excessive dosing from causing excessive residual chlorine, waste of reagents, and secondary pollution of the water body, ensuring that the disinfection effect of the effluent consistently meets standards.

The utility model relates to water treatment equipment technical field especially for a kind of sodium hypochlorite dosing device for self-cleaning pipeline, including pipeline body, the top of pipeline body is fixedly connected with connecting pipe, the connecting pipe is used to connect pipeline body and injection pipeline, for reagent injection pipeline body, the top of connecting pipe is fixedly connected with connecting flange, the top of connecting flange is fixedly connected with mounting flange by bolt fastening connection, the top of mounting flange is fixedly connected with the injection pipeline for injection reagent, cleaning assembly for cleaning crystalline is provided in the injection pipeline. The device can be through the setting of cleaning assembly, the inner wall of injection pipeline can be continuously cleaned, avoid crystalline gradually become larger and block pipeline, and through the matching setting of impact lever and cleaning plate, the inner wall of injection port can be automatically impacted and cleaned, and crystalline is ejected.

This invention belongs to the field of mine water treatment in metal mines, and specifically relates to a method for the deep purification treatment of thallium-containing metal mine wastewater. This method employs a combined process of "multi-element synergistic oxidation adsorption + composite sulfide precipitation + staged flocculation precipitation + activated carbon deep adsorption." It utilizes the synergistic effect of potassium permanganate, sodium hypochlorite, and ozone as a ternary oxidant to catalyze oxidation, generating MnO2 colloids with high adsorption capacity. This strongly adsorbs thallium, preventing its reduction rebound and amplifying the subsequent treatment effect through adsorption enrichment. Further treatment with a compound sulfide agent and a core-shell structured composite flocculant allows for multiple rounds of adsorption and precipitation, increasing the removal efficiency of low-concentration thallium to over 96%, and reducing the thallium concentration in the effluent to below 0.1 μg / L.

The application discloses a preparation method of visible light response water dispersible titanium dioxide nanomaterial. Under a solvothermal condition, in an alcoholysis process of alkoxy titanate, the alcohol hydroxyl is oxidized into aldehyde group by sodium hypochlorite by using the reducing property of low-carbon dihydric alcohol, and is further oxidized into carboxyl group, which is adsorbed on the surface of newly generated titanium dioxide nanoparticles to give the material excellent water dispersibility. Meanwhile, the oxidation product, chlorine ion, enters the titanium dioxide lattice to form chlorine ion doped titanium dioxide nanomaterial, which expands the absorption spectrum of titanium dioxide to the visible light region and improves the utilization efficiency of sunlight.

The application relates to the technical field of sodium hypochlorite production and preparation, and particularly discloses a device for continuously preparing high-purity sodium hypochlorite, which comprises a first reaction kettle, a first water inlet pipe is connected with a water inlet of the first reaction kettle, and a first conveying pump is arranged on the first water inlet pipe; a first back pressure valve is arranged on the first water inlet pipe between the first conveying pump and the first reaction kettle; a first jacketed heat exchanger is sleeved on the outer circumferential surface of the first reaction kettle, a first jacketed heat exchanger inlet and a first jacketed heat exchanger outlet are arranged on the first jacketed heat exchanger, the first jacketed heat exchanger inlet is connected with a drain outlet of the first reaction kettle through a pipeline, the first jacketed heat exchanger inlet is connected with cooling water through a pipeline, and a second back pressure valve is arranged on the pipeline between the cooling water and the first jacketed heat exchanger inlet. The application has the characteristics of being capable of reducing by-products, improving the effective content and reducing the waste of raw material chlorine.

The utility model relates to the field of sodium hypochlorite generator, especially sodium hypochlorite generator hydrogen discharge and finished product solution anti -precipitation system, including electrolytic cell, separator, storage tank, and fan is connected storage tank, separator respectively through first air path, second air path, the top of storage tank is connected first exhaust pipe, installs the cloth gas device of intercommunication with second air path in storage tank, still installs storage tank liquid inlet pipe on storage tank, and the separator includes mixing chamber, separating chamber, collection chamber from top to bottom, the top of mixing chamber is connected second exhaust pipe, and the lateral wall on mixing chamber lower segment is communicated second air inlet pipe, and second air inlet pipe is communicated second air path, is equipped with the baffle between mixing chamber and separating chamber, and the separating chamber export is set up on the baffle, and the lateral wall on separating chamber is set up separating chamber import, and separating chamber import is communicated electrolytic cell discharge pipe, and separating chamber connects collection chamber, and collection chamber is communicated with storage tank through storage tank liquid inlet pipe, and the system is high in security, and basically does not need maintenance.

The application discloses a method for synthesizing a tirofiban intermediate, and belongs to the technical field of drug synthesis. The method comprises the following steps: reacting chloroacetyl chloride and 1,2-difluorobenzene in dichloromethane as a solvent under the catalysis of aluminum chloride to obtain a TCAB-1 / 2 solution; performing enzyme catalytic reduction on the TCAB-1 / 2 solution to obtain a TCAB-3 mixed solution; dissolving the TCAB-3 mixed solution in toluene after concentration; condensing the TCAB-3 mixed solution in toluene in the presence of sodium tert-butoxide and triethyl phosphonoacetate to obtain a TCAB-4 toluene solution; performing ammination cyclization on the TCAB-4 toluene solution to obtain a TCAB-5 intermediate; mixing the TCAB-5 intermediate with liquid alkali, oxidizing the mixture by sodium hypochlorite, acidifying the mixture, extracting the mixture with isopropyl acetate to obtain an isopropyl acetate solution containing a TCAB-7 intermediate, and performing salt formation and crystallization on the isopropyl acetate solution to obtain the TCAB-7 intermediate. The method realizes the industrialized production of the tirofiban intermediate, is green and environment-friendly, has a simple route and controllable quality.

The present application relates to a kind of foam-rich mould-removing spray, it is characterized in that, by weight percentage, including the following components: sodium hypochlorite aqueous solution, by chlorine element: 1~8%;Base agent, by hydroxyl ion: 0.1~4%;Foam stabilizing component, by active substance: 1~8%;Chlorine stabilizer: 0.05~1%;Water: remainder;The base agent includes at least one of sodium hydroxide or potassium hydroxide;Active substance in the foam stabilizing component includes zwitterionic surfactant and alkyl benzene sulfonate.The present application creates a stable foam system in high alkali, high hypochlorite ion environment by the specific compounding of zwitterionic surfactant and alkyl benzene sulfonate.Successfully solved the technical problem that "strong oxidizing property" and "foam stability" are difficult to consider.

The application provides a kind of sodium hypochlorite automatic continuous production device and method, wherein a kind of sodium hypochlorite automatic continuous production device, including dilute alkali tank, the liquid input end of dilute alkali tank is respectively connected with switchable fresh lye raw material input line and semi-finished product lye raw material input line, the liquid output end of dilute alkali tank is communicated with the liquid storage section of tail gas absorption tower;The liquid output end of tail gas absorption tower is respectively communicated with the top packing layer of tail gas absorption tower, the top packing layer of chlorine absorption tower to form lye circulation line, the top of tail gas absorption tower is provided with tail gas discharge port;The lower packing layer of chlorine absorption tower is communicated with chlorine input line, the top gas outlet of chlorine absorption tower is communicated with the lower packing layer of tail gas absorption tower, the liquid output end of chlorine absorption tower is communicated with the top packing layer of chlorine absorption tower to form lye circulation line, the liquid output end of chlorine absorption tower is communicated with finished product sodium hypochlorite tank.

The present invention relates to chlorine dioxide solution and a method for manufacturing the same. The method for manufacturing chlorine dioxide solution according to the present invention prevents equipment corrosion and environmental pollution, ensures a safe manufacturing process, simplifies the process accordingly, reduces manufacturing costs, and allows for the immediate production of chlorine dioxide solution when needed on-site, thus offering high utility. Furthermore, the chlorine dioxide solution according to the present invention can be produced at a low cost, contains almost no harmful components other than trace amounts of chlorine dioxide that decompose rapidly, and is eco-friendly as it decomposes rapidly after use even if harmful components are present. It also exhibits excellent sterilization power, rapid sterilization effect, and odor removal effect, and is less irritating than other chlorine-based disinfectants such as sodium hypochlorite.

This invention discloses a purification method for n-hexane for spectral analysis and a modified activated carbon used in this method, belonging to the field of high-purity organic solvent purification technology. The method includes: chemical pre-neutralization, stepwise pre-dehydration, deep adsorption, and nitrogen-protected precision distillation. Chemical pre-neutralization uses an alkaline solution to remove acidic impurities; stepwise pre-dehydration uses molecular sieves to reduce the moisture content to below 0.015%wt; deep adsorption uses supported oxidatively functionalized modified activated carbon to selectively adsorb unsaturated hydrocarbons and fluorescent impurities; nitrogen-protected precision distillation further separates residual isomers. The modified activated carbon is activated by impregnation with oxidizing acids such as sodium hypochlorite, introducing oxychlorine functional groups onto its surface, resulting in a BET specific surface area ≥1200 m² / g. The product produced by this purification method has a main content ≥99.995%wt, and all optical indicators meet the T / CRIAC0114-2026 spectral grade standard, making it suitable for continuous industrial production.

This invention discloses a method for preparing high aspect ratio rod-shaped cellulose nanocrystals, belonging to the field of cellulose material preparation technology. Using natural cellulose as raw material, this invention employs a step-by-step oxidation process under alkaline conditions, combined with halogen salt catalysis, to add hypochlorite solution in stages, thereby preparing high aspect ratio rod-shaped cellulose nanocrystals with diameters of 10-50 nm, lengths of 1-10 μm, and aspect ratios of 100-200. This invention effectively solves the problems of excessive fiber degradation, uneven functional group distribution, and easy product agglomeration in traditional sodium hypochlorite oxidation methods through a step-by-step oxidation strategy, achieving precise control of the aspect ratio of cellulose. The resulting cellulose exhibits excellent aspect ratio and dispersibility, and the process conditions are mild and environmentally friendly, providing a reliable pathway for the industrial production of high-performance cellulose materials.

This invention discloses a low-temperature resistant high-elasticity rubber powder for asphalt and its preparation method, belonging to the technical field of rubber powder. Polyethylene glycol, 2,2,6,6-tetramethylpiperidine-1-oxy radical, sodium bromide, and sodium hypochlorite react to obtain carboxyl-terminated polyethylene glycol; the carboxyl-terminated polyethylene glycol and α-cyclodextrin are mixed and then reacted with adamantane, Carter's condensing agent, and N,N-diisopropylethylamine to obtain cyclodextrin-based polyrotaxane; the cyclodextrin-based polyrotaxane, sodium hydroxide, and 2,3-epoxypropyltrimethylammonium chloride react to obtain cationic cyclodextrin polyrotaxane; the cationic cyclodextrin polyrotaxane, lipoic acid, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine react to obtain disulfide-bonded polyrotaxane; the disulfide-bonded polyrotaxane is mixed and stirred with anhydrous ethanol and deionized water to obtain a modified polyrotaxane dispersion; waste rubber powder and the modified polyrotaxane dispersion are mixed and stirred to obtain high-elasticity rubber powder for asphalt.

The present application relates to the technical field of analytical detection, and discloses a kind of sodium hypochlorite quality online detection method and system, the method comprises: in main detection point synchronous acquisition original potential signal and working condition composite signal, and according to its process condition generates dynamic tracking reference detection point.Based on reference detection point signal, residual analysis is carried out on working condition composite signal to generate process mismatch early warning signal, while original potential signal is differentially processed to obtain background compensation potential signal.Then, trend modal component and noise modal component are extracted from background compensation signal by modal decomposition, and the energy standard deviation of noise component is used as dynamic reference to carry out drift test on trend component to generate electrode drift early warning signal.Finally, the system automatically generates corresponding hierarchical control instructions according to the logical combination of the above two early warning signals, realizes closed-loop control from accurate diagnosis to intelligent execution;The present application can improve the precision of sodium hypochlorite quality online detection.

The utility model discloses a solid feeding device of sodium hypochlorite generator relates to the feeding field of solid salt, including the bottom plate, the top of bottom plate is welded with two upwards protruding guide slide bar, the top fixed mounting of guide slide bar has the top plate, the top fixed mounting of top plate has electric push cylinder, the piston rod of electric push cylinder is through to the below of top plate and extends downward, the piston rod bottom fixed mounting of electric push cylinder has with the sliding plate of guide slide bar up and down sliding connection, the inner periphery rotation of bottom plate is installed with the rotating cylinder, the top of bottom plate is installed with the power mechanism of driving the rotation of rotating cylinder, the top end mounting of top plate extends to the feeding mechanism of rotating cylinder inside, and is through to the below of rotating cylinder, this utility model discloses through setting up the feeding mechanism, can realize when discharging sodium chloride solution, intercept the sodium chloride that has not melted, avoid its with entering electrolytic cell.

The utility model discloses an electrolytic chlorine supplement system and equipment, the system includes: the salt tank is dissolved, and the brine in the salt tank is transported to the dilute salt tank through the first pipeline after dilution, the dilute salt tank is connected with electrolytic apparatus through the second pipeline, is provided with brine pump on the second pipeline, and the electrolytic apparatus is connected with sodium hypochlorite tank through the third pipeline, the sodium hypochlorite tank is connected with jet device through the fourth pipeline, is provided with chlorination pump on the fourth pipeline, one end of jet device is connected with the fifth pipeline, the other end of jet device is connected with the sixth pipeline, and the other end of fifth pipeline and sixth pipeline all are connected with water tank, are provided with dosing pump on the fifth pipeline, are provided with pipeline mixer on the sixth pipeline. The utility model adds concentration precision, and the safe and efficient adding mode can effectively solve the problem that the residual chlorine of two water supply tanks, water supply pipe network etc. is low.

The application discloses a kind of undersea wireless power supply equipment bionic coupling prevents and removes marine life system and method, belong to marine engineering technical field.The system includes: bionic microstructure antifouling layer, it is set to the substrate surface of undersea energy equipment and seawater contact, the bionic microstructure imitates the microstructure of shark skin or dolphin skin, with specific rib width, height and pitch, for interfering the attachment and metamorphosis of marine larvae;Electrolytic antifouling unit, including at least one pair of electrodes arranged on the surface of the device, for electrolyzing seawater to generate trace sodium hypochlorite and hydrogen;And central control unit, electrically connected with electrolytic antifouling unit, for controlling the intermittent low-power operation of electrolytic antifouling unit according to the water quality parameters and timing strategy fed back by sensor;The application realizes efficient, long-acting, environmentally friendly antifouling and decontamination by the synergistic effect of physical bionics and green chemistry method, significantly reduces energy consumption and maintenance cost.

This invention relates to the field of compound synthesis technology, specifically disclosing a method for preparing 8-chloronaphtho[1,2-b]benzofuran. The preparation method includes the following steps: mixing compound 1 with a solvent, then adding sodium hydroxide and sodium chloride, followed by dropwise addition of an aqueous solution of sodium hypochlorite, stirring the reaction mixture to obtain the target compound 8-chloronaphtho[1,2-b]benzofuran. The preparation method provided by this invention is low-cost and has a high yield.

The utility model relates to water treatment field, concretely relates to a kind of ultrafiltration dosing pipeline sewage disposal equipment, including dosing tank body, several dosing pipelines are arranged in the dosing tank body, cleaning assembly is arranged in the dosing pipeline, the cleaning assembly includes float ball and floating plate, the floating plate is sleeved on float ball, the floating plate side wall is provided with several cleaning brushes;The cleaning assembly has first state and second state;When the cleaning assembly is in first state, the floating plate rises, and the cleaning brush slides in dosing pipeline inner wall;The utility model is washed by the cleaning assembly design of linkage of float ball and floating plate, and the mechanical cleaning mechanism of periodic up-and-down movement is formed in dosing pipeline;The reciprocating sliding of cleaning brush in pipeline inner wall can effectively strip scale material (such as sodium hypochlorite crystallization or calcium magnesium deposition), prevent pipeline blockage.