232 results about "Sodium hypochlorite solution" patented technology

The invention relates to the field of fine chemical engineering, and discloses a green process for preparing chloramine T by a continuous flow reactor. The method comprises the following steps: respectively pumping p-toluenesulfonamide, a sodium hydroxide solution and a sodium hypochlorite solution into a micro-channel mixer for instantaneous mixing, and carrying out chlorination reaction in a multi-stage temperature control tubular reaction unit; the concentration of free chlorine is detected on line at an outlet, and the flow rate of a chlorine source is dynamically adjusted through a PID algorithm, so that closed-loop control is realized; the reaction liquid is directly crystallized and separated to obtain the product without alkali wash. The system comprises a base solution and chlorine source conveying subsystem, a micro-channel mixer, a multi-stage reaction unit, an online monitoring module, a central controller and a crystallization unit. The side reaction is inhibited from the source, so that the free chlorine is less than or equal to 0.5 mg / L, the alkali washing step is omitted, the COD (Chemical Oxygen Demand) of the wastewater is reduced by more than 80%, the product purity is more than or equal to 99.5%, and the productivity is improved by 3 times.

The utility model relates to the technical field of sewage treatment, in particular to a production system for preparing sodium hypochlorite through electrolysis, which comprises a soft water preparation module, a salt dissolving module, a generator module, a storage module, a feeding module and a pickling module, and the soft water preparation module is respectively connected with the salt dissolving module and the generator module. The soft water preparation module provides soft water for the salt dissolving module and the generator module, saline water output by the salt dissolving module and the soft water conveyed to the generator module by the soft water preparation module are mixed into diluted saline water, then the diluted saline water is input into the generator module, and the generator module electrolyzes to generate a sodium hypochlorite solution and inputs the sodium hypochlorite solution into the storage module. The generator module is further connected with an acid pickling module, the acid pickling module is used for inputting acid liquor into the generator module to clean the generator module, excessive scaling of the generator module is avoided, the production efficiency of the generator module is guaranteed, and the overall production efficiency of the production system is also guaranteed and improved.

This invention discloses a method for determining fiber microplastics in aqueous textile solutions based on fluorescence spectrophotometry, belonging to the field of textile pollutant detection technology. The method includes: S1, collecting wastewater and filtering it through a filter membrane; S2, rinsing the filter membrane with sodium hypochlorite solution; S3, rinsing the fiber microplastics on the filter membrane into a separatory funnel; S4, pouring out a portion of the fiber microplastics from the upper end of the separatory funnel and collecting another portion from the lower end; S5, repeating S1-S4, rinsing the filter membrane with hydrochloric acid during this process, and collecting the remaining fiber microplastics; S6, dyeing the three solutions obtained; S7, preparing standard series solutions using polyester, polyamide, and polypropylene standard liner; S8, measuring and plotting a standard curve of fluorescence intensity versus fiber microplastic concentration using a fluorescence spectrophotometer; S9, measuring the fluorescence intensity of the three solutions obtained in S6. This invention is applicable to the field of aqueous textile solutions, enabling quantitative analysis of unknown samples, and can analyze both single and mixed samples with minimal detection bias.

The invention relates to the technical field of rice seed germination accelerating systems and methods. Seed selection is conducted, specifically, rice seeds which are full and free of damage are screened, and impurities are removed; the rice seeds are soaked in a plant growth regulator mixed solution to be subjected to oscillation treatment, the mixed solution is composed of gibberellin with the concentration being 20-50 mg / L, pimacol with the concentration being 5-15 mg / L and polyoxyethylene lauryl ether with the concentration being 0.01-0.03%, the liquid temperature is kept at 30 + / -2 DEG C, and the treatment time is 2-4 hours; gradient disinfection: primary disinfection: putting the pretreated seeds into a 0.3-0.5% hydrogen peroxide solution at the temperature of 40-50 DEG C, and stirring for 15-20 minutes; secondary disinfection: transferring to a 0.8-1.2% sodium hypochlorite solution at the temperature of 25-30 DEG C, adding a 0.05-0.1 mol / L phosphate buffer solution to adjust the pH value to 6.8-7.2, and standing for 40-60 minutes; the disinfected seeds are put into magnetized water containing 0.1%-0.3% of chitosan derivatives and 0.05%-0.15% of sodium alginate, the magnetic field intensity ranges from 300 gauss to 500 gauss, and ultrasonic waves of 30 kHz to 50 kHz are adopted for assisting permeation for 1 h to 2 h; the rice seed germination accelerating system and method are high in germination accelerating efficiency.

The invention relates to the field of hydrazine hydrate, in particular to an efficient and green hydrazine hydrate synthesis method. The efficient and green hydrazine hydrate synthesis method comprises the following steps: mixing chlorine, sodium hydroxide and water, and reacting to obtain a sodium hypochlorite solution; the method comprises the following steps: mixing a sodium hypochlorite solution, urea and a catalyst, and reacting to obtain hydrazine hydrate, tail gas and a byproduct; and tail gas and by-products are recovered. Through mechanism-driven process design, high efficiency, greenization and economy of hydrazine hydrate synthesis are realized, and a sustainable solution is provided for industrial application.

The invention discloses a sewage treatment membrane and a preparation method thereof, and relates to the field of sewage treatment. When the sewage treatment membrane is prepared, porous nano titanium dioxide, 3, 5-diaminopyrazole and benzo [1, 2-B: 3, 4-B ': 5, 6-B'] trithiophene-2, 5, 8-trialdehyde are uniformly mixed to prepare modified nano titanium dioxide; the preparation method comprises the following steps: reacting 1, 3, 5, 7-tetramethylcyclotetrasiloxane, 1, 3-bis (3-aminopropyl) tetramethyldisiloxane, 2-vinyl imidazole and 1-allylhydantoin to prepare functionalized amino siloxane; and uniformly mixing p-phenylenediamine, functionalized amino siloxane, pyromellitic dianhydride, modified nano titanium dioxide and zinc nitrate hexahydrate, and treating with a sodium hypochlorite solution to obtain the sewage treatment membrane. The sewage treatment membrane prepared by the invention has excellent heavy metal ion complexing property, antibacterial property and photocatalytic degradability.

The invention relates to the technical field of chemical synthesis, and discloses a method for preparing 2, 5-furandicarboxylic acid, which comprises the following steps: dispersing cobalt nitrate and nickel sulfate into an aqueous solution of polyvinylpyrrolidone at room temperature; adding a sodium borohydride solution to obtain nano colloid; preparing an aqueous suspension of cerium oxide, and adding the aqueous suspension into the nano colloid; centrifugally filtering, and recovering a solid product; washing the solid product; centrifuging, putting solid powder obtained after centrifuging into a drying oven, and drying; and calcining and grinding the solid powder to finally prepare the Co-Ni / CeO2 catalyst. And dissolving 5-hydroxymethylfurfural in water at normal temperature, adding the prepared Co-Ni / CeO2 catalyst and a sodium hypochlorite solution, reacting, and filtering to remove the catalyst, thereby obtaining the 2, 5-furandicarboxylic acid. The method disclosed by the invention has the advantages of no use of strong base, low reaction temperature, short reaction time, few byproducts, greenness and sustainability.

The utility model discloses a sodium hypochlorite waste liquid treatment device for a chlorination process titanium dioxide oxidation process, which relates to the technical field of titanium dioxide production waste liquid recovery and treatment and comprises a sodium hypochlorite storage tank, a thick slurry tank, filtering equipment and a clear liquid tank. An outlet of the filtering device is connected with an inlet of the clear liquid tank, the filtering device is a filter press, an outlet is formed in the bottom of the thick slurry tank and connected with an inlet of the filter press, and the clear liquid tank is used for storing qualified filtrate filtered out by the filter press. When the device is used, a natural settling process does not need to be waited, sodium hypochlorite waste liquid collected in the sodium hypochlorite storage tank can be directly fed into the thick slurry tank through the bottom outlet, and solid-liquid separation operation is performed by using the filter press, so that complete recovery treatment of waste alkali liquid in a titanium dioxide tail gas oxidation process is realized; the clarified sodium hypochlorite solution and the titanium dioxide filter cake after filter pressing can be sold as products.

Provided are a preparation process for a modified hydroxyapatite and the use thereof. The preparation process comprises the following steps: S1. removing impurities from coral by using a sodium hypochlorite solution, followed by crushing to obtain coral particles; S2. subjecting the coral particles and a phosphate solution to a hydrothermal reaction at a pH value of 9-11 to obtain coralline hydroxyapatite; S3. mixing and reacting the coralline hydroxyapatite and an ion source to obtain an ion source-doped coralline hydroxyapatite; and S4. heating the ion source-doped coralline hydroxyapatite, and sintering and cooling same to obtain an ion source-doped coralline β-tricalcium phosphate, wherein the ion source comprises a strontium source. The modified hydroxyapatite prepared by the preparation process has a better degradation performance and mechanical adaptability, which improves the biological activity and osteoinductivity of coral artificial bones, and facilitates bone tissue ingrowth.

The invention discloses a novel preparation method of basic magnesium hypochlorite and application of the basic magnesium hypochlorite in magnesium-based flame-retardant antibacterial filler. The novel preparation method comprises the following steps: under the assistance of pulsed ultrasound, adding a buffer solution into a sodium hypochlorite solution to adjust the pH value to 9.0-10.5; then adding a magnesium chloride solution for reaction to prepare basic magnesium hypochlorite; intermittent pulses are adopted in the pulse ultrasound, the frequency is 20-40 kHz, and the power density is 100-500 W / L; the pulse ultrasonic technology is introduced, the reaction process can be optimized through the cavitation effect and the micro-mixing effect, the pH distribution of a reaction system is optimized through pulse ultrasound, local overhigh alkalinity is avoided, generation of magnesium hydroxide is inhibited, the particle size of a product can be effectively reduced, and the yield of the product is improved. High-purity basic magnesium hypochlorite (Mg (OH) 2 is less than 1wt%), high available chlorine (greater than or equal to 41%) and narrow particle size distribution (D50lt; and when the flame-retardant antibacterial filler is used as the flame-retardant antibacterial filler, the performance is more excellent.

The invention provides a method for harmlessly discharging high-salt flowback liquid wastewater and producing a byproduct sodium hypochlorite, and relates to the field of wastewater recycling. The method comprises the following steps: mixing high-salt flowback fluid wastewater with a liquid gel breaker, and carrying out micro-nano bubble aeration treatment to obtain gel-broken viscosity-reduced wastewater; the method comprises the following steps: mixing gel-breaking viscosity-reducing wastewater with a sodium-containing impurity removal agent A, and reacting to obtain primary hardness and impurity removal clear liquid; mixing the primary hardness and impurity removal clear liquid with alkali liquor, and performing ozone nano-bubble treatment to obtain organic matter removal clear liquid; mixing the organic matter removal clear liquid with a sodium-containing impurity removal agent B, and reacting to obtain secondary hardness and impurity removal clear liquid; and filtering the secondary hardness and impurity removal clear liquid through activated carbon, evaporating and concentrating to obtain a sodium chloride solution, and electrolyzing the sodium chloride solution to obtain a sodium hypochlorite solution. According to the method, chloride ions are converted into the sodium hypochlorite solution, and resource utilization is achieved; the treatment pressure of the high-salt flowback fluid can be effectively relieved, and an effective way is found for resource utilization of the high-salt calcium wastewater.

The invention relates to a method for detecting the iron content in sodium hypochlorite, and belongs to the technical field of analytical chemistry detection. The method comprises the following steps: adjusting the pH value of a sodium hypochlorite solution sample, sequentially adding a reducing agent and a buffer solution, and pre-treating the sodium hypochlorite sample to neutralize the strong oxidizing property of the sodium hypochlorite sample and adjust the pH value of the system; then adding a color developing agent to enable the iron ions to form a stable colored complex, finally determining the absorbance by adopting a spectrophotometer under a specific wavelength, and calculating the iron content through a standard curve. The method is simple and convenient to operate and high in adaptability, interference of oxidability and impurity metal ions can be effectively eliminated, the detection sensitivity, accuracy and repeatability are remarkably improved, and the method is suitable for quality control and conventional analysis of a high-purity sodium hypochlorite product.

The invention discloses nano cerium dioxide as well as a preparation method and application thereof. The preparation method of the nano cerium dioxide comprises the following steps: (1) mixing a cerium salt mother solution and a sodium hypochlorite solution for reaction to obtain a first mixed solution; adding an alkali solution into the first mixed solution for reaction, adjusting the pH value of the reaction system to 6-6.5, continuing stirring for reaction at 80-90 DEG C for 1.5-3 hours, adding a sodium hypochlorite solution for reaction, adjusting the pH value of the reaction system to 6-6.5, and continuing stirring for reaction at 80-90 DEG C for 7-17 hours to obtain a second mixed solution; and (2) acidifying the second mixed solution, centrifuging to obtain a cerium dioxide precipitate, and drying the cerium dioxide precipitate to obtain the nano cerium dioxide. According to the method, the superfine nano spherical cerium dioxide particles with good dispersity, uniform particle size and high purity can be prepared at low temperature without adding any organic reagent. The method is short in production period and suitable for large-scale production.

This invention relates to the field of automatic control technology, specifically to a method for stabilizing and controlling the effective chlorine content of sodium hypochlorite solution. During the cooling stage of the sodium hypochlorite solution, an online electrochemical sensor acquires the concentration signal of free trace metal ions in the solution. When the signal reaches a preset threshold of the controller, the controller instructs a peristaltic pump to add a compound stabilizer to the solution. The compound stabilizer is prepared by mixing a specific short peptide containing cysteine ​​and histidine with a silicate buffer solution. After adding the compound stabilizer, the solution undergoes short-term ultrasonic cavitation treatment. This method uses a specific short peptide instead of traditional aminopolycarboxylate salts, avoiding the breaking and failure of carbon-nitrogen bonds under strong oxidizing conditions, preventing secondary release of metal ions that could trigger catalytic decomposition, extending the effective chlorine half-life, and reducing the amount of chlorate byproducts generated.

The invention provides a method for breeding curcuma aromatica through a liquid culture medium and application of the curcuma aromatica, and belongs to the technical field of plant culture.The method comprises the following steps that 1, curcuma aromatica seeds are taken, cleaned and then sequentially disinfected through ethyl alcohol, soaked in a sodium hypochlorite solution, soaked in sterile water and flushed, and disinfected seeds are obtained; (2) inoculating the disinfected seeds to a liquid culture medium, and performing germination culture on the sterile seeds on the liquid culture medium to obtain sterile tissue culture seedlings; and (3) cutting the sterile tissue culture seedlings into stem sections of 2-3cm, inoculating the stem sections with at least one pair of axillary buds to the liquid culture medium with the same composition in the step (2), and carrying out subculture on the tissue culture seedlings. The method provided by the invention has a good tissue culture effect on radix curcumae, can simultaneously realize excellent culture effects in four aspects of germination rate of seeds, average germination rate of tissue culture seedlings, growth height and differentiation rate, and has extremely high research value and application prospect.

The application provides a composite iron phosphate and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing nanocellulose, glacial acetic acid, acetic anhydride, perchloric acid and an organic solvent to obtain acetylated nanocellulose through reaction; (2) mixing nanocellulose, TEMPO and sodium bromide with water, adding sodium hypochlorite solution to obtain oxidized nanocellulose through reaction; (3) mixing the oxidized nanocellulose and the acetylated nanocellulose with an acidic aqueous solution, then mixing with an oily solvent to obtain a water-in-oil emulsion; (4) mixing an iron source, a phosphorus source and the water-in-oil emulsion, and then obtaining the composite iron phosphate through sintering treatment after reaction. The application utilizes the different hydrophilic / hydrophobic difference of acetylated and oxidized nanocellulose to induce the generation of a spherical shell-shaped iron phosphate filled with rod-shaped structures, the nanocellulose forms carbon in situ after high-temperature calcination, and the uniform distribution of the carbon layer is realized, and the conductivity is further improved.

The utility model provides a sewage sterilization treatment device for livestock breeding. The sewage sterilization treatment device for livestock breeding comprises a treatment box, an activated carbon adsorption plate is detachably mounted in the treatment box, and a filter screen is laid on the activated carbon adsorption plate; the storage box is fixedly mounted at the top of the treatment box, the storage box is used for storing a sodium hypochlorite solution, the bottom of the storage box is fixedly communicated with a liquid discharging pipe, a proportional valve is arranged on the liquid discharging pipe, and the liquid discharging pipe extends into the treatment box; and the two mounting frames are fixedly mounted at the top of the storage box, and drying plates are detachably mounted in the mounting frames. The sewage sterilization treatment device for livestock breeding, provided by the utility model, has the advantages that the device is convenient to use, a sodium hypochlorite solution can be automatically supplemented, the sodium hypochlorite solution can be dried, and the sewage treatment effect is ensured.

The invention belongs to the technical field of sodium hypochlorite preparation, and provides a hydrogen-free sodium hypochlorite preparation system and a sodium hypochlorite preparation technology.The sodium hypochlorite preparation system comprises a brine electrolysis device, and a liquid inlet of the brine electrolysis device communicates with a pipeline mixer through an electrolyte conveying pipeline; a liquid inlet of the pipeline mixer is respectively communicated with a saturated salt water preparation device and a saturated salt water dilution device, a liquid outlet of the salt water electrolysis device is communicated with a sodium hypochlorite storage tank through a sodium hypochlorite conveying pipeline, and a liquid outlet of the sodium hypochlorite storage tank is communicated with a metering and adding device; the brine electrolysis device comprises an air cathode electrolytic cell and a rectification power supply, the air cathode electrolytic cell comprises a cell body, the cell body is provided with a containing cavity for containing electrolyte, and an anode and a cathode which are electrically connected with the rectification power supply are fixedly installed on the cell body. According to the method, the sodium hypochlorite solution is prepared efficiently and safely, no hydrogen is generated in the electrolysis process, the operation safety is remarkably improved, and the method is safer and more environmentally friendly.

The invention provides a method for removing heavy metals in wastewater containing heavy metal complexes, which comprises the following steps: acidizing the wastewater containing the heavy metal complexes until the pH value is less than 7.0, mixing the wastewater containing the heavy metal complexes with reduced iron powder and a sodium hypochlorite solution, carrying out catalytic oxidation reaction for decomplexing, and then carrying out precipitation treatment to remove the heavy metals. According to the method for removing the heavy metals in the wastewater containing the heavy metal complexes, the heavy metals in the wastewater containing the heavy metal complexes are efficiently removed, the removal efficiency can reach 85% or above, the sludge yield is obviously reduced, the slag rate can be reduced to 2.2% or below, and the method is simple in technological process, environmentally friendly and low in cost.

The invention discloses a fresh-keeping method of outer-plug red apples. The fresh-keeping method comprises the following steps: S1, soaking apples in a sodium hypochlorite solution with the concentration of 10 mmol / L to 20 mmol / L for 5 to 10 minutes; s2, soaking the rinsed apples in a melatonin aqueous solution with the concentration of 100 [mu] mol / L to 500 [mu] mol / L for 5 to 10 minutes under a dark condition; s3, the aired apples are placed in plastic fruit baskets with the capacity of 15 L to 20 L in a layered mode; s4, putting the apples in the plastic fruit basket into a low-density polyethylene film bag, wherein the volume of the apples accounts for two thirds of the total volume of the film bag; s5, the packaged apples are placed in a precooling environment at the temperature of 2 DEG C to 3 DEG C to be precooled for 60 hours to 80 hours; and S6, transferring the precooled apples to a storage environment with the temperature of 4 DEG C and the relative humidity of 80% for long-term storage. The method can maintain the apple quality and prolong the shelf life.

The invention relates to the technical field of grape seed germination methods, and discloses a method for promoting rapid germination of grape seeds, which comprises the following steps: collecting ripe grape fruits, stripping the seeds, washing with clear water for 3-5 times, drying the seeds in the shade, sub-packaging the seeds in centrifugal tubes, preserving at 4 DEG C for later use, placing the seeds in 75% alcohol, oscillating for 5 minutes, washing with sterile water for 3-5 times, and taking out the seeds. Transferring into a 1% sodium hypochlorite solution, oscillating for 30 minutes at the speed of 150r / min, cleaning with sterile water for 3-5 times, cutting off beaks and cotyledon ends of the seeds by using disinfection scissors, simultaneously cutting off the beaks and the cotyledon ends, not performing treatment, immersing the treated seeds into a 150mg / L gibberellin solution, oscillating for 8 hours at the room temperature at the speed of 150r / min, cleaning with sterile water for 3-5 times, absorbing moisture with filter paper, laying the filter paper and sterile gauze in a culture dish, and transplanting the seeds into the culture dish. Adding sterile water until the seeds are wet and free of accumulated water, setting three repetitions for each treatment group, uniformly placing 50 seeds for each repetition, culturing at 25 + / -2 DEG C, alternating illumination / darkness for 12 hours, supplementing water every 3 days, and recording the germination number and the root length.

The invention relates to an impurity removal method of a chlorine dioxide vertical generator, which comprises the following steps: adding first pure water and a sodium hypochlorite solution into the chlorine dioxide vertical generator, continuously boiling under a vacuum condition, cooling and discharging liquid; washing with second pure water and discharging liquid; the boiling temperature is lower than 80 DEG C. Different from the prior art, the technical scheme provides a mode for efficiently removing impurities in a mode that the sodium hypochlorite solution is boiled at the temperature lower than 80 DEG C, the boiling temperature in the mode is lower than the efficient decomposition temperature 80 DEG C of hypochlorite, the hypochlorite is high in stability, the decomposition amount is small although the hypochlorite is boiled, and therefore the impurity removing efficiency is higher; the chlorine dioxide vertical generator impurity removal device has the advantages of simple and effective impurity removal of the chlorine dioxide vertical generator, no residue, reduction of the decomposition of chlorine dioxide, and improvement of the production efficiency and the production safety.

The invention belongs to the technical field of poultry egg cleaning, and particularly discloses a poultry egg shell surface cleanliness degree evaluation method and system, and the method comprises the following steps: collecting a poultry egg image, extracting the color of a poultry egg shell before and after cleaning, and calculating the average RGB gray value of the area of the poultry egg shell; and constructing an RGB gray histogram, establishing a color difference model, and analyzing and judging the surface cleanliness of the egg shell according to the displacement change of pixel points of the RGB histogram of the egg shell before and after cleaning. According to the method, the colors of the eggshells of the poultry eggs with different pollution degrees before and after cleaning are extracted, the cleanliness degree of poultry egg cleaning is represented according to the displacement changes of the pixel points of the RGB histograms of the eggshells before and after cleaning, and a basis is provided for quantitative evaluation research of the cleanliness degree of the poultry eggs. The evaluation method is used for detecting the poultry egg cleaning effect of water and a sodium hypochlorite solution, and the comprehensive judgment accuracy of the eggshell cleaning degree reaches 96% or above.

The invention relates to the field of astragalus membranaceus breeding, and particularly discloses an astragalus membranaceus breeding method combining space mutagenesis with phenotype screening, which comprises the following steps: S1, seed pretreatment: space mutagenesis: carrying original seeds on a return satellite, exposing the original seeds on an orbit 200-400km away from the ground for 48-72 hours, and receiving a space radiation dose of 2-5Gy; disinfection treatment: soaking the mutagenized seeds in a 3-5% sodium hypochlorite solution for 15-20 minutes, and then washing the seeds with sterile water for 3 times; through the synergistic effect of space mutation and phenotype screening, the limitation that traditional mutation breeding is high in randomness is broken through, the directional screening efficiency of target characters is remarkably improved, and meanwhile stable transmission of excellent hereditary characters is guaranteed; through combination of multi-dimensional phenotypic indexes of root development, biomass accumulation and stress resistance, superior plants with high medicinal component enrichment capacity and wide adaptability are accurately locked, and the problem of comprehensive performance imbalance caused by single character screening is solved.

The utility model discloses sewage treatment integrated equipment. Comprising a box body, and an equipment chamber and a reaction chamber are arranged in the box body; ozone generation equipment, a sodium hypochlorite solution storage tank and control equipment are arranged in the equipment chamber; the interior of the reaction chamber is divided into an ozone reaction chamber and a chlorination reaction chamber which are communicated end to end through a partition plate; a raw water distribution pipe and an ozone solution distribution pipe are arranged at the head of the ozone reaction chamber; a sodium hypochlorite solution water distribution pipe is arranged at the head part of the chlorination reaction chamber, and a water drainage pipe is arranged at the tail part of the chlorination reaction chamber; a water outlet of the ozone dissolved air tank is communicated with an ozone solution water distribution pipe through a pipeline; and the sodium hypochlorite solution distribution pipe is communicated with the sodium hypochlorite solution storage tank through a pipeline. According to the utility model, a combined process of ozone oxidation and sodium hypochlorite oxidation is adopted, so that sewage containing more ammonia nitrogen and organic matters in the chemical industry park can be efficiently treated.

The utility model relates to a sodium hypochlorite feeding device for sewage treatment. The sodium hypochlorite feeding device comprises a medicine storage box, a purification pipe, a liquid conveying pipe and a cleaning mechanism, the purification pipe is positioned below the pesticide storage box; the infusion tube is located between the pesticide storage box and the purification tube, one end of the infusion tube communicates with the pesticide storage box, and the other end extends into the purification tube; the cleaning mechanism is arranged on the purification pipe and comprises a machine box connected with the outer side wall of the purification pipe, a first motor movably arranged in the machine box, a rotating rod connected with the output end of the first motor and a driving unit used for driving the first motor to move in a reciprocating mode, the rotating rod extends into the purification pipe, and spiral blades are arranged on the periphery of the rotating rod. And the spiral blade can extend into the infusion tube and is in contact with the inner side wall of the infusion tube. According to the utility model, a sodium hypochlorite solution can be instantly mixed with sewage to be treated, so that the sodium hypochlorite solution can be quickly and uniformly distributed in the sewage, the disinfection efficiency is improved, and the cleaning mechanism ingeniously solves the problem of blockage of the infusion tube.

The invention discloses a method for preparing a nanoscale cellulose material from soybean shells, and relates to the technical field of nano modification. The method comprises the following steps: crushing degreased and impurity-removed soybean shells, and extracting with a 70-90wt% ethanol aqueous solution at 60 + / -5 DEG C for 2-4 hours to obtain a mixed solution; stirring with 2-6wt% of sodium hydroxide or potassium carbonate solution at the speed of 60-80rpm and the temperature of 80-95 DEG C for 1-4 hours to obtain coarse cellulose slurry; treating with a 1-3wt% sodium hypochlorite solution at the temperature of 60-80 DEG C for 0.5-2 hours to obtain a treatment solution; the preparation method comprises the following steps: preparing a slurry, drying at a low temperature of 30-40 DEG C for 12-24 hours, re-suspending until the slurry is 5-10 wt%, adding 0.1-0.3 time of TEMPO, 0.2-0.4 time of sodium bromide and 0.05-0.1 time of 2-4 wt% amino trimethylene phosphonic acid, reacting for 2-6 hours at a pH value of 9-11 and a temperature of 60-80 DEG C, performing ultrasonic-assisted treatment, centrifuging, and homogenizing to obtain modified cellulose; and performing membrane dialysis and freeze-drying to obtain powder. The method is low in raw material cost and green in process, the nano cellulose with the diameter of 20-50 nm, the high crystallinity of 60-80% and the thermal stability of 300-350 DEG C is obtained, and the method is suitable for the fields of composite material reinforcement and the like.

The utility model discloses a gutta percha point trimming, measuring and disinfecting integrated tool, which relates to the technical field of tooth restoration auxiliary devices, and comprises a base body and a trimming component, a measuring part and a disinfecting part are arranged on the same side of the base body, the measuring part is positioned on two sides of the disinfecting part, the trimming component is fixedly connected to the side surface of the base body, the disinfection part comprises an airing slope and a plurality of disinfection cavities, the surface of the base body is concaved inwards to form the disinfection cavities and the airing slope, and the airing slope is located on one side of the disinfection part. The gutta-percha point is cut to the required size through the trimming assembly, then the length of the gutta-percha point is measured through the measuring part, the gutta-percha point is marked, a sodium hypochlorite solution and ethyl alcohol can be poured into the multiple disinfection cavities respectively, and the gutta-percha point is sequentially soaked in the sodium hypochlorite solution and the ethyl alcohol, then taken out, placed on the object airing slope and aired for use. And medical personnel do not need to frequently switch among a plurality of devices, so that the treatment flow of the gutta-percha point is greatly simplified, and the operation time is shortened.

This invention provides a method for treating hydrometallurgical extraction wastewater, comprising the following steps: (1) mixing the extraction wastewater and a calcium source, stirring once, and then performing solid-liquid separation to obtain a first filtrate; (2) mixing the first filtrate and carbonate, stirring twice, and then filtering to remove calcium to obtain a second filtrate; (3) mixing the second filtrate and a defluorinating agent, and then sequentially performing acid-base adjustment, stirring three times, and solid-liquid separation to obtain a third filtrate; (4) mixing the third filtrate and sodium hypochlorite solution, stirring four times, and then obtaining treated purified water. The treatment method provided by this invention can effectively reduce fluoride ions and oil content in wastewater, meeting wastewater discharge standards. Furthermore, the treatment method is low-cost, low-energy-consumption, pollution-free, and simple to operate, and has significant application prospects.

The invention relates to the technical field of wastewater treatment, in particular to an acetylene production wastewater recovery process which comprises the following steps: S1, collecting waste sodium hypochlorite liquid generated in an acetylene cleaning process and cooling wastewater generated in an acetylene cooling tower according to an actual yield ratio, pumping into a regulating tank, and homogenizing water quality and water quantity; according to the method, more than 90% of dissolved acetylene in the wastewater is efficiently recovered through micro-negative pressure desorption, resource utilization is realized, secondary phosphorus and phosphorous which are difficult to degrade are thoroughly converted into positive phosphorus through Fenton oxidation, and the total phosphorus concentration is reduced to 0.5 mg / L or below in combination with neutralization and flocculation, so that the first-grade discharge standard is met, and the method is suitable for industrial production. The pH value of the purified water is finely adjusted to 10-11, then the purified water is used as a dilution carrier to be compounded with the sodium hypochlorite working solution, and the pH value after mixing is ensured to be always greater than 9.5, so that the pH dangerous interval is fundamentally avoided, the chloroacetylene explosion hidden danger is remarkably eliminated, the safety of the whole process is improved, the whole process forms a closed cycle, and the treated water is used for completely replacing fresh water to prepare the working solution.