173 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 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 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 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.

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 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 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 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 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.

The invention relates to the technical field of disinfectant preparation, in particular to a preparation technology, device and formula of disinfection sodium hypochlorite capable of being stored for a long time. The preparation technology comprises the steps that a sodium hypochlorite solution and a stabilizer are mixed and stirred to be uniform, and a first mixed solution is obtained; adding a pH regulator into the first mixed solution to adjust the pH value of the solution to 8.0-10.5; adding a preservative and / or a surfactant into the solution of which the pH value is adjusted to obtain a second mixed solution; and filtering and clarifying the second mixed solution to obtain the disinfected sodium hypochlorite. According to the preparation technology of the disinfection sodium hypochlorite, the stabilizer, the pH regulator, the preservative and the surfactant are selected and proportioned, strict technological process control is combined, the high stability and the long-term effect of the sodium hypochlorite solution are achieved, and the preparation technology is suitable for wide disinfection application scenes.

The application provides a synthesis method of 9,10-dibromoanthracene, by introducing HBr generated by a solvent water adsorption reaction, using an industrial sodium hypochlorite solution to react the HBr into bromine, ensuring high concentration of bromine, introducing a solvent dichloroethane to uniformly disperse raw materials, keeping the concentration of bromine stable in the reaction, greatly promoting the reaction speed, greatly shortening the reaction time, and converting the sodium hypochlorite into a sodium chloride aqueous solution after the reaction is completed. The purity of the prepared 9,10-dibromoanthracene is more than 99%, and the by-products generated in the reaction are environment-friendly and non-polluting.

The application discloses a preparation method of a SERS label with Fabry-Perot optical cavity and localized surface plasmon resonance coupling effect, which comprises the following steps: depositing a copper film on the surface of a polymethyl methacrylate (PMMA) film by using a thermal evaporation technology, generating copper oxide nano spicules by reacting with a sodium hypochlorite solution, depositing silver nanoparticles on the surface of the copper oxide spicules by using a magnetron sputtering technology, and re-depositing a gold layer by using the thermal evaporation technology, so as to obtain a gold@silver nanoparticle / copper oxide spicule / PMMA flexible SERS substrate; and then the substrate is folded, heated and pressed to obtain the SERS label with Fabry-Perot optical cavity and localized surface plasmon resonance coupling effect. The SERS label provided by the application comprehensively integrates capillary action, Fabry-Perot optical cavity and localized surface plasmon resonance, effectively excites a high-intensity and large-volume hotspot, and makes trace biomarkers in a complex solution more easily captured by the large-volume hotspot, so that the in-situ SERS detection performance is improved.

The application provides a method for promoting Talaromyces cucurbitiradicus to utilize ethanol to produce PHA by activated carbon, and belongs to the technical field of bio-chemical industry.The method comprises the following steps: adding ethanol, a nitrogen source and buffer salt into water to prepare a fermentation substrate, then inoculating Talaromyces cucurbitiradicus into the fermentation substrate, adding activated carbon and uniformly dispersing, fermenting the obtained fermentation liquid, filtering, treating the obtained fermentation liquid with sodium hypochlorite solution, filtering, dispersing the obtained wet filter cake with chloroform, then adding methanol or ethanol to precipitate PHA, filtering, and obtaining PHA solid.The method can significantly strengthen the metabolic ability and PHA accumulation ability of Talaromyces cucurbitiradicus by adjusting the adding amount of activated carbon and setting a nutrition limiting condition, so that the high-efficiency utilization of ethanol carbon source and the high-level accumulation of PHA are realized.

The utility model relates to the technical field of sodium hypochlorite generators, in particular to a sodium hypochlorite cooler which comprises a storage box body, an arc-shaped inner container, a box cover, an injection port and a cooling assembly, the arc-shaped inner container is fixedly connected with the storage box body, the box cover is fixedly connected with the storage box body, and the injection port is fixedly connected with the box cover. The cooling assembly comprises a circulating part, a liquid inlet pipe, a sealing shaft, two cooling boxes, a tubular cooling pipe, a liquid outlet pipe and an auxiliary part, the circulating part is fixedly connected with the storage box body, the liquid inlet pipe is fixedly connected with the circulating part, the sealing shaft is fixedly connected with the storage box body, the two cooling boxes are fixedly connected with the storage box body, the tubular cooling pipe is fixedly connected with the cooling boxes, and the auxiliary part is fixedly connected with the liquid outlet pipe. The liquid outlet pipe is fixedly connected with the storage box body, and the auxiliary part is fixedly connected with the box cover, so that the tubular cooling pipe can be in large-area contact with the sodium hypochlorite solution, and the rapid and uniform cooling effect of the sodium hypochlorite solution is realized through the circulation of the cooling liquid.

The application discloses a kind of breathable far infrared fiber fabric and preparation method thereof, it is related to fiber fabric technical field.The application is prepared when breathable far infrared fiber fabric, phosphorus-containing triamino compound is reacted with double bond modified silane, hydroxypropyl methacrylate, 2-[2-hydroxy-5-[2-(methacryloyloxy) ethyl] phenyl]-2H-benzotriazole to obtain modified liquid;Pre-modified graphene is reacted with 3-bromopropyl-5,5-dimethyl hydantoin to obtain modified graphene;After dispersing modified graphene, fiber, 3-glycidyl ether oxypropyl trimethoxysilane, modified liquid are added, and modified fiber is prepared after reaction;After weaving and spinning modified fiber, soak sodium hypochlorite solution, and prepare breathable far infrared fiber fabric.The breathable far infrared fiber fabric prepared by the application has the advantages of air permeability, far infrared, antibacterial, flame retardant, ultraviolet protection and washing resistance.

The invention belongs to the technical field of plant tissue culture, and particularly discloses a method for establishing a rapid propagation system of Buddhist viridae. The method comprises the steps of explant disinfection, adventitious bud induction, bud proliferation and seedling strengthening and rooting, firstly, 75% alcohol is used for soaking for 30 seconds, then one drop of Tween-20 sodium hypochlorite solution with the concentration being 2% is added for disinfection for 15 minutes, the survival rate of explants reaches 73.3%, and the pollution rate is reduced to 11.1%; a specific hormone ratio is adopted, bud induction: 6-BA is 1.0 mg / L + IBA is 0.3 mg / L, and the germination rate is 94.4%; bud proliferation: 6-BA is 0.5 mg / L + IBA is 0.3 mg / L, and the proliferation coefficient is 4.1; and rooting: IBA is 0.2 mg / L and NAA is 0.2 mg / L, the rooting rate is 100%, the survival rate, the bud induction rate and the multiplication coefficient of the explants are remarkably improved, and the method is easy and convenient to operate, efficient, environmentally friendly and suitable for large-scale production.

The invention discloses a method for disinfecting by efficiently generating hypochlorous acid on site through a hydration method. The method comprises the following steps: 1, checking and preparing equipment; 2, pretreating the raw materials; step 3, carrying out hydration reaction on CO2 and water; 4, conveying and preparing a sodium hypochlorite solution; 5, adding a mixture of the hydration reaction of CO2 and water for reaction; step 6, mixing and adding a hypochlorous acid solution and a mixture of a hydration reaction of CO2 and water; step 7, monitoring and adjusting a disinfection process; 8, automatic control and remote monitoring are carried out; ninthly, equipment is maintained and maintained; hypochlorous acid is efficiently generated on site through a hydration method, the problem that hypochlorous acid is difficult to store for a long time and transport for a long distance is solved, the disinfection efficiency is greatly improved, and the disinfection cost is reduced. By accurately controlling the reaction conditions, the generated hypochlorous acid is ensured to have an optimal disinfection effect, and automation and safety of operation are realized at the same time.

The invention belongs to the technical field of domestic sewage treatment, and relates to a disinfectant dispensing and adding system and method for self-circulation of domestic sewage of a thermal power plant. Sewage treated by the contact disinfection tank flows into the clean water tank, and water in the clean water tank is introduced into the sodium hypochlorite solution tank for preparing a sodium hypochlorite solution, so that cyclic utilization of water in the system is realized, and dependence on an external water source is reduced. The high-concentration sodium hypochlorite raw material is mixed with the water from the clean water tank according to a certain proportion, so that the concentration of the prepared sodium hypochlorite solution can be accurately controlled. A sodium hypochlorite solution with a proper concentration prepared in the sodium hypochlorite solution tank is conveyed to the contact disinfection tank and is used for disinfecting the pretreated sewage. The low-concentration online sodium hypochlorite solution detector and the high-concentration online sodium hypochlorite solution detector are used for accurately detecting the concentration of the sodium hypochlorite solution, so that the mixing proportion of incoming water of the sodium hypochlorite storage tank and the clean water tank can be accurately controlled.

We provide technology that can effectively maintain the freshness of daikon radish salad. [Solution] The freshness-preserving packaging container of the present invention is for radish salad and is made of resin film, and satisfies the following requirement 1. (Requirement 1) 125g of salad containing 55-70% by mass of cut radish obtained by the following procedure is placed in the freshness-preserving packaging container, sealed, and then stored at 10°C for 48 hours. The CIE1976-L of the cut radish immediately after sealing and after being stored at 10°C for 48 hours. * a * b * b in the color system * Difference in values ​​(Δb) * ) is 5 or less. Procedure: Wash the raw green-necked radish. Next, cut the part of the green-necked radish excluding the leaves and peel into pieces 50-65 mm long and 2-3 mm thick, then sterilize with a 100 ppm sodium hypochlorite solution, dehydrate, and obtain cut radish.

The invention relates to the technical field of semiconductor material precision machining, in particular to a chemical mechanical polishing solution as well as a preparation method and application thereof. The chemical mechanical polishing solution comprises the following components in percentage by mass: 6-12% of a composite abrasive, 3-7% of a composite oxidant, 2-5% of a complexing agent, 0.5-2% of a phosphine antidote, 0.3-1.5% of a dispersion stabilizer, 0.1-1% of a pH regulator and the balance of water. The composite abrasive is a composite material of aluminum oxide and silicon dioxide; the composite oxidant comprises a sodium hypochlorite solution and a hydrogen peroxide solution. Through reasonable proportioning and synergistic effect of the composite abrasive, the composite oxidant, the complexing agent, the phosphine antidote, the dispersion stabilizer and the pH regulator, the polishing solution is not only suitable for a single substrate, but also compatible with chemical mechanical polishing of three typical third-generation semiconductor materials of indium phosphide, gallium arsenide and germanium, has good universality and process adaptability, and is suitable for industrial production. And the production cost and the process switching complexity can be reduced.

The application provides a method for breeding radix curcumae in liquid medium and application thereof, and belongs to the technical field of plant culture. The method comprises the following steps: (1) taking radix curcumae seeds, washing, and then sequentially using alcohol disinfection, sodium hypochlorite solution immersion, sterile water immersion and washing to obtain disinfected seeds; (2) inoculating the disinfected seeds into liquid medium, and culturing the sterile seeds on the liquid medium to obtain sterile tissue culture seedlings; (3) cutting the sterile tissue culture seedlings into stem segments with a length of 2-3 cm, each of the stem segments having at least one pair of axillary buds, and inoculating the stem segments into the liquid medium of the same composition in step (2) to carry out tissue culture seedling subculture. The method has good tissue culture effect on radix curcumae, can simultaneously achieve excellent cultivation effects in the germination rate of seeds, the average germination rate of tissue culture seedlings, the growth height and the differentiation rate, and has high research value and application prospect.